A modal analysis determines the vibration characteristics such as natural frequencies and mode shapes of a structure; it serves as a starting point for several linear dynamic analyses. The mode frequencies and shapes depend on the distribution of mass and stiffness in the structure. In a stressed state the stiffness changes due to the stress stiffening, altering its vibration characteristics. In this video, you will see how to perform a prestressed modal analysis in Ansys Workbench. Additionally, you will see how different natures of stress (tension and compression) change the frequency.

Simulation Files

Download the accompanying geometry and archived files here. The student version of Ansys simulation software can be downloaded here.

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