I have a MDOF FEM model in which I perform a modal transient analysis based on the modal eigenfrequencies extracted in a prior step. I wish to excite only the first natural frequency of the system via a half sine impulse of 10G. I do not want to see contributions from other modes.
Is this possible? I'm not sure how to define the time abscissa value which correlates to the first natural mode. Any suggestions will be appreciated.