Modal analysis using ANSYS Workbench

This video demonstrates how to perform modal analysis using ANSYS workbench 2020 R2 and obtain natural frequencies and mode shapes of the structure.
Please leave a comment if you have any questions.
#ANSYS #fem #modalanalysis
You can download all the files from: github.com/Not...
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[@sbd8397]

Thanks for teaching real example for better understand

[@NotRealEngineering]

You are welcome!

[@cesarurra1642]

WOW

[@scott337]

@6:48 After meshing it and clicking onto geometry, it goes back to thin lines and I'm not able to continue by fixing the base. I even restarted the whole thing to try again but it still does it. Any suggestions?

[@AnkitTiwari-ky9rt]

Ya same thing happens with me

[@abhishekkumbhar966]

Is modal analysis did in Ansys is acceptable? Any acceptance criteria? What is allowable deflection /stress criteria?

[@micahguffey7202]

What factors should be considered when choosing the "Max Modes to Find" value?

[@AbdurRahman-sc7ky]

Thanks sir for this project

[@dsaun777]

Nice tutorial, well done!

[@GANESHNINGWAL]

Nice this is helpful thanks 😊

[@vss27]

Sir please make a video on rcc frame same as this model .. and can we also do cyclic loading to the frame ?

[@jejeja9]

Thanks so much!

[@NotRealEngineering]

You're welcome!

[@ameyvikramsudarshan7356]

sir Mai aapse ansys sikhna chahta hu kaise aapse contact karu

[@hairocontreras3374]

Excelente video my friend

[@NotRealEngineering]

Thank you 👍

[@maxmshensky]

Thank you my brother 🙏 ❤

[@NotRealEngineering]

welcome

[@kumaraguruvenkatachalam773]

Hello sir, could you please explain the reason behind S bending happening in structure ??

[@JayPatel-09876]

Which frequency is matching that leads to failure???

[@AbdurRahman-sc7ky]

You are rock siiiir

[@NotRealEngineering]

Thank you

[@prayagvv3063]

Sir when I was doing Modal analysis on a hollow tower with varying diameter, when clicking solve, it is shown that " Your product license has numerical problem size limits, you have exceeded these problem size limits and the solver cannot proceed ". How do I solve this problem ?

[@deepak_nigwal]

buy a full product license

[@thoufiqthoufiq-rg5it]

Hi
I would like to know how load can be withstand

[@omkarrevdekar3040]

what is invalid body with zero volume error?

[@omarch2315]

how to change frequency

[@huzaifamehmood2966]

i have ansys 2024 R1 and ther is not option for beams only assign and you have to chose from a given number of beams which is extensive but it doesn't have options to edit the beams or to change materials

[@aryankulkarni6476]

Same problem bro. What to do?

[@danielsarpe8768]

Can you please help me with the presentation or the video ? thank you in advance

[@deepak_nigwal]

ABSOLUTE BS... 😑 i feel sad for the beginners as they will never know why this is wrong 😓

[@gayathriperam8124]

Could you please mention the wrong things in the above video, thanks beforehand

[@deepak_nigwal]

​@@gayathriperam8124 as per this ansys model, the structure is assumed to be having a fully densed and homogeneous rectangular cross-section all the way. On the other hand, the real "civil" structure is much more complex and with non-homogeneous cross-section, containing reinforced concrete and reinforced bars which may also be highly preloaded, thus making it a somewhat composite structure. So the material modelling need to be added accordingly for concrete, bars and beam connections separately. Due to high self weight, the nonlinear regions materials may need to be added (by default the materials are linear), such assumptions are not made at small mechanical component levels.
Modal analysis is fairly simple and done nicely here, but its also important to understand the underlying physics before solving the actual problem, instead of just learning how to solve the problem. The composite beams would behave differently, the stress paths would be different and preloaded sections would affect eigen vectors and values accordingly and the results would be different than those shown here.
For civil structures like these, preliminary 2D analysis like this in the video are only useful to start the design in the pre-primary phases, but for complex and accurate modelling, the model needs to be divided into categories, such as, simulation of only metal beams and actual connections (is modelled accurately in IDEA statica) and other simulations like RCC in beams can be modelled in Ansys fairly accurately.
Finally, its important to correlate the natural freq and its range with real life values. Very tall civil structures have low natural freq, usually lower than 1 hz.

[@gayathriperam8124]

​@@deepak_nigwalalso could you please give some references to learn this😅, you can take my level as beginner