https://forums.autodesk.com/t5/inventor-forum/modal-analysis-with-fixed-and-not-fixed-force/m-p/9246812#M157125 <P>Attach file.</P> Mon, 13 Jan 2020 12:17:41 GMT JDMather 2020-01-13T12:17:41Z https://forums.autodesk.com/t5/inventor-forum/modal-analysis-with-fixed-and-not-fixed-force/m-p/9245945#M157124 <P>Hello everyone,</P><P>&nbsp;I am using the inventor's modal analysis for the first time, I have to find ways of vibrating the rigid body (example attached) and the respective frequencies. Forces f1, f2 and G are fixed while Fx is intermittently. How do I insert loads this way? I saw that there is a mode with a preloaded model but if I use that, the loads remain the same.</P><P>&nbsp;</P><P>Furthermore, I launched an analysis without loads or constraints, the first six ways of vibrating are at 0, as it should be, but then in the following the maximum displacement becomes constant at 213.9 mm, why does this number come from?</P><P>&nbsp;</P><P>Thank you</P> Sun, 12 Jan 2020 21:06:15 GMT https://forums.autodesk.com/t5/inventor-forum/modal-analysis-with-fixed-and-not-fixed-force/m-p/9245945#M157124 Anonymous 2020-01-12T21:06:15Z https://forums.autodesk.com/t5/inventor-forum/modal-analysis-with-fixed-and-not-fixed-force/m-p/9246812#M157125 <P>Attach file.</P> Mon, 13 Jan 2020 12:17:41 GMT https://forums.autodesk.com/t5/inventor-forum/modal-analysis-with-fixed-and-not-fixed-force/m-p/9246812#M157125 JDMather 2020-01-13T12:17:41Z