Random Vibration - Advanced

The Advanced dialog box sets the advanced options for the random vibration study.

• Method. Sets the method of integration.

• • Standard. It takes more time but generates more accurate results (recommended).

  • Approximate.

• Gauss integration order. Gauss integration order to be used in integration of response power spectral densities). The options are two point and three point Gaussian integration.

• Biasing parameter. Sets the value of biasing parameter which controls the selection of frequency points for integration. The power spectral density (psd) of the response is evaluated at these frequency points.

• Cross-mode cut-off ratio. Sets the cut off ratio of any two natural frequencies above which the cross-mode effects are neglected.

For example, if you set this ratio to 5, cross correlation effects are neglected between modes i and j (i>j), if wj / wi is larger than 5.