UPSD

User subroutine to define the frequency dependence for random response loading.

User subroutine UPSD:

• will be called once for each frequency at which calculations will be made during a random response analysis if the frequency function is defined in a user subroutine;

• is used to define complicated frequency dependencies for the cross-spectral density matrix of the random loading; and

• ignores any data given for the associated frequency function outside the user subroutine.

This page discusses:

• User Subroutine Interface
• Variables to Be Defined
• Variables Passed in for Information