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Boundary Conditions
Boundary Conditions available for SimSolid.
Virtual Spring Support
Create a virtual spring support with finite stiffness and spring force between two different parts or between a single part and ground. Springs can be applied on both faces and spots.

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Boundary Conditions
Boundary Conditions available for SimSolid.
- Available Boundary Conditions for Analyses
  A comparison chart showing the available boundary conditions for each analysis type.
- Immovable Constraints
  Enforce zero translational displacements in all directions on faces, edges, vertexes, and/or spots.
- Slider Constraints
  Enforce zero displacement in normal to the surface direction on faces and areal spots.
- Hinge Constraints
  Connect faces or spots to a ground support.
- Spring Support
  Set an elastic foundation at selected faces.
- Virtual Spring Support
  Create a virtual spring support with finite stiffness and spring force between two different parts or between a single part and ground. Springs can be applied on both faces and spots.
- General Constraints
  Constrain displacement of faces, edges, vertices, or spots in Modal analysis.
- Alignment Constraints
- Cable Tightening/Rod Preload
  Apply shortening or change of length for cables/rods.
- Pressure
  Apply positive pressure towards a face or negative pressure outwards from a face.
- Force/Displacement
  Apply uniform loads and/or displacements to faces, edges, vertices, or spots.
- Gravity Load
  Simulate the force of gravity as it affects your model.
- Translational Inertia Load
  Apply a uniformly distributed translational inertia load over the volumes of the parts in an assembly.
- Rotational Inertia Load
  Apply a uniformly distributed rotational inertia load over the volumes of the parts in an assembly.
- Inertia Relief
  Simulate deformations and stresses in cases where you have an unconstrained structure to which an active load is suddenly applied.
- Remote Load
  Apply distributed loads (tractions) to faces, general virtual connector, or spots that are statistically equivalent to a load applied on a single point.
- Remote Displacement
  Apply displacements to faces and/or spots that are statistically equivalent to a load applied on a single point.
- Thermal Load
  Simulate deformations and stresses induced by the temperature changes in your model.
- Bearing Load
  Apply a varying pressure load to full or partial face(s) of revolution.
- Hydrostatic Pressure
  Define pressure exerted by a fluid at equilibrium.
- Distributed Mass
  Apply distributed mass across selected faces.
- Bolt/Nut Tightening Loads
  Available for blind bolts (bolt without a nut), bolt with nut/bolt on threaded rod, nut on generic post or handle.
- Base Excitation
- Volume Expansion/Shrinkage
  Apply volumetric expansion/shrinkage coefficient over seam welds or other parts in the assembly.
- Temperature
  In thermal analysis, limit temperature on the selected faces, edges, vertices, or spots to a prescribed value.
- Thermal Convection
  In thermal analysis, define a convective heat exchange condition on faces and spots.
- Surface Heat Flux
  In thermal analysis, apply uniformly distributed heat loads to faces and spots.
- Volume Heat Loads
  In thermal analysis, simulate internal heat generation and internal heat absorption in volumes.
- Solar Loads
  Apply heat loads based on the sunbeam’s direction for thermal analysis
- Wind Loads
  Theory of wind load
Post Processing
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Frequently Asked Questions
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Virtual Spring Support

Create a virtual spring support with finite stiffness and spring force between two different parts or between a single part and ground. Springs can be applied on both faces and spots.

In the Project Tree, open the Analysis Workbench.
In the Analysis Workbench, select Spring.

For Type, select Spring or Ground spring.

Type	Do this
Spring	Select End1, and then select the faces or spots of one part. Repeat for End2. Note: Multiple faces or spots that belong to a single part can be selected for each end. The Check COG option is activated by default. Uncheck the option to manually change the coordinates of each end.
Ground spring	Select End1, and then select the faces or spots of one part. Switch to Ground and then enter the coordinates of the ground point.

Define Stiffness and Force.
Click Apply.
The spring will appear in the Loads and constraints branch. If selected, the vectors representing the spring in the modeling window will appear.