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Welcome
What's New
View new features for SimSolid 2025.
Get Started
Learn the basics and discover the workspace.
Tutorials
Discover SimSolid functionality with interactive tutorials.
Interface with External Products
Interfaces that support SimSolid output file format.
Geometry
Information about treatment and properties of geometric entities in SimSolid.
Assembly
Summary of available functionality for defining the properties and behavior of parts in the model.
Connections
Connections are used to define the association of different regions of interest between parts in an assembly.
Create Analysis
Create an analysis for your project.
- Structural
- Modal
  - Modal Analysis
    Modal analysis evaluates the frequencies and corresponding modes of vibration of your model.
  - Modal Prestressed
- Dynamics
  Evaluate your design in real-time using SimSolid dynamics analysis.
- Thermal
  Thermal analysis predicts how thermal effects propagate through the model. Steady state and thermal transient analyses are supported.
- Fatigue
  Fatigue analysis is intended for predicting life of structures under cyclic loading.
- Supported Analysis Combinations
Boundary Conditions
Boundary Conditions available for SimSolid.
Post Processing
Run analyses and view a variety of results in SimSolid.
Design Study
Design studies allow you to quickly evaluate and compare the structural performance from different design scenarios.
Verification Problems
Solved verification models.
Frequently Asked Questions
This section provides quick responses to typical and frequently asked questions regarding

Modal Prestressed

Prestressed eigenvalue analysis is governed by:

$(\bar{K} + λM) A = 0$

Where,

$\bar{K}$: Prestress stiffness matrix
$M$: Mass matrix
$A$: Eigenvector
$λ$: Eigenvalues

Prestressed loadcases can be either linear or non-linear. All non-linearity types are supported.

Depending on preloading conditions, the resulting effect could be a weakened or stiffened structure.

If the preloading is compressive, it typically has a weakening effect on the structure (for example, column or pillar under compressive preloading).
If the preloading is tensile, it typically has a stiffening effect (for example, rotorcraft blade under centrifugal preloading).