Evaluating RigidBody Modes in a Modal Analysis Using Ansys Mechanical – Lesson 4

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While we may analyze single parts in most practical engineering applications, typically, we have an assembly of parts of different sizes made from different materials, all interacting with each other. Contact conditions allow us to define whether parts are bonded together, if they can slide relative to each other, or if they can separate from each other. In short, without contact, we can’t model realistic interactions between parts, so understanding the basics of contact is important in our journey to model physical systems more accurately. In this video, we will focus our attention on setting up models with contact for linear or small deflection analysis, providing the foundation for our understanding of realistically representing part interactions. In Workbench, the contacts are automatically created and it’s always a good practice to check automatically created connections. We will do this via a short lecture and a walkthrough example using Ansys Mechanical. Also, we will show some tips and tricks to keep in mind when using contact conditions. • // INTERESTED IN MORE? • Visit Ansys Innovation Courses for free courses that include videos, handouts, simulation examples with starting files, homework problems and quizzes. • Visit today → https://bit.ly/3Eo8esU • // DOWNLOAD FREE ANSYS SOFTWARE • Ansys offers free student product downloads for homework, capstone projects, student competitions, online learning and more! • Download today → https://bit.ly/32eEcuR • // QUESTIONS ABOUT THIS VIDEO OR USING ANSYS? • Get help from Ansys experts and peers through the Ansys Learning Forum. Search for answers to common questions, browse discussion categories or ask your own question. • Visit today → https://bit.ly/3qsytK2 • // STAY IN THE LOOP • Follow our Ansys Academic LinkedIn showcase page for updates on learning resources, events, job opportunities, cutting-edge simulation content and more! • Follow today → https://bit.ly/3Bbaaow • 0:00 - Intro • 0:18 - What are Rigid Body Modes? • 2:26 - Checking Initial Contact Status using Contact Tool • 3:28 - First Six Natural Frequencies for Free-Free Modal Analyses • 4:05 - Directions of Rigid-Body Modes • 4:15 - What is Grounding? • 7:58 - How to Specify Max Modes to Find? • 8:50 - How to change Contact Formulation? • 9:31 - Participation Factor of Rigid-Body Modes

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