2021
This manual provides a detailed list of all the input keywords and options available in Radioss.
This manual provides a list of all the solution definition keywords and options available in Radioss.
Engine Keyword In this group keywords are used for implicit solution. Different implicit solver methods (linear, nonlinear, buckling or quasi-static), different options to control the implicit computation, different implicit time step method and implicit output messages are introduced.
Engine Keyword
View new features for Radioss 2021.
Radioss® is a leading explicit finite element solver for crash and impact simulation.
Discover Radioss functionality with interactive tutorials.
This manual provides details on the features, functionality, and simulation methods available in Altair Radioss.
Radioss format 2021 uses the 12x extension format.
This format allows running either Starter or Engine with the same file.
New and modified features in Radioss.
This manual provides a list of all the model definition keywords and options available in Radioss.
Engine Keyword In this group of keywords are used to generally define the output style, control of computation, damping and ALE setup during the computation.
Engine Keyword In this group, keywords are used for modification (deletion or add options) in Engine.
Generates animation files containing results according to the keywords specified. The keywords are specified in the topics within Animation and Post-processing Output Files.
Engine Keyword A zero stiffness DOF will be constrained automatically.
Engine Keyword Divergence criterion with successive increasing residual number for nonlinear analysis.
Engine Keyword Describes the implicit dynamics with α-HHT method.
Engine Keyword Describes the implicit dynamics with a general Newmark method.
Engine Keyword Rayleigh structure damping with dynamic implicit analysis.
Engine Keyword Defines the settings for Fluid Structure Interaction Analysis with AcuSolve.
Engine Keyword Geometrical stiffness matrix will not be used for implicit nonlinear calculation.
Engine Keyword Describes the stiffness matrix; due to contact interfaces will be assembled completely.
Engine Keyword Defines including some contact nonlinearities in PCG linear solver.
Engine Keyword Implicit linear analysis will take into account contact interfaces.
Engine Keyword Deactivating line search for nonlinear analysis.
Engine Keyword Line search methods for nonlinear analysis.
Engine Keyword Describes the stiffness of gas in monitored volume type 3 (tire modeling).
Engine Keyword The computation will be stopped, if Ncy_max is reached.
Engine Keyword Describes the implicit option for pre-conditioning.
Engine Keyword Deactivating load (pressure) stiffness matrix.
Engine Keyword Different reference force residual computations used for stop criteria on nonlinear analysis with contact.
Engine Keyword Define reference force residual limit values used in stop criteria for implicit nonlinear.
Engine Keyword Deactivation reference residual option and using the previous one in stop criteria for implicit nonlinear analysis.
Engine Keyword Describes the message level for BCS (Boeing) solver.
Engine Keyword Reordering method definition for BCS.
Engine Keyword BCS solver will use minimum in-core memory.
Engine Keyword The full projection of QEPH shell element for warped elements will be deactivated to keep consistency between the stiffness matrix and the internal force computations.
Engine Keyword The full projection of QEPH shell element for warped elements will be activated for stiffness matrix to keep consistency with the internal force computations.
Engine Keyword Describes the initial stresses that will be imposed gradually.
Engine Keyword Implicit spring-back will be run in this session.
Engine Keyword Describes the linear or nonlinear stiffness choices for nonlinear spring in implicit nonlinear analysis.
Engine Keyword In this group, keywords are used to define the kinematic condition (constrain/release rotation or translation DOF) and initial condition (rotational/translational velocity).
Engine Keyword In this group, keywords are used to define different time step control (STOP, KILL, CST or DEL, etc.) for different entities (shell, brick, beam, airbag, interface, etc.) during the computation.
Engine Keyword In this group, keywords are used to output different info (like stress, strain, orthotropy direction, temperature, etc.) in state file (STA-File).
Engine Keyword Keywords that are still supported, but no longer maintained (*) are considered obsolete.
This manual contains an alphabetical list of LS-DYNA input files available in Radioss.
Optimization Keyword This manual contains the description of the keywords for the Radioss optimization. This manual is compatible with the version 2018 of Radioss.
This manual contains the description of the Keywords for the Radioss Multi-Domain.
This manual presents examples solved using Radioss with regard to common problem types.
This manual presents solved verification models.
This section provides quick responses to typical and frequently asked questions regarding Radioss.
This manual provides detailed information about the theory used in the Altair Radioss Solver.
This manual describes the interface between Altair Radioss and a user’s subroutines.
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