Lifting Analysis of Horizontal pressure vessel using two lifting lugs in ANSYS, Part-1
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- เผยแพร่เมื่อ 28 มิ.ย. 2018
- This video explains possible lifting phenomenon, It highlights the lifting possibility with two and four lifting lugs. This video demonstrate the lifting analysis of horizontal vessel by two lifting lugs which are 60 to 90 degree with respect to lifting hook. It explains how to calculate the vertical distance for respective height analytically. It also explains the contact formation for lifting lugs, meshing guide, loading and boundary conditions. It highlights, how to prepare deck for lifting analysis along with results extraction like equivalent stresses, deformation and reaction validation
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THANK YOU SIR
Welcome !
Great thanks sir
Welcome
Thanks for this video!
I have two queries;
1. We get different deformations for different approaches (i.e. rigid, deformable or beam). If deformation of the component while lifting is my concern, then which approach should be used or which is more reliable?
2. If I use body to ground beam from at the lifting surfaces of lugs & carry out analysis i.e. one end of the beam is connected to lifting lug and other end of the beam is grounded, Do you think this approach can be used instead of remote point?
Hello Jigar, Please find my reply for the both queries:
1. If deformation of the component while lifting is my concern, then go with deformable approach.
2. Your said approach can be used (grounded should be at lifting coordinates) . But better try to simulate the realistic approach, dont try with any simple tricks.
You are doing actual lifting so you should decide how physically model will behave while lifting and decide accordingly lifting scenario. Try all configuration and compare with more realistic one.
Cannot find the part3 of this series. Can you please mention the link?
Hello, Part-3 is not yet created. You kind find another video on lifting analysis as fork lifting, th-cam.com/video/m_G5H0Kl_Tc/w-d-xo.html
For the same tank, can we consider the tank as a rigid body and the supports (saddles) as flexible? if yes, does ANSYS includes the mass of the rigid body in the analysis? can we confirm through reactions at the fixed support equal to the weight applied? Please reply
Hello Ulhasan, It will be good you can perform the same simulation and try to explore and revert back in comments section, thanks.
Hello team, can you please explain us what is the basic difference between displacement bc's and remote displacement bc's in ansys workbench. What are the different applications?
As name suggest remote BC create remote point to apply the boundary or loading conditions, while in case displacement BC you can apply directly on the geometry (surface/solid). Remote BC is useful where you want to apply remote loads ie. away from geometry (like in case of nozzle loads which are acting due to external piping, will be applied at the center or nozzle shell junction through remote BC)
Hi Grasp team,
It is really a knowledgeable video and it is very simple to understand the scope of the task but some of things difficult to understand because in between the video your voice is missing.
So can you please check and upload it again.
I have two question:
1- Adjusting the density of vessel to get overall weight of the assembly. My questing is why we are considering the assembly weight? actually my understanding is we are lifting the vessel by mean of slings so we should focus only the vessel weight.
2- could you please explain why remote point should align with CG, even if we consider some eccentricity from CG location it should not affect the lifting of vessel.
Hope I am able to explain my question.
Thank you for appreciation ! Please find reply below for your questions:
1. You should represent the actual operating scenario through simulation. You can either add the mass in vessel density or else add separate mass, the reaction should have the overall operating weight of the vessel while lifting.
2. It will be good if your CG will align with lifting point (hook), it will help to reduce the extra moment to due to eccentricity. In case of eccentric lifting, the additional moment due to eccentric distance will act.
Why is it necessary to insert individual remote point for each lifting lug? Can't we select both the inner surface of hole with single remote point?
Yes can simulate with single point also. Please refer our lifting beam analysis video for more detail on lifting scenario.
That's really an informative video. Appreciated ...!!! I am having doubts, 1. Why we are not considering acceleration in the lifting direction? (4g, 5g) Because as far as I know, We do consider acceleration in case of problems like lifting analysis, transportation analysis. 2. If the lifting position is a little eccentric with CG of structure, then in order to avoid extra moments, what should be my boundary conditions?
Thank you for appreciation ! 1.This is just explanation video, how to perform lifting scenario, for lifting it should be 1g only. For transportation the acceleration will be higher. 2. The boundary condition represent the actual site condition, so you need to fix the geometry as per site condition only.. In order to avoid extra moment, you need to constraint the rotation dof.
When i trying your step to step no result find
Remote point selection it's ok
When trying to solve it shows error
I dont think their is any problem, Just follow the steps and let us know for any issue.
Please can you do a lecture on container units (e.g gas rack, cargo basket or compressor skid)
Okay, we will upload. But you can check base frame (compressor , Centrifugal pump) video in our channel.
Hi, Is part 3, inclined lifting video available.
Its remain, We will upload.
@@graspengineering9249 Please upload that also it will make this series complete
Thanks a lot for your kind information…
I have a question this sign showing lifting lugs to remote displacement.
How it will be visible?
Plz
On solution tab, use visible on results to see the rigid links.
@@graspengineering9249 thanks
Hello sir, How are we suppose to design lugs...
Do you have any book for reference?
You can use ASME codes design by rule.
Giving time in solution information will effects the result...?
Timing in solution means? If you increase time step it will increase solution time & help to converge the solution but will not effect results.
Please share the model geometries on some file sharing website for ALL your videos so I can practice while watching your videos. Your videos are very good and informative.
Thank you for appriciation!
We usually use files from Grab CAD for the simulation. It's free website having geometry files to download. You can download and carry out the simulation. We usually delete files after video.
I will create video for the free websites available for cad model.
@@graspengineering9249 can you mention these website?
@@AM-of1hx GrabCad
Hi,
Can you please share the geometries? 3D Cad models
Hello, Please refer link on video for free CAD model. th-cam.com/video/JdJ2FTcvFKc/w-d-xo.html
is it possible to have the cad model please to follow the tutorial.
Sure will upload in our blogspot soon. www.graspengineering.com/category/design/fea-cad-geometry/
Very Useful video for designers but voice not louder
Thank you for appriciation.
Use up-to 70/80 volume for perfect sound effect.
How to show the slings in results..?
I am able to see in solution information window but not in result window
There is option in analysis setting visible on results. You can make it yes to see the sling or FE connection on results.
audio is too low and no audio at all at some period
We will replace this video with newer one Soon....