Thank you for this excellent video. Noticed that at 21:17 - 21:22, the explanation requires a minor correction. The rotor on the left hand side is flexible rotor while right hand side is rigid rotor.
Hi, these videos are really impressive and valuable, but where is part 3 and part 4 on harmonic analysis and transient analysis that you mentioned please?
Hello thank you for appriciation ! We are working on that but giving preference considering interest of viewers. We will add in future, if you need any help please contact, we will provide reply.
Many thanks for the reply. Actually I am on the mechanical behaviors of magnetically suspended rotor. Apart from the magnetic bearings, our system includes touchdown (mechanical) bearings to protect the rotor (there is air gap between rotor and touchdown bearings) in case of instability of magnetic bearings. Current I want to simulate the mechanical response or stress/strain distribution of the rotating rotor when the magnetic bearings fail and the rotor hit the touchdown bearings. Could you advise me please?
@@graspengineering9249 Hello, is there a video where i could find ressources to obtain a rotodynamics time response? Any source of information would be helpfull
@@graspengineering9249 at 13:50 , you mentionned that we can do Stationary reference frame. Could you please tell me which type of analysis i should use and how ?
@@trungnghiale8286 for stationary frame, you can considered rotating mounting structure & stationary support structure like you rotating Rotor or impeller on fixed shaft.
i got it. If i use modal analysis with the fixed shaft. So in this case, features in rotordynamic controls like campbell diagram or bearing connection would be still taken into account ?
You need constrained motion in axial direction...Even you can see first rigid body mode shapes from modal analysis and constrined all in respective directions.
It is simple geometry, you can easily mode this. Try to explore our design modeler and Spaceclaim video series for CAD modeling. We will try to upload this model in our blogpost,www.graspengineering.com/category/design/fea-cad-geometry/
Hello, I'm trying to do a jettcott rotor analysis but getting warning message saying over-constraint and 2< share similar boundary conditions, can u help me solve, we have a project on Rotor dynamics analysis of Crankshaft so our guide told us to perform this to get better understanding. Please help me!
Hi, You might be constraining the rigids elements connected nodes too. check the model boundary condition and remove the unnecessary constraints. Let us know if you still facing issue.
@@graspengineering9249 No still facing that problem but when I tried solving, it doesn't show any critical speed value no matter what I do to geometry. Even if a add a point mass in Crank pin location it doesn't show imbalance. Can u please help me
It is quite simpler model, you can easily create in workbench. We generally upload Cad file on our blogpost: www.graspengineering.com/category/design/fea-cad-geometry/
Backward Whirl is rotor rotates on the whirl orbit with the opposite direction as about the rotational velocity Ω and forward is vice versa. Let us know for any further concerns.
Its default based on length of videos, will check further with our team. Please go with you tube premium for add-free videos, which will be good for you.
Super good! Heading to Part 2. Thank you for your effort!
Thank you for appriciation!
This is understandable to those who know the subject already..just reading the sentence on ppt..what explanation is given for instability
Just execute the problem with different BC, once you will get experience you will understand the definition too.
Thank you for this excellent video. Noticed that at 21:17 - 21:22, the explanation requires a minor correction. The rotor on the left hand side is flexible rotor while right hand side is rigid rotor.
You are correct
Thanks for share such knowledge! Very good explanation
Glad it was helpful!
Sir please start a online course related to vibration and rotor dynamic
U r a great teacher
Hi, We are working FEA Course on that, we will let you know once completed.
Nice explanation and good content 👌
Thank you 🙂
thank you , im analizing turbo charger vibration balancing. This is useful,
Thank you ! Please Subscribe and share!
Thank you for this outstanding illustration, you really helped me. only, the background music is not helpful for comprehending
Thank you for appriciation. We had removed background music for all new videos.
Nice explanation, thank you!!
Thanks and welcome
Hi, these videos are really impressive and valuable, but where is part 3 and part 4 on harmonic analysis and transient analysis that you mentioned please?
Hello thank you for appriciation !
We are working on that but giving preference considering interest of viewers. We will add in future, if you need any help please contact, we will provide reply.
Many thanks for the reply. Actually I am on the mechanical behaviors of magnetically suspended rotor. Apart from the magnetic bearings, our system includes touchdown (mechanical) bearings to protect the rotor (there is air gap between rotor and touchdown bearings) in case of instability of magnetic bearings. Current I want to simulate the mechanical response or stress/strain distribution of the rotating rotor when the magnetic bearings fail and the rotor hit the touchdown bearings. Could you advise me please?
Please share more details, images to understand more briefly.
Very nice. Thanks from Brasil!!
Thank you for appreciation !
Which rotating speed and which critical speeds can you explain
wonderfull. thanks from Perú
Thank you!
Could you please make a rotordynamics example in transient analysis (maybe a startup operation)?
Okay.
@@graspengineering9249 Hello, is there a video where i could find ressources to obtain a rotodynamics time response? Any source of information would be helpfull
There also comes gerator speed and engine speed please explain this
thank you so much. nice presentation that is very useful for me
Thanks for Appreciation !
@@graspengineering9249 at 13:50 , you mentionned that we can do Stationary reference frame. Could you please tell me which type of analysis i should use and how ?
@@trungnghiale8286 for stationary frame, you can considered rotating mounting structure & stationary support structure like you rotating Rotor or impeller on fixed shaft.
i got it. If i use modal analysis with the fixed shaft. So in this case, features in rotordynamic controls like campbell diagram or bearing connection would be still taken into account ?
@@trungnghiale8286 Yes !
can u share model and boundary conditions in detail for jeffcott rotor
You need constrained motion in axial direction...Even you can see first rigid body mode shapes from modal analysis and constrined all in respective directions.
thank you very much
You are welcome
Hello, is it possible for you to share the mechdat file?
Could you make a video about the modelling of this geometry and others ?
It is very simple, we have CAD modeling videos. Please refer our CAD playlist. If needed we will upload this model on our blog.
Can you share the model geometry file
Hello
How did you modeling thé rotor
Can you give us the different steps that you used
Thanks
It is simple geometry, you can easily mode this. Try to explore our design modeler and Spaceclaim video series for CAD modeling. We will try to upload this model in our blogpost,www.graspengineering.com/category/design/fea-cad-geometry/
@@graspengineering9249 ok thanks
How to get critical speed from campbell diagram in this example of rotor?
Please refer second part, we explained about critical speed based on Campbell diagram too.
Sir can you make a videos on bearing analysis
Okay !
can you also do flow analysis of cross flow turbine. I cant find any video on youtube
We only uploaded FEA videos. We will check, if we can add CFD videos too.
@@graspengineering9249 that would be great
What textbook do you recommend for rotary machinery?
We are not expert in that but you can refer any handbook for rotary machinery.
Hello, I'm trying to do a jettcott rotor analysis but getting warning message saying over-constraint and 2< share similar boundary conditions, can u help me solve, we have a project on Rotor dynamics analysis of Crankshaft so our guide told us to perform this to get better understanding. Please help me!
Hi, You might be constraining the rigids elements connected nodes too. check the model boundary condition and remove the unnecessary constraints. Let us know if you still facing issue.
@@graspengineering9249 No still facing that problem but when I tried solving, it doesn't show any critical speed value no matter what I do to geometry. Even if a add a point mass in Crank pin location it doesn't show imbalance. Can u please help me
Hello, what is Ratio in Campbell diagram control of ANSYS? Please help
Hello ! Campbell diagram is used to plot this changing dynamic characteristics of a rotating
structural component at different rotational velocities.
@@graspengineering9249 tq btw we completed the whole project on Rotor dynamics analysis of crankshaft
@@prathameshjadhav5008 Congrats !
May I know where I can get a the stp version of this model. I am new to ansys modelling .
It is quite simpler model, you can easily create in workbench. We generally upload Cad file on our blogpost: www.graspengineering.com/category/design/fea-cad-geometry/
Give a clear explanation about forward whirl and backward whirl I didn't understand anything
Backward Whirl is rotor rotates on the whirl orbit with the opposite direction as about the rotational velocity Ω
and forward is vice versa.
Let us know for any further concerns.
Can you send some research paper for reference
We do not have research paper. You can find it on internet.
Reduce adds. Not good.
Its default based on length of videos, will check further with our team. Please go with you tube premium for add-free videos, which will be good for you.
Sir can you make a video on bearing analysis
Okay!