Radioss

Altair Radioss is a multidisciplinary finite element solver developed by Altair Engineering.^[1] It includes implicit and explicit time integration schemes for the solution of engineering problems, from [[linear] statics and linear dynamics to non-linear transient dynamics and mechanical systems. The multidisciplinary solver has its main strengths in durability, NVH, crash, safety, manufacturability, and fluid-structure interaction.

RADIOSS
Developer(s)	Altair Engineering, open source
Operating system	Linux and Microsoft Windows
Type	FEM software
License	proprietary (Altair Radioss), proprietary (OpenRadioss)
Website	www.altair.com/radioss/ www.openradioss.org

Since the 2021 release, Radioss has supported input in the LS-DYNA input format as well as the Radioss 'Block' Format ^[2]

OpenRadioss, a source available software version of Radioss, sharing the capabilities, input and output formats of Altair Radioss, was released on September the 8th 2022. Despite being called open source software,^[3] the software cannot be compiled or used without a library that is provided only in binary form, and for which third parties are granted "limited permission to use".

Disciplines

• Linear static analysis
• Non-linear explicit dynamic analysis
• Non-linear implicit quasi-static analysis
• Normal modes analysis for real and complex eigenvalues
• Linear buckling analysis
• Frequency response analysis
• Random response analysis
• Linear transient response analysis
• Linear coupled fluid-structure (acoustic) analysis
• Linear steady-state heat transfer analysis coupled with static analysis
• Explicit Arbitrary Eulerian-Lagrangian (ALE) formulation
• Explicit Computational Fluid Dynamics (CFD)
• Smoothed-particle hydrodynamics (SPH)
• One-step (inverse) and incremental sheet metal stamping analysis