Transient Analysis

Run Dynamic Transient Analysis in SimSolid.

Purpose

SimSolid performs meshless structural analysis that works on full featured parts and assemblies, is tolerant of geometric imperfections, and runs in seconds to minutes. In this tutorial, you will do the following:
  • Create Dynamic Transient Analysis.

Model Description

The following model file is needed for this tutorial:
  • Transient.ssp


Figure 1.
This file has the following specifications:
  • Material is set to Steel for all parts.
  • Regular connections with 2.5mm gap and 1.2mm penetration tolerance.

Open Project

Open the SimSolid project file.

  1. Start a new SimSolid session.
  2. Click the (Open Project) icon.


    Figure 2.
  3. In the Open project file dialog, choose Transient.ssp
  4. Click OK.

Create Modal Analysis

  1. On the main window toolbar, click the (Modal analysis) icon.


    Figure 3.
  2. In the popup Number of modes window, specify the number of modes as 9.
  3. Click OK.
    The new modal analysis will appear in the Project Tree.

Create Immovable Contraint

Create immovable supports on select faces in the model.

  1. In the Analysis Workbench, click (Immovable support).


    Figure 4.
  2. In the dialog, verify the Faces radio button is selected.
  3. In the modeling window, select the two faces shown in orange in Figure 5.


    Figure 5.
  4. Click OK.

Run Analysis

Solve the analysis.

  1. In the Project Tree, open the Analysis Workbench.
  2. Click (Solve).

Review Results

Plot displacement magnitude contour and review the modes.

  1. In the Project Tree, Select the Modal 1 subcase.
  2. On the Analysis Workbench, select > Displacement Magnitude.
    The Legend widow will open and display the contour plot. The Frequency (Hz) window will open and list the modes.


    Figure 6.
  3. View the mode shapes.
    1. In the Frequency (Hz) window, highlight a mode in the list.
    2. In the Legend, click (Start animation).
    3. Cycle between the other modes in the list.

Create Transient Analysis

Use modal results to create transient analysis.

  1. On the main window toolbar, select > Trasient.
    The Transient dynamics setup dialog will open and automatically link to the Modal analysis results.


    Figure 7.
    Note: If multiple Modal analyses with results are present in the design study, the user will have to create the linkage manually. An example is shown in Figure 8.


    Figure 8.
  2. In the setup dialog, for Time in seconds, enter 2.
  3. Select the Modal damping tab.
  4. For Default damping ratio, enter 0.03.
  5. Click OK.

Create Time Function

Create a time function for the transient analysis.

  1. In the Project Tree, click on the Assembly branch to open the Assembly workbench.
  2. On the workbench toolbar, click the (Time function) icon.
  3. In the Time functin dialog, click Standard.


    Figure 9.
  4. In the Standard time functions dialog, setup the function.
    1. For Function type select Triangle from the drop-down menu.
    2. For Amplitude, enter 1.
    3. For Start, enter 0.
    4. For Duration, enter 0.5.
    5. For Period, enter 1.
    6. Click OK.

Define Load

Apply Force/Displacement load.

  1. In the workbench toolbar, select > Force/Displacement.


    Figure 10.
  2. In the dialog, select the Spot radio button.
  3. Select the spot as shown in Figure 11.


    Figure 11.
  4. Under Total force or displacement along axes, for Z enter -5000.
  5. Click OK.

Run Analysis

Solve the analysis.

  1. In the Project Tree, open the Analysis Workbench.
  2. Click (Solve).

Review Results

Plot displacement magnitude contour and view maximum deformed shape.

  1. In the Project Tree, Select the Dynamic transient 1 subcase.
  2. On the Analysis Workbench, select > Displacement Magnitude.
    The Legend widow will open and display the contour plot. The Dynamics time response window will open. You can use the slider to animate frequencies.


    Figure 12.
  3. In the Dynamics time response dialog, click Show at peak to view the maximum deformed shape and its contour.
  4. Click to animate the model.