Consider an airplane in flight or a train on its tracks — both experiencing random vibrations. To study such models with uncertain loads, we utilize random vibration analysis. The input of this analysis follows a Gaussian distribution and is statistically represented as a power spectral density. Because the input is uncertain, the output of this analysis is statistical in nature as well. As a result, unlike others, the directional outcomes (such as stresses) cannot be combined in the usual way; therefore correctly interpreting the results is crucial. In this video, we will discuss the importance of interpreting the results of a random vibration analysis correctly and how to do so.

// 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
1:06 - Statistical nature of the results/ output
2:15 - Scale factor for RMS Results (1 sigma, 2 sigma, & 3 sigma)
2:58 - Derived Results/ Derived Quantities
4:38 - Solution Coordinate System
5:08 - Importance of Element Orientation
5:43 - Response PSD Tool and benefits
5:58 - RPSD Definition
6:29 - RMS Definition
6:44 - Expected Frequency Definition
8:39 - Setting Element Orientation
9:04 - Requesting Sufficient Modes
10:01 - Participation Factor Listing
10:35 - Input PSD Specification
11:30 - Random Vibration Results
15:10 - Relative vs Absolute Results
16:33 - Frequency Clustering