Introduction to Vibration and Dynamics

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  • Опубліковано 5 сер 2024
  • Structural vibration is both fascinating and infuriating. Whether you’re watching the wings of an aircraft or the blades of a wind turbine as they flex to absorb turbulence, you have to admire the elegant engineering that discriminates between a structure’s ability to absorb loads against its desire to resonate and shake itself to pieces.
    Of course we remember learning about vibration at University. We mostly remember hours spent solving differential equations and matrices, and the look of joy on a young academic’s face as he or she finally proves the natural frequencies of a drum skin or the volumetric modes of a cup of coffee. It can’t be denied the mathematics of vibration are wonderfully elegant and perhaps even beautiful, so that when we finally master all the techniques we can genuinely take pride that we are part of that top 1% of the world’s population who actually understands such stuff. However, in the course of our careers we often forget this knowledge and the sheer thought of revising all that maths is particularly daunting. So that’s the purpose of this short webinar: to introduce (or revise) the principle concepts of structural vibration and dynamics without all the equations. The video is divided in three parts: Part 1 introduces the principle concepts of structural vibration applied to a trivially simple structure, while parts 2 & 3 extends these concepts to more complex examples.
    Part 1 - Structural dynamics What is the Dynamic Equilibrium and Natural Frequency? What is the ‘Frequency Response Function (FRF)’ of a vibrating structure? What's the effect of Damping? What is meant by ‘quasi-static’ response? What are 'linear' and 'non-linear' structures?
    Part 2 - Vibration loading & structural response What is Power Spectral Density (PSD) How do I calculate structural response using PSD and FRF?
    Part 3 - Vibration and Dynamics of real structures - Multi-degree of freedom systems What are ‘Modal frequencies’, ‘Mode Shapes’, ‘nodes’ and ‘anti-nodes’? How to calculate the Frequency Response Function (FRF) of a multi-modal structure What is anti-resonance? What is modal damping and how do we estimate it using: Experimental Modal Analysis (EMA) Operational Modal Analysis (OMA)
    For more information, visit www.ncode.com/products/ncode-...
  • Наука та технологія

КОМЕНТАРІ • 70

  • @sameergdk1
    @sameergdk1 Рік тому +9

    This presentation is simply perfect to understand how structural dynamics works, specially in Wind Turbines, thank you so much for sharing :)

  • @amremad4801
    @amremad4801 4 роки тому +6

    Perfect presentation! It's my first time to understand this thoroughly like that! Thanks

  • @AravindUkrd
    @AravindUkrd Рік тому +2

    Wonderful! Well structured, to the point, simplified lecture.

  • @Pranavjoshi5196
    @Pranavjoshi5196 2 роки тому +2

    Thank you so much for such an informative and clear session. Keep up the great work 👍👏👏

  • @wojciechczuba4959
    @wojciechczuba4959 4 роки тому +3

    Excellent presentation. Concise and intuitive.

  • @hamzahalsabahie1552
    @hamzahalsabahie1552 Рік тому +2

    Oh, my God
    I have been searching a lot for the true meaning of dynamics... and all I find are the mathematical equations in ouruniversity
    thank you very much

  • @ranjithk6770
    @ranjithk6770 6 місяців тому +1

    Thanks a lot for sharing!. It really helped me to grasp some of the difficult concepts.

  • @giljusjo
    @giljusjo Рік тому

    One of the best video to understand vibrations!

  • @erozi3512
    @erozi3512 Рік тому

    Extremely clear transfer of information!

  • @mangeshdeshmukh2140
    @mangeshdeshmukh2140 4 роки тому +1

    You are superb , beautifully explained , Great.

  • @chamindakalugalage1071
    @chamindakalugalage1071 4 роки тому +1

    Good and simple explanation.

  • @haifeicheng8460
    @haifeicheng8460 Рік тому

    Great introduction, easy to understand the basic concepts.

  • @sameersalihy7546
    @sameersalihy7546 5 років тому +1

    Thank you so much

  • @juanpablolopez680
    @juanpablolopez680 3 роки тому +2

    Oh my God! I finally got it. Beautiful explanation.

    • @Ncode
      @Ncode  3 роки тому

      Very glad to hear that! Thanks for watching.

  • @user-rp6ew8pg2z
    @user-rp6ew8pg2z 7 місяців тому

    lovely useful clip! thank you

  • @peterdolenc6041
    @peterdolenc6041 3 роки тому +2

    Thank you very much for an interesting and clear lecture.

    • @Ncode
      @Ncode  3 роки тому

      We're glad you found this presentation useful, thank you for taking the time to watch!

  • @koding
    @koding 3 роки тому +1

    Awesome clear explanation, thanks for the effort and congrats for the didatics

    • @Ncode
      @Ncode  3 роки тому

      Glad it was helpful!

  • @Bigpigdotcom
    @Bigpigdotcom 5 місяців тому

    Awesome program to refresh my mind after being a few years out of uni. Thank you!

  • @chouchou9496
    @chouchou9496 3 роки тому +1

    thank you

  • @semihtuncer12
    @semihtuncer12 Рік тому

    Thank you very much ..❤

  • @ahmedzeyad361
    @ahmedzeyad361 2 роки тому +1

    Amazing 👏 .thanks for your efforts

    • @Ncode
      @Ncode  2 роки тому

      Thank you so much for watching! Glad you enjoyed it!

  • @leuyimbac2483
    @leuyimbac2483 2 роки тому

    Great lesson. could you tell me what is the lowest acceptable natural frequency of tall building to resist only wind load and what's the acceptable acceleration.

  • @MokaladSalih
    @MokaladSalih Рік тому

    great information

  • @borna6403
    @borna6403 3 роки тому +4

    This is excelent! I hope that youwill keep up great work like this!

    • @Ncode
      @Ncode  3 роки тому +1

      Thank you for sharing this positive feedback!

  • @aligarmabi2912
    @aligarmabi2912 2 роки тому

    Amazing

  • @sssj5464
    @sssj5464 Рік тому

    Thank a lot

  • @igorsaveliev4487
    @igorsaveliev4487 2 роки тому +2

    Thanks for the video . Very helpful. On the minute 40:01 of the video you mention that there are slides with more math included for the calculation of PSD. Could you please share that ?

    • @Ncode
      @Ncode  2 роки тому

      Please request them at www.reliasoft.com/about/contact-us. Thank you for watching!

  • @javohirahmedov4261
    @javohirahmedov4261 4 роки тому +1

    thank you very much from china

  • @sidibomma15
    @sidibomma15 2 роки тому +1

    Excellent lecture sir.

    • @Ncode
      @Ncode  2 роки тому

      Thank you so much for watching! Glad you enjoyed it!

  • @hoangtuan1406
    @hoangtuan1406 2 роки тому

    In the mass matrix, Ip must be devised by 2 for the node 1 too, I think ?

  • @MokaladSalih
    @MokaladSalih Рік тому

    hi, any chance to get this lecture pdf file .
    thanks

  • @tamrin_negadiew
    @tamrin_negadiew 2 роки тому +1

    It's amazing presentation sir! Thank you for sharing!
    Sir, can I get the slides please?

    • @Ncode
      @Ncode  2 роки тому

      Please request them at www.reliasoft.com/about/contact-us. Thank you for watching!

  • @waynesiu158
    @waynesiu158 3 роки тому +1

    This the video makes my life suffer less from being hard stuck

    • @Ncode
      @Ncode  3 роки тому

      Glad we could help!

  • @chrisie1997
    @chrisie1997 2 роки тому

    on 54:17 a statement is made that for each resonance there should be an anti resonance. I think this does not hold for every FRF, only for a driving point FRF (the excitation and measurement location are the same). Can somebody confirm or deny this please. I am very curious

    • @Ncode
      @Ncode  2 роки тому

      Apologies for the delayed response. Please direct all technical questions to www.reliasoft.com/about/contact-us.

  • @_Wai_Wai_
    @_Wai_Wai_ 3 роки тому +2

    "Hello! Good Morning, Good Afternoon and Good Evening to you all!" ---Truman Burbank.

    • @Ncode
      @Ncode  3 роки тому +1

      Nice reference! :) Thanks for watching!

    • @_Wai_Wai_
      @_Wai_Wai_ 3 роки тому

      @@Ncode yes, it was the first thing on my mind when i heard you introduction.

    • @_Wai_Wai_
      @_Wai_Wai_ 3 роки тому +1

      @@Ncode really good explanation btw.

    • @Ncode
      @Ncode  3 роки тому

      @@_Wai_Wai_ Thank you so much!

  • @nicholasriches1205
    @nicholasriches1205 3 роки тому +2

    I’m a novice and I understood the theories clearly thank you

    • @Ncode
      @Ncode  3 роки тому

      We are so glad to hear that! Thank you for watching.

  • @zeddg8633
    @zeddg8633 2 роки тому

    I'm studying a rotating structure and for the first time of my life i see, when i pplot my Campbell Diagram, i see that my forward curve crosses my backward curve and it's a sawtooth curve. Can someone help me to undrstand it please?

    • @Ncode
      @Ncode  2 роки тому

      Hi Zedd. If you would like further assistance, please provide us your contact information via www.ncode.com/about/contact-us

  • @muhannadmobder6948
    @muhannadmobder6948 2 роки тому

    Hi can any one help me in vibration equation please?

  • @yanetissac1151
    @yanetissac1151 3 роки тому +1

    Excellent!!! Thank you
    Can I have the slides, please?

    • @Ncode
      @Ncode  3 роки тому

      Glad you enjoyed it! Please reach out to www.ncode.com/about/contact-us, and one of our representatives will be happy to help you!

  • @tejas123ist
    @tejas123ist Рік тому

    pure physics explained without mathematics!!

  • @pankajbaher
    @pankajbaher 3 роки тому +1

    NVH cant be explained simpler than this

    • @Ncode
      @Ncode  2 роки тому

      Thank you so much! We're glad you enjoyed this.

  • @kailashsingh9737
    @kailashsingh9737 Рік тому

    Good morning hi ji Sir

  • @alvaroponce14
    @alvaroponce14 2 роки тому +2

    This presentation is simply perfect to understand how structural dynamics works, specially in Wind Turbines, thank you so much for sharing :)

    • @Ncode
      @Ncode  2 роки тому

      Thank you so much for watching! Glad you enjoyed it!