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Boundary Conditions
Boundary Conditions available for SimSolid.
Constraints
Grounded Bushing Support
Type of connection used to constrain a part to the ground

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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.
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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.
- Constraints
  - Immovable Support
    Enforce zero translational displacements in all directions on faces, edges, vertices, and/or spots.
  - Slider Support
    Enforce zero displacement in normal to the surface direction on faces and areal spots.
  - Hinge (Pivot) Support
    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.
  - Grounded Bushing Support
    Type of connection used to constrain a part to the ground
  - Cable/Rod
    Combines the functionality of creating virtual cables or rods with the ability to apply change in length
  - Shock Absorber
    Used to simulate damping and stiffness behavior in assemblies
  - General Constraints
    Constrain displacement of faces, edges, vertices, or spots in Modal analysis.
  - Alignment Constraints
- Pressure
- 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.
- 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
- Perfect Electric Conductor (PEC)
  Apply perfect electric conductor condition to faces.
- Waveguide Port
  Specify the excitation planes in waveguide structures.
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Verification Problems
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Frequently Asked Questions
This section provides quick responses to typical and frequently asked questions regarding

Grounded Bushing Support

Type of connection used to constrain a part to the ground

Unlike a regular bushing that connects two parts, a grounded bushing provides stiffness, damping, and inertial properties between a single part on an assembly and a fixed, external reference (the ground). This is useful when modeling complex supports or foundations that exhibit flexibility, damping, or mass characteristics. The grounded bushing can be applied to faces or spots on a part.

Create

In the Project Tree, select an analysis subcase (structural, modal or structural multi-loadcases) to open the Analysis workbench.
In the Analysis Workbench, select Constraints > Grounded bushing support.
Under Apply to, select the Face or Spot radio buttons.
If Spot is selected, new spots can be created by clicking Create new spot.

Once the face or spot is selected, define the bushing's properties.

Define

In the Coordinate system tab, define the following.
1. By default, Origin is set at the center of gravity (COG) of the selected entity. To manually define the origin, uncheck the Set in COG checkbox and enter the desired X, Y, and Z coordinates.
2. Select the axis that will define the orientation of the bushing's stiffness, inertia, and damping properties. Then specify the X, Y, and Z direction vectors for this axis.
Go to the Stiffness tab and define the following.
1. Input values for the Linear X, Y, and Z translational stiffness.
2. Input values for the Angular X, Y, and Z rotational stiffness.
Go to the Inertia tab and define the following.
1. Enter a value for the bushing's Mass.
2. Specify values for the X, Y, and Z moments of inertia.
Go to the Damping tab and define the following.
1. Input values for the X, Y, and Z translational damping.
2. Input values for the X, Y, and Z rotational damping.
Once all parameters are defined, click Apply to create the grounded bushing constraint.
The virtual connector appears in the Connections branch. If selected, vectors representing the connection in the modeling window are displayed.
Note: A grounded bushing with damping is only supported for complex eigen value analysis. The running modes automatically run complex modes.