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 Euler buckling modes will be computed.
Engine Keyword Euler buckling modes will be computed based on actual pre-stress stat.
Engine Keyword Change the maximum number of BFGS quasi-Newton method for implicit nonlinear.
Engine Keyword Linear implicit solution will be computed.
Engine Keyword Due to some linearization used in geometrical nonlinear analysis, small time step has to be chosen to avoid accumulated errors under large rotation. In this case, this option improves the accuracy using usual time step.
Engine Keyword Nonlinear implicit methods.
Engine Keyword Only small displacement effects will be considered with this option.
Engine Keyword Output global solve information at each solving iteration.
Engine Keyword Quasi-static implicit solution will be computed.
Engine Keyword Quasi-static implicit solution with a factor for inertia stiffness matrix.
Engine Keyword Rigid motion has been removed or minimized from quasi-static implicit solution.
Engine Keyword Selects linear solver.
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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