Simulating Enforced Motion in Ansys Mechanical Structural Dynamics Problems

Article on Structural Dynamics with Ansys Mechanical

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.

PADT is Here to Supplement and Improve Your In-House Simulation Capabilities in Structural Dynamics and Beyond

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.

Example of dynamics response from base excitation

Get Your Ansys Products & Support from the Engineers who Contribute to this Blog.

Technical Expertise to Enable your Additive Manufacturing Success.

PADT’s Pulse Newsletter

Keep up to date on what is going on at PADT by subscribing to our newsletter.

By submitting this form, you are consenting to receive marketing emails from: . You can revoke your consent to receive emails at any time by using the SafeUnsubscribe® link, found at the bottom of every email. Emails are serviced by Constant Contact

Share this post:

Upcoming Events


Connect Updates in Ansys 2024 R1 - Webinar


Structures Updates in Ansys 2024 R1 (3) - Webinar


E-Mobility and Clean Energy Summit


Fluids Updates in Ansys 2024 R1 - Webinar


Stratafest - Denver, CO


2024 CEO Leadership Retreat


New Mexico Tech Summit 2024


PADT30 | Nerdtoberfest 2024

Search in PADT site

Contact Us

Most of our customers receive their support over the phone or via email. Customers who are close by can also set up a face-to-face appointment with one of our engineers.

For most locations, simply contact us: