FE Model, Restraints, Integer, Scalar, Scalar
FE Model, Restraints, Integer, Scalar, Scalar, 1.1.0
FE Model, Restraints, Integer, Scalar, Scalar, 1.2.0
FE Model, Restraints, Integer, Scalar, Scalar, 1.3.0
About this Block
What it does: Runs an analysis on an Simulation Model that calculates its natural frequencies (eigenfrequencies) and their corresponding mode shapes. Common uses:- Understanding the vibrational characteristics of your model.
- Free modes of vibration calculations don’t consider forces. Therefore, we don’t need to use them in the boundary conditions.
- Run free-free modal analysis by not providing any Restraints.
- You can bound the minimum and maximum frequencies, but it will return an error if there are no natural frequencies in that range.
- When the calculation is complete, a Head’s Up Display (HUD) will appear that allows you to visualize the block’s results. The block’s visibility must be on to see the results window.
- You can change the min and max values in the colormap by clicking on their values.
- The “Deformation scale” controls the exaggeration of the displacement for visual inspection.
- To access the eigenfrequencies, open the Info Panel > Properties. Scroll down and expand the eigenfrequencies. Drag these into the Notebook to use the values.
- It is recommended to use a Quadratic Geometric order FE Mesh with any analysis to get the most accurate results.
Example File
Download Example: Modal Analysis
FE Model, Restraints, Integer, Scalar, Scalar
Calculate the natural frequencies and mode shapes of an FE Model subject to prescribed boundary conditions. This block calculates a specified number of vibration modes. Providing minimum and maximum frequencies bounds the range of frequencies to be returned. Removing the optional Restraints input leads to a free-free Modal Analysis.Inputs
| Name | Type | Description |
|---|---|---|
| Model | FE Model | The finite element model. |
| Restraints | Boundary Condition List | The displacement restraints. |
| Number of modes | Integer | Maximum number of modes to calculate. |
| Min frequency | Scalar | Lower bound of returned frequencies. |
| Max frequency | Scalar | Upper bound of returned frequencies. |
Outputs
| Type |
|---|
| Modal Result |
FE Model, Restraints, Integer, Scalar, Scalar, 1.1.0
Calculate the natural frequencies and mode shapes of an FE Model subject to prescribed boundary conditions. This block calculates a specified number of vibration modes. Providing minimum and maximum frequencies bounds the range of frequencies to be returned. Removing the optional Restraints input leads to a free-free Modal Analysis.Inputs
| Name | Type | Description |
|---|---|---|
| Model | FE Model | The finite element model. |
| Restraints | Boundary Condition List | The displacement restraints. |
| Number of modes | Integer | Maximum number of modes to calculate. |
| Min frequency | Scalar | Lower bound of returned frequencies. |
| Max frequency | Scalar | Upper bound of returned frequencies. |
Outputs
| Type |
|---|
| Modal Result |
FE Model, Restraints, Integer, Scalar, Scalar, 1.2.0
Calculate the natural frequencies and mode shapes of an FE Model subject to prescribed boundary conditions. This block calculates a specified number of vibration modes. Providing minimum and maximum frequencies bounds the range of frequencies to be returned. Removing the optional Restraints input leads to a free-free Modal Analysis.Inputs
| Name | Type | Description |
|---|---|---|
| Model | FE Model | The finite element model. |
| Restraints | Boundary Condition List | The displacement restraints. |
| Number of modes | Integer | Maximum number of modes to calculate. |
| Min frequency | Scalar | Lower bound of returned frequencies. |
| Max frequency | Scalar | Upper bound of returned frequencies. |
Outputs
| Type |
|---|
| Modal Result |
FE Model, Restraints, Integer, Scalar, Scalar, 1.3.0
Calculate the natural frequencies and mode shapes of an FE Model subject to prescribed boundary conditions. This block calculates a specified number of vibration modes. Providing minimum and maximum frequencies bounds the range of frequencies to be returned. Removing the optional Restraints input leads to a free-free Modal Analysis.Inputs
| Name | Type | Description |
|---|---|---|
| Model | FE Model | The finite element model. |
| Restraints | Boundary Condition List | The displacement restraints. |
| Number of modes | Integer | Maximum number of modes to calculate. |
| Min frequency | Scalar | Lower bound of returned frequencies. |
| Max frequency | Scalar | Upper bound of returned frequencies. |
Outputs
| Type |
|---|
| Modal Result |