Introduction to modal analysis | Part 1 | What is a mode shape?

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In this video playlist we present the fundamental basics of an experimental modal analysis. This will guide you to your first steps in this typical analysis method in NVH development.
In this first video we will teach you the basic understanding of a "mode shape".
This knowledge of the fundamentals of modal analysis is necessary to start an own impact testing data acquisition.
Corresponding Videos to Modal Analysis:
Part 2 - Defining Points and Coordinates - • Defining Points and Co...
Part 3 - Roving Hammer Method - • Roving Hammer Method |...
Part 4 - Roving Accelerometer - • Roving Accelerometer M...
Part 5 - Different hammer tips - • Different hammer tips ...
Part 6 - Right sampling rate and block size for impulse tests NVH - • Right sampling rate an...

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7 июл 2024

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Комментарии : 44

@mrugeshpatel6804 4 года назад

OMG!!! Thomas Muller???

@gayatrigore7866 2 года назад

Watched zillion videos to understand mode shapes, no one explained it as beautifully as you.

@HEADacousticsInternational 2 года назад

Zillion is a really impressive number :-) We are all the more pleased that we were able to explain this complex topic in an understandable way also.

@jccasava2035 5 лет назад

Sehr hilfreich, vielen Dank.... Thanks a lot

@lioneloddo Год назад

A definition of modes based on linear algebra theory is so much much more satisfaying! A mode is just one axe, one dimension of an infinite dimension space. It blows the mind to realize that there is complete analogy between a 3-D dimension space and a modal space. To imagine a stationnary wave as one axe of a basis is just unbelievable, but it's true. Teh imagination can't accept this analogy, but using mathematicz, we can see the perfect analogy in particular the orthogonality property. In 3d-space, what is growing, it's the length of th (x,y,z) -axis for example, but in a modal space, what is growing, it's the amplitude of the specifics waves.

@taoyin2071 5 лет назад

Thank you for your video!

@pushkarlohiya834 6 лет назад

Nice explanation.. great job!!

@shwetanshumala2151 6 лет назад

awesome video .......... thank you sir

@muhittinselcukgoksu1327 6 лет назад

super. thank you soooo much.

@muhammadaliabid5793 3 года назад

Explained in simple words! Highly impressed!

@HEADacousticsInternational 3 года назад

Actually it is not that difficult 😊. Thanks for your feedback

@chetanfulaware 2 года назад

Great video sir..Thank you

@manjunatham_s 5 лет назад

Good job

@THEHALMIORIGINAL 6 месяцев назад

Really good explained.

@user-cy2pr6yn7s Год назад

WOW

@pathakan1988 4 года назад

Unbelievably good analogy and explaination !

@QwertyCanada 2 года назад

Not really

@chinmaya1765 4 года назад

Great Analogy Personally I may not agree in some point regarding the properties and other definition but I will definitely prefer and use the similar analogy for explaining others. Thanks to the team for providing complex knowledge in simpler form.

@HEADacousticsInternational 4 года назад

Nice to hear that. The team says Thanks

@andrewbeshara4306 3 года назад

phenomenal job...under rated.

@HEADacousticsInternational 3 года назад

Thanks for your nice feedback. At least you have seen this tutorial :-)

@muhammadnihalnaseer8713 3 года назад

explained fabulously.

@HEADacousticsInternational 3 года назад

Thanks for your good feedback

@mihirborker5240 Год назад

pretty good

@arshianikbakht1020 2 года назад

thank you so much ❤

@HEADacousticsInternational 2 года назад

You are welcome.

@nivperry685 4 года назад

yes!! thank you! wtf is mode shapes! can no one said the characteristics of the model!

@user-kh1jv5jk6n Год назад

It was perfect

@HEADacousticsInternational Год назад

We're glad we could help you get started. We have many more videos here that will help you overcome the typical difficulties in understanding modal analysis. Enjoy!

@aweiwei1987 3 года назад

Im quite confused about the theory of dynamic stiffness，hope you could break it down！

@HEADacousticsInternational 3 года назад

Indeed, this is a confusing topic. :-) Here is our solution: On the 8th of October there is a free online seminar about Transfer Path Analysis (TPA) which will explains this topic in total. Just search for "HEADucation" and register for this seminar. You are welcome!

@ignaciomarre7398 4 года назад

so are mode shapes those point at which each DoF reaches it's natural frequency?

@HEADacousticsInternational 4 года назад

If you mean degree of freedom in the sense of a vibrating mass, then yes. Reality is more complex :-)

@alexbalzer31 4 года назад

:-D so, you are telling me, if I want to get the eigenform of a german, I need to put alcohol inside them?

@HEADacousticsInternational 4 года назад

That is the most common method :-)

@viharize 3 года назад

Does mode shapes get influenced by stress over the body??

@HEADacousticsInternational 3 года назад

Yes, this effect exists. For example: Components that have not been hot-annealed again. This can cause considerable detuning of resonances in sheet metal parts. Look for "residual stress"

@jayaghosh_ 5 лет назад

how many mode shapes a body can possess?

@HEADacousticsInternational 5 лет назад

Thanks for your comment. Please write an email with your contact data to Social-Media@head-acoustics.de and we get in contact with you soon to provide you with detailed information on your question.