Defining Uniform Base Excitation

You apply a Power Spectral Density (PSD) acceleration curve at the supports as a vertical uniform base excitation.

1. In the Simulation study tree, right-click External Loads and select Uniform Base Excitation.
2. In the PropertyManager under Type, select Acceleration.
3. Under PSD Acceleration, do the following:
   1. Set Unit to g^2/Hz.
   2. Select Along Plane Dir 2 and type 1.
4. Under Variation with Frequency, select Curve and click Edit.
5. Set Units to Hz.
6. Type the following values for the force curve data:

   Points	X	Y
   1	15	0.04
   2	1000	0.04
   3	2000	0.01

7. Click OK.
8. Click .
   The PSD acceleration is applied to all locations that are restrained in the specified direction.