Performing Random Vibration Analysis Using Ansys Mechanical — Lesson 1
Random vibration analysis enables you to determine the response of structures to vibration loads that are random in nature. Randomness is a characteristic of the excitation or input. Typical applications include loads experienced by an aircraft in flight, delivery trucks running on rough roads, and wave loading on offshore structures. Many random processes follow a Gaussian distribution, also referred to as a normal distribution. The excitation is assumed to follow a Gaussian distribution. The 1-sigma value represents occurrence 68.3% of the time, while 3-sigma values represent occurrence 99.7% of the time. In random vibration analysis, since the input excitations are statistical in nature, so are the output responses such as displacement and stress. At Ansys, the spectral density response is typically called a response power spectral density (RPSD). In this video, we will see how to perform a random vibration analysis using Ansys Mechanical, followed by a walkthrough demo. // 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 0:12 – Introduction to Random Vibrations 1:50 – What is Power Spectral Density? 2:51 – How to evaluate Random Vibration Excitations 3:22 – Gaussian/Normal Distribution 3:58 – What is Response PSD? 7:05 – How to input PSG G Acceleration? 8:08 – Retrieving 1 sigma deformation results 8:39 – Retrieving Response PSD with the Response PSD 9:07 – Interpreting 1 sigma deformation and Response PSD results
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