Principles of Vibration Analysis with Femap and NX Nastran: Normal Modes to PSD to Direct Transient

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SEMINAR OUTLINE:
Most engineers are pretty familiar with the general concepts of vibration analysis but maybe just need a few pointers on the fundamentals and perhaps some suggested readings. This white paper provides the simulation engineer with all the necessary background to perform the following analysis sequences with Femap and NX Nastran.
o Normal Modes Analysis
° Natural Frequencies and Mode Shapes (why they are only shapes and not magnitudes)
° Utility and Significance of Mass Participation
° Mode Strain Energy
o Modal Frequency Analysis
° Theory of Modal Frequency (all loads are sinusoidal)
° Shaper Table Sine Sweep Analysis
° Expanding Complex Results
o PSD Analysis
° Modal Frequency Analysis using Statistics
° One Sigma versus Three Sigma von Mises Results
° Fatigue Analysis with PSD
° Direct Transient Analysis (it is easier than you think)

[@juandavidlasantagarcia7619]

You obviously know what you are talking about. That's something somewhat expected in these types of videos. What is very uncommon to find is such a great communicator behind the screen. You take a very complex topic and grind it for us so that is not that scary anymore. THANKS.

[@chrisfisichella6659]

Excellent job. Thank you very much for putting those slides, the finite element models and the video together. You all did a great job.

[@rahulmenon3565]

George and Adriane are the best!!! More on seismic would be awesome!

[@prakashv4857]

Thanks for this video. It's really helpful to understand the principles of vibration analysis. could you please provide more info on RMS stress. How does PSD and ASD are related. How to compute the fatigue analysis by using random vibration.

[@osmick15]

Great video, you helped me with my analysis. I also really enjoyed the presenters vibe (vibration) lol. Thanks!

[@sudmudmud357]

😇 of calmness 20:41 👍 love it It’s a shame the last bit, most important parts : PSD and Transient analysis was rushed

[@fr6578]

Good job, thank you for many useful information

[@ccaalluuss]

too funny, thanks for the entertaining seminar

[@salekanayake8416]

Hi when u are referring to no loads applied , I assume you mean no continues load/s is acting on the structure . But for the initial excitation you will require a discrete loads applied at start. Am I right ?

[@Predictiveengineering]

+Sue Ekanayake Hi Sue, please see this white paper: www.predictiveengineering.com/support-and-training/whitepapers/FEA/linear-dynamics-everyone-part-1

[@kishoremn191]

Kindly explain the fatigue analysis with PSD part in an another video. Thanks