Understanding the Mode-superposition Method - Lesson 1

In linear dynamics, the mode-superposition method provides a computationally efficient solution in determining the system response in the frequency domain, or sometimes even in the time domain. For some types of linear dynamic analyses, we must use the mode-superposition method. Understanding this procedure is important in obtaining correct results. In this video, we will show you how to create a workflow on the project page for mode superposition-based analysis using Ansys Mechanical. We have a short lecture followed by a workshop walkthrough example showing how to implement the points discussed.

Alternate video link.

Video Highlights

00:51 — Harmonic response analysis

00:57 — Response spectrum analysis

01:10 — Random vibration analysis

01:14 — Transient analysis

01:40 — Modal analysis

02:24 — Extract mode shapes from modal analysis

02:55 — Now many modes to extract best practice

03:22 — Equation of motion

05:33 — Workflow on the project page, sharing and transferring data between analysis systems

07:16 — Reuse data from different systems but connections on the project page

07:30 — Prestress modal analysis

09:25 — Harmonic response analysis settings, data management, future analysis

09:54 — Modal analysis boundary conditions

12:55 — Harmonic response loads and supports

13:31 — Harmonic response results

Simulation Files

Download the accompanying archived project file used in the video lesson here. The student version of Ansys simulation software can be downloaded for free here.