This example problem uses residual vectors to improve the solution accuracy in modal subspace based analysis methods, such as modal superposition and power spectral density (PSD) analyses. The problem includes a study of the computational efficiency of the results-expansion procedure used to obtain the full-model solution.

You can also perform this example analysis entirely in the Ansys Mechanical application. For more information, see Dynamic Simulation of a Printed Circuit Board Assembly Using Modal Analysis Methods in the Mechanical Technology Showcase: Example Problems.