Issue link: https://resources.randsim.com/i/1504493
192 ©2023 ANSYS, Inc. Learning by examples: step1 – Analysis setup Choose the excitation interval of interest. Choose sufficient number of intervals for accuracy (>100) Keep to "Program Controlled" or define manually a sufficient number of eigen-frequencies. set to YES. -Set to "Constant structural Damping", "Stiffness coefficient" or "Mass coefficient". -and define a non-zero value set to YES.