Create a sine event

This example shows how to define a base harmonic excitation in the Z direction using a sine event, and request results for ply stress at the peak envelope and at three specified frequencies: 40 Hz, and the third and fourth natural frequencies.

1. In the Simulation Navigator, right-click the dynamic simulation node and choose Create Sine Event.The Sine Event dialog box is displayed.

2. On the Excitation Frequencies tab, in the Lower Bound [Hz] box, enter 10.

3. In the Upper Bound [Hz] box, enter 2000.The software now considers 10 Hz and 2000 Hz as excitation frequencies.

4. In the Natural Frequencies group, from the Natural Frequencies Selection list, select User Selection. The software displays the Natural Frequencies Selection subgroup with a table that lists the Mode ID and frequency results from the Nastran SOL 103 Real Eigenvalues solution.From the table, select the third and fourth modes.The software now considers the natural frequencies of the third and fourth modes as the excitation frequencies.

5. In the Additional Frequencies group, select the Break Points check box.

6. In the Enter Additional Frequencies box, enter 4.00e+001.

7. Click Add Frequencies . The software now also considers 40 Hz as an excitation frequency.

8. On the Excitation Function tab, under Excitation Axis, click Z.

9. Under Excitation Curve, click Use Function .The XY Function Manager dialog box is displayed.

10. Click New to create a new AFU file.

11. Under Creation Steps, click XY Data .

12. In the XY Data Create group, set the Number of Points to 2.

13. Click Key In From Text Editor .

14. In the Keyin window, overwrite the existing values by entering: 1.000000E+001,5.000000E+000****2.000000E+003,2.000000E+001The AFU file now contains the acceleration values that correspond to the frequency bounds defined in steps 2 and 3.

15. Click OK until you return to the Sine Event dialog box.

16. On the Output Requests tab, click Create Output Request . The Laminate Sine Output Requests dialog box is displayed.

17. On the Stresses page, select the Enable Stresses Request check box.

18. Select the At Frequency and Peak check boxes.

How do I

Laminate Dynamics workflow

Create a dynamic simulation

Filter modes with small modal effective mass

Modify normal mode settings

Create a random event

Solve the dynamic simulation

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Simcenter 3D Laminate Dynamics

Random Event

Sine Event

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Simulation Navigator for Dynamic Simulation

Right-click commands for Dynamic Simulation

Laminate random results

Laminate sine results

Laminate Dynamics Details View subpanel (Simulation Navigator)

Supported elements

Damping definition

Modal truncation effects

Dynamic simulation output files

Confidence level in peak results computation

Supported failure theories

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Create a sine event, Simcenter 3D 2021.1 Series

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