Simulating Enforced Motion in Ansys Mechanical Structural Dynamics Problems

Back in engineering school, most of us studied the classical dynamics solution for a harmonic oscillator subject to a base motion. Although there are four different ways to model this situation in Ansys Mechanical, most users are not familiar with changes that occurred in 2010 (V12.1) or the fundamentals of how to conduct this type of simulation using Mode-Superposition Harmonic and Transient Analysis or Full Harmonic and Transient Analysis.

To help users get their heads around this classical problem in a modern tool like Ansys Mechanical, PADT’s Alex Grishin has created a tutorial. He took the model he used for a previous post on calculating reaction forces in a spectrum analysis, and carried out both the base excitation and large mass methods to explore the response of the model to enforced motion.

Here is the tutorial:

Here is a zip file containing the model Alex used and the Excel file he refers to.

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This tutorial is a great example of the in-depth fundamental knowledge the PADT team has about the mechanics, physics, and math behind FEM and CFD. If you found this useful, please consider PADT for overflow simulation work or as a training and mentoring resource for your Ansys users. We are here to help – let’s talk.

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