SimSolid structural simulation for CAD assemblies

Analyze full assemblies straight from CAD, without simplifying geometry or building a mesh. Results arrive in seconds to minutes, so you can test more design options.

Simcenter SimSolid structural result on a CAD assembly

How SimSolid is different

Traditional FEA needs geometry simplification and meshing before the first result. SimSolid skips both.

No meshing
SimSolid works on the CAD geometry itself. Its engine extends the finite element method with external approximations, with degrees of freedom tied to volumes and surfaces instead of mesh nodes.
No geometry simplification
Small holes, fillets and bosses can stay in the model. CAD with small gaps or overlaps between parts can still be analyzed.
Full assemblies on a desktop
Assemblies with hundreds to thousands of parts run on a standard laptop or desktop PC.
Adaptive accuracy
Several solution passes with error estimation refine the result automatically.
SimSolid analysis types
SimSolid analysis types Image: Siemens Digital Industries Software
SimSolid connections and materials
SimSolid connections and materials Image: Siemens Digital Industries Software
SimSolid results and visualization
SimSolid results and visualization Image: Siemens Digital Industries Software

Analysis types

  • Linear static
  • Nonlinear static
  • Modal
  • Linear buckling
  • Frequency response
  • Transient
  • Random response
  • Thermal and thermal-stress
  • Inertia relief
  • Fatigue
  • Composites
  • Squeak and rattle

Assemblies and connections

Contacts between parts are detected automatically. Bolts, spot and seam welds, bonded and sliding contacts can be defined between parts, so a welded frame or bolted machine can be analyzed as one assembly.

Application areas

Machinery and equipment
Frames, bases and housings of industrial machines.
Automotive
Components, brackets and sub-assemblies.
Welded steel structures
Frames, racks and fabricated structures.
Early design checks
Designers check stiffness and stress while the CAD is still changing.

Engineering benefits

Answers during design
Check a design change the same day, not after a meshing job.
Less pre-processing
No defeaturing, no mesh, no mesh convergence study.
More options tested
Fast runs make it practical to compare many variants.
Works with your CAD
Import geometry from common CAD formats.

About the name

Part of Siemens

SimSolid was developed by Altair, which became part of Siemens in 2025.

New product name

SimSolid is now called Simcenter SimSolid. The technology is the same.

Product information from public sources by Altair, a Siemens business.

Talk to a Softprint engineer about SimSolid

See also HyperWorks · ThinkDesign · Inspire Form · InsightPro.