Create DDAM excitations

1. In the Simulation Navigator, right-click the Excitations node (under the current Event node) and select New Excitation→Translational DDAM.

2. In the New Translational DDAM Excitation dialog box, type a name for the excitation in the Name box.

3. From the Selection Method list, select the method for specifying the location of the excitation. DDAM excitations must be defined on enforced motion locations.To select a previously defined enforced motion location, select List Selection. You can select a single combination of node ID and direction.To select the enforced motion location directly in the graphics window, select Graphic Selection. Note: For information about creating enforced motion locations, see Specify excitation locations.

4. Select the excitation location on the model.If you selected List Selection in the previous step, click . In the Select Excitation Location dialog box, select a DOF from the list. Each listed DOF is a node ID and direction that is part of the enforced motion location you defined prior to solving the solution. You can choose one DOF. Then click OK. The node ID appears in the ID box and is indicated with a label in the graphics windowIf you selected Graphic Selection in the previous step, select the enforced motion location in the graphics window where you want to apply the excitation.

5. Under Loading Type, select the direction of the shock (Vertical, Athwart Ship, or Fore and Aft). This determines the coefficients the software will use from your coefficients file. For more information about the DDAM coefficients, see DDAM reference acceleration and velocity.

6. Under Response Type, select the type of deformation (Elastic or Elastic-Plastic).

7. Under Components, select the directions in which to apply the excitation. You can select the directions that were set to Enforced in the enforced motion location on which you are defining this excitation. The direction component you select should correspond to the Loading Type direction.

8. Click OK.

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Create DDAM excitations, Simcenter 3D 2021.1 Series

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