Load Collectors
Load collectors collect and organize loads, constraints, and equations.
Abaqus Cards
Card  Description 

*CFILM  Defines film coefficients and associated sink temperatures at one or more
nodes or vertices. Note: Only in HISTORY card image.

*CONNECTOR HARDENING  
*CONNECTOR LOAD  Specifies loads for available components of relative motion in connector
elements. Note: Only in HISTORY card image.

*CONNECTOR MOTION  Specifies the motion of available components of relative motion in connector
elements. Note: In both HISTORY and INTIAL_CONDITION card image.

*DLOAD,VBF (Viscous body force) 
Note: Only in HISTORY card image.

*DSLOAD  Specifies distributed surface loads. Note: Only in HISTORY card image.

*INERTIA RELIEF  Applies inertiabased load balancing. Note: Only in HISTORY card image of
Standard template.

*INITIAL_CONDITION_FLUID_PRESSURE  Specifies initial pressures for hydrostatic fluid filled cavities. 
*INITIAL_CONDITION_TEMPERATURE  Specifies initial temperatures for heat transfer analysis. 
*INITIAL_CONDITION_TYPE_STRESS  Specifies initial stresses. 
*INITIAL_CONDITION_VELOCITY  Specifies initial velocities for dynamic analysis. 
*SFILM  Define film coefficients and associated sink temperatures over a surface for
heat transfer analysis. Note: Only in HISTORY card image.

*TRANSPORT VELOCITY  Define the angular velocity of material transported through the mesh of a
deformable body or the transport of material relative to the reference node of a
rigid body during a steadystate transport analysis. Note: Only in HISTORY card image.

EXODUS Cards
Card  Description 

Acceleration  
Boundary  
Force  
Flux  
Moment  
Thermal  
Velocity 
LSDYNA Cards
Load collector information is specified with a required $HMNAME comment card and an optional $HMCOLOR comment card. If an input translator encounters one of these comments while reading a load card, a new load collector is created. For the comments to be valid, they must follow a load keyword or the last line of the previous Structured block. The loads that follow a $HMNAME LOADCOLS comment are read into that collector. If there is a new keyword or structured block, the previous load collector information is ignored.
 Mechanical loads for forces and moments
 Constraints/Displacements
 Velocities
 Accelerations
 Pressures
If translational or rotational constraints are defined in the input model, they are placed in a separate load collector named Nodal Constraints.
Load collectors are not used by LSDYNA, but are useful for visualization. Additional load collectors can be defined to describe other entities.
Card  Description 

*BOUNDARY_NON_REFLECTING  Define a nonreflecting boundary. This option applies to continuum domains modeled with solid elements. 
*BOUNDARY_NON_REFLECTING_2D  Define a nonreflecting boundary. This option applies to continuum domains modeled with twodimensional solid elements in the 𝑥𝑦 plane. 
*BOUNDARY_PRESCRIBED_ACCELEROMETER_RIGID  Prescribe the motion of a rigid body based on experimental data obtained from accelerometers affixed to the rigid body. 
*CONSTRAINED_RIGID_BODY_STOPPERS  Stops the motion based on a time dependent constraint. The stopper overrides prescribed motion boundary conditions, except relative displacement, operating in the same direction for both the main and secondary rigid bodies. 
*DEFINE_CURVE_FEEDBACK  Define information that is used as the solution evolves to scale the ordinate values of the specified load curve ID. 
*DEFORMABLE_TO_RIGID 
Define materials to be switched to rigid at the start of the
calculation.
Note: Select an arraycount for the PSID and MRB pairs.

*DEFORMABLE_TO_RIGID_AUTOMATIC 
Define a set of parts to be switched to rigid or to deformable at some stage
during the calculation.
Note: Change the option to automatic and card edit. In
the D2R fields enter the number of PIDs that need to be converted to Rigid.
Create an entity set of comps of the secondary PIDs and select the
set.

*DEFORMABLE_TO_RIGID_INERTIA  Inertial properties can be defined for the new rigid bodies that are created when the deformable parts are switched. These can only be defined in the initial input if they are needed in a later restart. 
*INITIAL_AXIAL_FORCE_BEAM  Initialize the axial force resultants in beam elements that are used to model bolts. 
*INITIAL_CONTACT_WEAR  Initialize contact wear for simulation of wear processes. 
*INITIAL_CRASHFRONT  Card allows the user to initialize crashfront nodes for damage that may occur prior to the simulation. 
*INITIAL_DETONATION  Define points to initiate the location of high explosive detonations in part IDs which use the material (type 8) *MAT_HIGH_EXPLOSIVE_BURN. 
*INITIAL_STRESS_SECTION  Initialize stress in solid sections 
*INITIAL_VEHICLE_KINEMATICS  Define initial kinematical information for a vehicle. 
*INITIAL_VELOCITY_GENERATION_START_TIME  Define a time to initialize velocities after time zero. 
*INTERFACE_SPRINGBACK  Define a material subset for an implicit springback calculation in LSDYNA and any nodal constraint to eliminate rigid body degreesoffreedom. 
*INTERFACE_SPRINGBACK_LSDYNA  
*INTERFACE_SPRINGBACK_LSDYNA_NOTHICKNESS  
*INTERFACE_SPRINGBACK_LSDYNA_THICKNESS  
*INTERFACE_SPRINGBACK_NASTRAN  
*INTERFACE_SPRINGBACK_NASTRAN_NOTHICKNESS  
*INTERFACE_SPRINGBACK_NASTRAN_THICKNESS  
*INTERFACE_SPRINGBACK_SEAMLESS  
*INTERFACE_SPRINGBACK_SEAMLESS_NOTHICKNESS  
*INTERFACE_SPRINGBACK_SEAMLESS_THICKNESS  
*LOAD_BLAST  Define an airblast function for the application of pressure loads due to explosives in conventional weapons. 
*LOAD_BODY_GENERALIZED  Define body force loads due to a prescribed base acceleration or prescribed angular velocity over a subset of the complete problem. 
*LOAD_BODY_PARTS 
Define body force loads due to a prescribed base acceleration or angular
velocity using global axes directions.
Note: Select component set.

*LOAD_BODY_VECTOR 
Define body force loads due to a prescribed base acceleration or angular Velocity, for loading in any direction, specified by vector components 
*LOAD_BRODE  Define Brode function for application of pressure loads due to explosion. 
*LOAD_SUPERELASTIC_FORMING 
Perform superplastic forming (SPF) analysis, this option must be used with material model 64, *MAT_RATE_SENSITIVE_POWERLAW_PLASTICITY, for strain rate sensitive, powerlaw plasticity. 
Nastran Cards
Nastran supports specific and generic load collectors. Specific load collectors have a card image which can be edited to group other load collectors together for simultaneous application in a single subcase, or to provide special information for a specific analysis type, such as modal analysis. Use specific load collectors for specialized loading cards, such as SPCADD, MPCADD, EIGRL, EIGB, EIGC, EIGP, EIGR, FREQ, FREQ1, LOAD, GRAV, RFORCE, and TEMPD. Generic load collectors do not have a card image. Use generic load collectors to collect loads and constraints for display purposes and to assign an ID to the loads.
General boundary conditions, such as loads and constraints, should not be collected into specific load collectors. Organizing loads and constraints into a specific load collector may result in an error termination.
 If overwrite is off (default), the new load collector’s ID is offset and all loads in that collector will have a new SID upon export.
 If overwrite is on, the new load collector replaces the existing load collector. The original load collector and the loads it contains are deleted.
Card  Description 

ACSRCE  Defines the power versus frequency curve for a simple acoustic source. 
AEFACT  Defines real numbers for aeroelastic analysis. 
AEPARM  Defines a general aerodynamic trim variable degreeoffreedom (aerodynamic extra point). 
AESTAT  Specifies rigid body motions to be used as trim variables in static aeroelasticity. 
AEFORCE  Defines a vector of absolute or “per unit dynamic pressure” forces associated with a particular control vector. 
BCPARA  Defines contact parameters. 
BCRPARA  
BMFACE  
DAMPING  Defines a parameter and hybrid damping specification. 
DELAY  Defines the time delay term in the equations of the dynamic loading
function. Note: Supported as constraints.

DLOAD  Defines a dynamic loading condition for frequency response or transient response problems as a linear combination of load sets defined via RLOAD1 or RLOAD2 entries for frequency response or TLOAD1 or TLOAD2 entries for transient response 
DTI SPECSEL  Defines table data blocks 
EIGB  Defines data needed to perform buckling analysis 
EIGC  Defines data needed to perform complex eigenvalue analysis 
EIGP  Defines poles that are used in complex eigenvalue extraction by the Determinant method 
EIGR  Defines data needed to perform real eigenvalue analysis 
EIGRL  Defines data needed to perform real eigenvalue (vibration or buckling) analysis with the Lanczos method 
FLFACT  Used to specify density ratios, Mach numbers, reduced frequencies, and velocities for flutter analysis. 
FLUTTER  Defines data needed to perform flutter analysis. 
FREQ  Defines a set of frequencies to be used in the solution of frequency response
problems. Note: Defined using FREQi.

FREQ1  Defines a set of frequencies to be used in the solution of frequency response
problems by specification of a starting frequency, frequency increment, and the
number of increments desired. Note: Defined using FREQi.

FREQ2  Alternative form of frequency list. Defines a set of frequencies to be used
in the solution of frequency response problems by specification of a starting
frequency, final frequency, and the number of logarithmic increments
desired. Note: Defined using FREQi.

FREQ3  Frequency List, Alternate Form 3. Defines a set of frequencies for the modal
method of frequency response analysis by specifying the number of frequencies
between modal frequencies. Note: Defined using FREQi.

FREQ4  Frequency List, Alternate Form 4. Defines a set of frequencies for the modal
method of frequency response analysis by specifying the amount of "spread" around
each modal frequency and the number of equally spaced frequencies within the
spread. Note: Defined using FREQi.

FREQ5  Frequency List, Alternate Form 5. Defines a set of frequencies for the modal
method of frequency response analysis by specification of a frequency range and
fractions of the natural frequencies within that range. Note: Defined using
FREQi.

GRAV  Defines acceleration vectors for gravity or other acceleration loading 
GUST  Selects the gust field in an aeroelastic response problem. 
HYBDAMP  Defines a hybrid modal damping for direct dynamic solutions. 
LOAD  Defines a static load as a linear combination of load sets defined via FORCE, MOMENT, FORCE1, MOMENT1, FORCE2, MOMENT2, PLOAD, PLOAD1, PLOAD2, PLOAD4, PLOADX1, SLOAD, RFORCE, and GRAV entries. 
LSEQ  Defines a sequence of static load sets. 
MARCOUT  Selects output to be saved on the Marc t16 end/or t19 file(s) used in SOL 600 only. 
MFLUID  Defines the properties of an incompressible fluid volume for the purpose of generating a virtual mass matrix 
MKAERO1  Provides a table of Mach numbers (m) and reduced frequencies (k) for aerodynamic matrix calculation. 
MPCADD  Defines a multipoint constraint set as a union of multipoint constraint sets defined via MPC entries. 
NLAUTO  Defines parameters for automatic or fixed load/time stepping used in SOL 600 only. 
NLDAMP  Defines damping constants for nonlinear analysis when Marc is executed from SOL 600 only. 
NLPARM  Defines a set of parameters for nonlinear static analysis iteration strategy 
NLRGAP  Defines a nonlinear radial (circular) gap for transient response or nonlinear harmonic response. 
NLSTEP  Describes the control parameters for Mechanical, Thermal and Coupled Analysis in SOL 400 and for Linear Contact Analysis in SOL 101. 
NLSTRAT  Defines strategy parameters for nonlinear structural analysis used in SOL 600 only. 
NOLIN1  Defines a forcing function for transient responses or nonlinear harmonic responses. 
NSMADD  Defines non structural mass as the sum of the sets listed. 
NTHICK  Defines nodal thickness values for beams, plates and/or shells. 
RADCAV  Identifies the characteristics of each radiant enclosure. 
RANDPS  Defines load set power spectral density factors for use in random analysis having the frequency dependent form: ${S}_{jk}(F)=(X+iY)G(F)$ 
RFORCE  Defines a static loading condition due to an angular velocity and/or acceleration 
RLOAD1  Defines a frequencydependent dynamic load of the form: $\{P(f)\}=\left\{A\right\}[C(f)+iD(f)]{e}^{i\{02\pi f\tau \}}$ for use in frequency response problems 
RLOAD2  Defines a frequencydependent dynamic excitation of the form: $\{P(f)\}=\left\{A\right\}\cdot B(f){e}^{i\{\varphi (f)+02\pi f\tau \}}$ for use in frequency response problems 
RSPEC  Defines a directional combination method, modal combination method, excitation direction(s), response spectra and scale factors for response spectrum analysis. 
SPC1  Defines a singlepoint constraint, alternate form. 
SPCADD  Defines a singlepoint constraint set as a union of singlepoint constraint sets defined on SPC or SPC1 entries 
SPCR  Defines an enforced relative displacement value for a load step in SOL 400 and SOL 600. 
TABDMP1  Defines modal damping as a tabular function of natural frequency 
TABLED1  Defines a tabular function for use in generating frequencydependent and timedependent dynamic loads 
TABLED2  Defines a tabular function for use in generating frequencydependent and timedependent dynamic loads. Also contains parametric data for use with the table 
TABLED3  Defines a tabular function for use in generating frequencydependent and timedependent dynamic loads. Also contains parametric data for use with the table 
TABLED4  Defines the coefficients of a power series for use in generating frequencydependent and timedependent dynamic loads. Also contains parametric data for use with the table 
TABLEM1  Defines a tabular function for use in generating temperaturedependent material properties. 
TABLEM2  Defines a tabular function for use in generating temperaturedependent material properties. Also contains parametric data for use with the table. 
TABLEM3  Defines a tabular function for use in generating temperaturedependent material properties. Also contains parametric data for use with the table. 
TABLEM4  Defines coefficients of a power series for use in generating temperaturedependent material properties. Also contains parametric data for use with the table. 
TABLES1  Defines a tabular function for stressdependent material properties such as the stressstrain curve (MATS1 entry), creep parameters (CREEP entry) and hyperelastic material parameters (MATHP entry). 
TABLEST  Specifies the material property tables for nonlinear elastic temperaturedependent materials 
TABRND1  Defines power spectral density as a tabular function of frequency for use in random analysis. Referenced by the RANDPS entry. 
TEMPD  Defines a temperature value for all grid points of the structural model that have not been given a temperature on a TEMP entry. 
TIC  Defines values for the initial conditions of variables used in structural transient analysis. Both displacement and velocity values may be specified at independent degreesoffreedom. This entry may not be used for heat transfer analysis. 
TLOAD1  Defines a timedependent dynamic load or enforced motion of the form:
$\{P(t)\}=\{A\cdot F(t\tau )\}$
for use in transient response
analysis 
TLOAD2  Defines a timedependent dynamic excitation or enforced motion of the form:
$\{P(t)\}=\{\begin{array}{c}0\\ \left\{A\right\}{\tilde{t}}^{B}{e}^{C\tilde{t}}\mathrm{cos}(2\pi F\tilde{t}+P)\end{array}\begin{array}{c}\text{,}\\ \text{,}\end{array}\begin{array}{c}t(T1+\tau )\text{or}t(T2+\tau )\\ (T1+\tau )\le t\le (T2+\tau )\end{array}$
for use in a transient response problem, where:
$\tilde{t}=tT1\tau $

TRIM  Specifies constraints for aeroelastic trim variables. The SPLINE1 and SPLINE4 entries need to be here for the finite plate spline. 
TSTEP  Defines time step intervals at which a solution will be generated and output in transient analysis 
TSTEPNL  Defines parametric controls and data for nonlinear transient structural or heat transfer analysis. TSTEPNL is intended for SOLs 129, 159, and 99. 
UXVEC  Specification of a vector of aerodynamic control point (extra point) values. 
VIEW  Defines radiation cavity and shadowing for radiation view factor calculations. 
VIEW3D  Defines parameters to control and/or request the Gaussian Integration method of view factor calculation for a specified cavity. 
OptiStruct Cards
Specific load collectors are used for specialized loading cards, such as EIGRL, SPCADD, GRAV, RLOAD and DTABLEi. Specific load collectors have a card image which can be edited to group other load collectors together for simultaneous application in a single subcase, or to provide special information for a specific analysis type, such as modal analysis.
General boundary conditions, such as loads and constraints, should not be collected into specific load collectors. Organizing loads and constraints into a specific load collector may result in an error termination.
Card  Description 

ACSRCE  Defines acoustic source as a function of power vs.
frequency. Note: Bulk
Data Entry

CDSMETH  Can be used in the component dynamic synthesis method for
generating component dynamic matrices at each loading frequency. Note: Bulk Data
Entry

CMSMETH  Defines the CMS (Component Mode Synthesis) method,
frequency upper limit, number of modes, and starting SPOINT ID to
be used in a CMS solution. The eigenvalue solver is also specified. In addition,
preload as well as loads for reduction and residual vector generation can be
defined. Also, an ASCII file containing
CELAS4 and CDAMP3 element data and/or their
corresponding design variable definitions can be generated for
DMIG to allow the use of the component modes in optimization
runs. Note: Bulk
Data Entry

CNTSTB  Defines parameters for stabilization control of
surfacetosurface contact and large displacement nodetosurface contact. A
CNTSTB Bulk Data Entry should be referenced by a
CNTSTB Subcase Information entry to be applied in a particular
subcase. Note: Bulk
Data Entry
A CNTSTB Bulk Data Entry should be referenced by a CNTSTB Subcase Information entry to be applied in a particular subcase. 
DLOAD  Defines a dynamic loading condition for frequency response
problems as a linear combination of load sets defined via RLOAD1
and RLOAD2 entries, or for transient problems as a linear
combination of load sets defined via TLOAD1 and
TLOAD2 entries, or acoustic source ACSRCE
entries. Note: Bulk
Data Entry

DTI, SPECSEL  Correlates spectra lines specified on
TABLED1 entries with damping values. Note: Bulk
Data Entry

EIGC  Defines data required to perform complex eigenvalue
analysis. Note: Bulk
Data Entry

EIGRA  Defines the data required to perform real eigenvalue
analysis with the Automated MultiLevel Substructuring technique. Note: Bulk
Data Entry

EIGRD  Defines data required to perform eigenvalue extraction
using the Lapackbased dense solver. Note: Bulk Data Entry

EIGRL  Defines data required to perform real eigenvalue analysis
(vibration or buckling) with the Lanczos Method. Note: Bulk
Data Entry

FATDEF  Defines elements, and associated fatigue properties, for
consideration in a fatigue analysis. Note: Bulk
Data Entry

FATEVNT  Defines loading events for fatigue analysis. Note: Bulk
Data Entry

FATLOAD  Defines fatigue loading parameters. Note: Bulk
Data Entry

FATMCRV  Specifies the corresponding quantities (Ti) vs SN curve
table ID’s via TABLEXN entries (TIDi). Note: Bulk Data Entry

FATPARM  Used to define parameters required for a Fatigue
Analysis. Note: Bulk
Data Entry

FATSEAM  Defines parameters and property identification data for
Seam Weld Fatigue Analysis. Note: Bulk Data Entry

FATSEQ  Defines a loading sequence for a Fatigue
Analysis. Note: Bulk
Data Entry

FLLWER  Define parameters for the calculation of loads dependent
on deformation. Two type of loads, pressure load (only PLOAD4
Bulk Data Entries) and concentrated force (only
FORCE1/FORCE2 Bulk Data Entries) can use
this entry to control the options for Follower Loads. Note: Bulk
Data Entry

FREQ  Defines a set of frequencies to be used in the solution of
frequency response problems. Note: Bulk
Data Entry

FREQ1  Defines a set of frequencies to be used in the solution of
frequency response problems by specification of a starting frequency, frequency
increment, and the number of increments desired. Note: Bulk
Data Entry
Defined using FREQi. 
FREQ2  Defines a set of frequencies to be used in the solution of
frequency response problems by specification of a starting frequency, final
frequency, and the number of logarithmic increments desired. Note: Bulk
Data Entry
Defined using FREQi. 
FREQ3  Defines a set of frequencies for the modal method of
frequency response analysis by specifying the number of frequencies between modal
frequencies. Note: Bulk
Data Entry
Defined using FREQi. 
FREQ4  Defines a set of frequencies for the modal method of
frequency response analysis by specifying the amount of "spread" around each modal
frequency and the number of equally spaced frequencies within the spread. Note: Bulk
Data Entry
Defined using FREQi. 
FREQ5  Defines a set of frequencies for the modal method of
frequency response analysis by specification of a frequency range and fractions of
the natural frequencies within that range. Note: Bulk
Data Entry
Defined using FREQi. 
FSI  Identifies a FSI Bulk Data Entry to run FluidStructure
Interaction Analysis with Altair AcuSolve for a Linear
Transient Heat Transfer Subcase or Nonlinear Direct Transient Analysis
Subcase. Note: Bulk
Data Entry

GRAV  Defines the gravity vectors for use in determining gravity
loading for the static structural model. It can also be used to define the
EXCITEID field (Amplitude "A") of dynamic loads in
RLOAD1, RLOAD2, TLOAD1,
TLOAD2 and NLOAD1 Bulk Data Entries for
dynamic solution sequences. Note: Bulk
Data Entry

HYBDAMP  This Bulk Data Entry defines the application of modal
damping to the residual structure in a Direct Transient or Frequency Response
analysis. Note: Bulk
Data Entry

INVELB  Defines initial velocity in a multibody
situation. Note: Bulk
Data Entry

LOAD  The LOAD is equivalent to the
LOADADD. Note: Bulk
Data Entry

LOADJG  Defines loading for joint connector JOINTG Bulk Data
Entry. Note: Bulk Data Entry

MBACT  Defines the entity/set that needs to be activated in the
multibody system for the subsequent simulation. Note: Bulk
Data Entry

MBDEACT  Defines the entity/set that needs to be deactivated in
the multibody system for the subsequent simulation. Note: Bulk
Data Entry

MBLIN  Defines the parameters for a multibody system linear
analysis. Note: Bulk
Data Entry

MBREQ  Defines a multibody as a combination of request sets
defined via MBREQE and MBREQM. Note: Bulk
Data Entry

MBREQE  Defines a multibody solver output request to output the
results of a set of expressions. Note: Bulk
Data Entry

MBREQM  Defines a multibody solver output request to output
displacement, velocity, acceleration, or force with respect to markers. Note: Bulk
Data Entry

MBSEQ  Defines the simulation sequence for the multibody
solver. Note: Bulk
Data Entry

MBSIM  Defines the parameters for a multibody
simulation. Note: Bulk
Data Entry

MBSIMP  Defines the simulation parameters for subsequent multibody
simulation. Note: Bulk
Data Entry

MBVAR  Defines a multibody solver variable which can be referred
to by multiple expressions. Note: Bulk
Data Entry

MFLUID  Selects the MFLUID Bulk Data entries to be used to specify
the fluidstructure interface Note: Bulk
Data Entry

MLOAD  Defines a multibody as a linear combination of load sets
defined via GRAV, MBFRC,
MBFRCC, MBFRCE, MBMNT,
MBMNTC, MBMNTE, MBSFRC,
MBSFRCC, MBSFRCE, MBSMNT,
MBSMNTC, and MBSMNTE. Note: Bulk
Data Entry

MOTION  Defines a multibody as a combination of motion sets
defined via MOTNJ, MOTNJC,
MOTNJE, MOTNG, MOTNGC,
and MOTNGE. Note: Bulk
Data Entry

MOTNJG  Defines motion for joint connector JOINTG Bulk Data
Entry. Note: Bulk Data Entry

MPCADD  Defines a multipoint constraint set as a union of
multipoint constraint sets defined via MPC entries. Note: Bulk
Data Entry

NLADAPT  The NLADAPT Bulk Data Entry defines
parameters for timestepping and convergence criteria in Nonlinear
Analysis. Note: Bulk
Data Entry
Refers to Subcase information entry NLADAPT. 
NLMON  Defines the settings for runtime monitoring of nonlinear
analysis. Note: Bulk Data Entry

NLOAD  Defines a loading condition for nonlinear problems as a
linear combination of load sets defined via NLOAD1. Note: Bulk
Data Entry

NLOAD1  Defines a timedependent load or enforced motion for use
in geometric nonlinear analysis. Note: Bulk
Data Entry

NLOUT  Defines incremental result output parameters for small
displacement nonlinear analysis and large displacement analysis. Note: Bulk
Data Entry
Refers to Subcase information entry NLOUT. 
NLPARM  Defines parameters for Nonlinear Static Analysis,
Nonlinear Direct Transient Analysis, and Heat Transfer Analysis solution
control. Note: Bulk
Data Entry

NLPARMX  Defines additional parameters for geometric nonlinear
implicit static analysis. Note: Bulk
Data Entry

NOLIN1  Defines nonlinear transient forcing functions of the form:
Pi(t)=S⋅T(uj(t)) (Function of displacement) and
Pi(t)=S⋅T(˙uj(t)) (Function of velocity),
where, uj(t) and ˙uj(t) are the displacement and velocity at point GJ in the
direction of CJ. For more information, please refer to the OptiStruct Solver documentation. Note: Bulk Data Entry

NOLIN2  Defines nonlinear transient forcing functions of the form:
Pi(t)=S⋅Xj(t)⋅Xk(t), where, Xj(t) and Xk(t) can
be either displacement or velocity at points GJ and GK, respectively, in the
directions of CJ and CK, respectively. For more information, please refer to the
OptiStruct Solver documentation. Note: Bulk Data Entry

NOLIN3  Defines nonlinear transient forcing functions of the form:
P_{i}(t)={S⋅[X_{j}(t)]_{A},Xj(t)>00,X_{j}(t)≤0,
where, X_{j}(t) may be a displacement or a velocity at point GJ in the
direction of CJ. For more information, please refer to the OptiStruct Solver documentation. Note: Bulk Data Entry

NOLIN4  Defines nonlinear transient forcing functions of the form:
P_{i}(t)={−S⋅[−X_{j}(t)]_{A},X_{j}(t)>00,X_{j}(t)≤0,
where, X_{j}(t) may be a displacement or a velocity at point GJ in the
direction of CJ. For more information, please refer to the OptiStruct Solver documentation. Note: Bulk Data Entry

NSGEADD  Defines nonstructural material damping as the sum of the
sets listed Note: Bulk Data Entry

NSMADD  Defines nonstructural mass as the sum of the sets
listed. Note: Bulk
Data Entry

PEAKOUT  Defines criteria used for the automatic identification of
loading frequencies at which result peaks occur. Other result output may then be
requested at these "peak" loading frequencies. This feature is only supported for
frequency response solution sequences. Note: Bulk
Data Entry

PFAT  Defines element properties for fatigue analysis. Note: Bulk
Data Entry

PFPATH  Defines a onestep transfer path analysis. Note: Bulk
Data Entry

PTADD  Defines a pretension load as a linear combination of load
sets defined via PTFORCE, PTFORC1,
PTADJST and PTADJS1 entries. Note: Bulk
Data Entry

RANDPS  Defines load set power spectral density factors for use in
random analysis having the frequency dependent form S_{jk}
(F) = (X + iY) G(F). Note: Bulk
Data Entry

RFORCE  Defines a static loading condition due to a centrifugal
force field. It can also be used to define the EXCITEID field
(Amplitude "A") of dynamic loads in RLOAD1,
RLOAD2, TLOAD1 and TLOAD2
Bulk Data Entries. RFORCE is used as a linear deadload in Large
Displacement Nonlinear Analysis. Note: Bulk
Data Entry

RGYRO  Includes data required to perform Rotor Dynamics analysis
in Modal Frequency Response Analysis and/or Modal Complex Eigenvalue Analysis. The
RGYRO Bulk Data Entry is referenced by a corresponding
RGYRO Subcase Information Entry in a specific
subcase. Note: Bulk
Data Entry

RLOAD1  Defines a frequencydependent dynamic load of the form:
$\mathbf{f}\left(\Omega \right)=A\left(C\left(\Omega \right)+iD\left(\Omega \right)\right){e}^{i\left(\theta 2\pi \Omega \tau \right)}$
for use in frequency response problems.
RLOAD1 (Form 1) can be used when the frequencydependent
dynamic load input is available in real/imaginary number format. Note: Bulk
Data Entry

RLOAD2  Defines a frequencydependent dynamic load of the form
$\mathbf{f}\left(\Omega \right)=A*B\left(\Omega \right){e}^{i\left(\varphi \left(\Omega \right)+\theta 2\pi \Omega \tau \right)}$
for use in frequency response problems.
RLOAD2 (Form 2) can be used when the frequencydependent
dynamic load input is available in magnitude/phase number format. Note: Bulk
Data Entry

RSPEC  Specifies directional combination method, modal combination
method, excitation direction(s), response spectra and scale factors. Note: Bulk
Data Entry

RSPEED  Specifies a set of reference rotor speed values for
asynchronous analysis in Rotor Dynamics. Note: Bulk
Data Entry

SOLVTYP  Defines the solver type to be used for static, dynamic
analysis and geometric nonlinear implicit analysis. Note: Bulk
Data Entry

SPCADD  Defines a singlepoint constraint set as a union of
singlepoint constraint sets defined via SPC or
SPC1 entries. Note: Bulk
Data Entry

TABDMP1  Defines modal damping as a tabular function of natural
frequency. Note: Bulk
Data Entry

TABFAT  Defines y values of each point on the loading time
history. Note: Bulk
Data Entry

TABLED1  Defines a tabular function for use in generating
frequencydependent and timedependent dynamic loads. Note: Bulk
Data Entry

TABLED2  Defines a tabular function for use in generating
frequencydependent and timedependent dynamic loads. Also contains parametric data
for use with the table. Note: Bulk
Data Entry

TABLED3  Defines a tabular function for use in generating
frequencydependent and timedependent dynamic loads. Also contains parametric data
for use with the table. Note: Bulk
Data Entry

TABLED4  Defines the coefficients of a power series for use in
generating frequencydependent and timedependent dynamic loads. Also contains
parametric data for use with the table. Note: Bulk
Data Entry

TABLEG  Defines a general tabular function for use in supported
reference entries. Note: Bulk Data Entry

TABLEM1  Defines a tabular function for use in generating
temperaturedependent material properties. Note: Bulk
Data Entry

TABLEM2  Defines a tabular function for use in generating
temperaturedependent material properties. Also contains parametric data for use
with the table. Note: Bulk
Data Entry

TABLEM3  Defines a tabular function for use in generating
temperaturedependent material properties. Also contains parametric data for use
with the table. Note: Bulk
Data Entry

TABLEM4  Defines coefficients of a power series for use in
generating temperaturedependent material properties. Also contains parametric data
for use with the table. Note: Bulk
Data Entry

TABLEMD  Defines a multidimensional tabular function which
identifies single or multiple Xvalues for a single Yvalue. Note: Bulk Data Entry

TABLES1  Defines a tabular function for use as stressstrain curve
in elastoplastic material properties MATS1,
MATX33, MATX65, MATHF, as
well as material curve in nonlinear material properties MATX36,
MATX42, and MATX70. The
TABLES1 entry can also be used to define the corresponding
material curves on the MATHE Bulk Data Entry. Note: Bulk
Data Entry

TABLEST  Specifies the material property tables for
elastoplastic, temperaturedependent materials. Note: Bulk
Data Entry

TABLEXN  Defines a tabular function for Stress (X)  Life (Y)
pairs to define an SN curve. Note: Bulk Data Entry

TABRND1  Defines power spectral density as a tabular function of
frequency for use in random analysis. Referenced on the RANDPS
entry. Note: Bulk
Data Entry

TEMPD  Defines a temperature value for all grid points of the
structural model that have not been given a temperature on a TEMP
entry. Note: Bulk
Data Entry

TICA  Defines values for the initial velocity of a set of grids
along and about an axis for explicit analysis. Note: Bulk
Data Entry

TLOAD1  Defines a timedependent dynamic load or enforced motion.
Note: Bulk
Data Entry

TLOAD2  Defines a timedependent dynamic excitation or enforced
motion. Note: Bulk
Data Entry

TSTEP  Defines time step parameters for control and intervals at
which a solution will be generated and output in transient analysis. Note: Bulk
Data Entry

TSTEPNL  Defines parameters for geometric nonlinear implicit
dynamic analysis strategy. Note: Bulk
Data Entry

TSTEPNX  Defines additional parameters for geometric nonlinear
implicit dynamic analysis. Note: Bulk
Data Entry

UNBALNC  Defines the unbalanced rotating load during a rotor
dynamic analysis in Frequency Response solution sequences. The unbalanced load is
specified in a cylindrical system where the rotor rotation axis is the
Zaxis. Note: Bulk
Data Entry

XHISADD  Defines a time history output set as a union of time
history outputs defined via XHIST entries. Note: Bulk
Data Entry

XSTEP  Defines explicit analysis control. Note: Bulk
Data Entry

PAMCRASH Cards
Card  Description 

ACC3D /  Imposed translational accelerations Note: Keyword input

ACFLD /  Acceleration field Note: Keyword input

ACTUA /  Joint Actuator Note: Keyword input

BDFOR /  Body force cards Note: Keyword input

BDFOR / AFIELD  Body force cards, KEYWORD = AFIELD: Acceleration field Note: Keyword
input

BDFOR / VOLUME  Body force cards, KEYWORD = AFIELD: VOLUME: volumetric force Note: Keyword
input

BDFOR / INPRES  Body force cards, KEYWORD = INPRES: Imposed pressure body force
type Note: Keyword input

BDFOR / RADIAL  Body force cards, KEYWORD = RADIAL: Centrifugal force arisen from angular
velocity Note: Keyword input

BDFOR / ROTACC  Body force cards, KEYWORD = ROTACC: Centrifugal force arisen from angular
acceleration Note: Keyword input

BDFOR / PRSTRS  Body force cards, KEYWORD = PRSTRS: Bolt preload stress Note: Keyword
input

BDFOR / PRFORC  Body force cards, KEYWORD = PRFORC: Bolt preload force Note: Keyword
input

BDFOR /PREND  Body force cards, KEYWORD = PREND: Bolt preload end (Implicit
only) Note: Keyword input

BOUNC /  Displacement Boundary Condition (Constraints) Note: Keyword
input

CONLO /  Concentrated nodal load, force or moment vs. time or frequency Note: Keyword
input

DAMP /  Nodal damping group (TimeControlled Activation and SensorControlled
Activation) Note: Keyword input

DIS3D /  Imposed translational displacement Note: Keyword input

DIS3DM /  Imposed minimum translational displacement Note: Keyword input

DIS3DX /  Imposed maximum translational displacement Note: Keyword input

INTEM /  Initial temperature, one or several nodes Note: Keyword input

INVEL /  Initial velocity definition, one or several nodes Note: Keyword
input

PFSURF /  Porous flow exchange surface Note: Keyword input

PREFA /  Pressure boundary condition on solid, tetrahedral, shell and membrane
elements Note: Keyword input

PREBM /  Pressure boundary condition on beams Note: Keyword input

RAC3D /  Imposed rotational acceleration Note: Keyword input

RAN3D /  Imposed rotational displacement Note: Keyword input

RAN3DM  Imposed minimum angular displacement Note: Keyword input

RAN3DX /  Imposed maximum angular displacement Note: Keyword input

RDA3D /  RDA3D Note: Keyword input

RDD3D /  RDD3D Note: Keyword input

RDV3D /  RDV3D Note: Keyword input

RVE3D /  Imposed rotational velocities Note: Keyword input

TEMBC /  Imposed temperature Note: Keyword input

VEL3D /  Imposed velocities Note: Keyword input

Permas Cards
Card  Description 

$ADDMODES  Definition of static mode shapes to be added to the set of eigenmodes used
for transformation to modal space. Note: Available as a load collector when the
source = loads.
To change the LPAT = field, set the AddmodeLoads toggle to LOADSELECT, which ensures that each data line will define different ADDMODES. In the NoOfLoads_AddMode = field, enter the number of load patterns to assign the ADDMODES to. 
$CONTVAL  Assignment of properties to contacts referenced by contact identifier or
name. Note: Supported as a load collector (card image
LOADS). To create a card, use an existing load collector or create a new one
with card image LOADS and select the CONTVAL check box.
A maximum number of 5 keywords are allowed per load collector (load pattern). 
$PRETENSION LOAD  Assignment of load properties to pretension threads/areas referenced by
identifier or name. Note: Supported as a load collector (card image LOADS). To create a card, use an existing load
collector or create a new one with card image LOADS and select the PRETENSION
checkbox.

$SUPPRESS  Definition of suppressed degrees of freedom. The degrees of freedom given on the header line are suppressed for all nodes listed within the data block. 
Radioss Cards
Card  Description 

/ACTIV  Describes the deactivation/activation of element
groups. Note: Block
Format Keyword

/SPH/INOUT  Describes the SPH inlet/outlet conditions. Note: Block
Format Keyword
