Intro to Mode-superposition Transient Analysis — Lesson 1

Transient analysis is used to study the change in a system's behavior over a specific time period by considering the temporal effects of inertia and damping. For example, when a car drives over a bump, its suspension system deforms temporarily to ensure a smooth ride. Transient analysis can be solved using two methods: the full solution method, and the mode-superposition method. In this video, we will focus on the mode-superposition method, which is a linear method and is highly applicable to most engineering vibration simulations.  It is also much more computationally efficient compared to the full solution method. In this video lesson, we start with a short lecture and then get into a workshop example in Ansys Mechanical.

Alternate video link.

Video Highlights

01:30 Examples of transient analysis
01:57 Governing equations of motion
02:26 Methods to solve transient problems
03:29 Number of modes to be included/mode truncation error
04:16 Suitable analysis types — MSUP method
04:37 Permitted loadings — MSUP transient analysis
05:16 Prerequisite for MSUP transient analysis
08:22 Transient analysis settings
08:59 Impulse load application
10:07 Interpreting obtained results

Simulation Files

Download the accompanying geometry and archived files here. Ansys Student can be downloaded for free here.