User subroutine to define cross-correlation properties for random response loading.

User subroutine UCORR:

  • can be used to define the coefficients for the cross-correlation matrix in a random response analysis;

  • will be called once for the combination of any two degrees of freedom with nonzero prescribed loads for each load case specified as a concentrated or distributed load or once for the combination of any two excitation directions specified as a base motion;

  • allows correlation coefficients to be defined as a function of nodal coordinates; and

  • ignores any data specified outside the user subroutine for the associated cross-correlation matrix.

The following topics are discussed:

Related Topics
In Other Guides
Random response analysis
Random response to jet noise excitation