How to rectify the ERROR ID : 442. ERROR IN RIGID BODY DEFINITION (Spot and Mig weld)
Hey Guys,
Currently I am working on the crash analysis of a front bumper and I have joined the elements with spot and mig weld using a 1D Rbody connectors .
Whenever starting Radioss the solver says following: ERROR ID : 442 ** ERROR IN RIGID BODY DEFINITION.
I also attached the file, so that you can have a better look at the issue.
Please be so kind to help me
Best Answer
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Your animation output frequency was set to 0, in attached I changed it and also increased the runtime so it is long enough for impact to occur.
On running it though, it seems you have many other issues with this model.
Your mesh is shells, but it seems to be on the outer faces of all the surfaces of your parts, it should just be the midplane, so you have modelled hollow parts in effect. Because of that, you also have numerous intersections and penetrations in the model (where you have contact defined, the parts should not intersect each other or be closer together than the contact gap)
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Altair EmployeeAnswers
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It is not legal to have RBODY sharing nodes and you have many cases where this is happening, see image below
Also RBODY should not be node-node with the main node on the mesh, (main node should almost always be 'free' in Radioss for RBODY, since it is normally moved to the CofG of the Rigid Body during starter processing) you should create a separate independent node in between
In attached revision (runs through starter now tih no rigid body warning or error) I combined all RBODY having shared nodes and created new independent nodes for them using modelchecker and Rigid Body editor in HyperCrash, process only took about 5 mins. I also set ispher flag on for all your small Rbody, as some of them would have very tiny inertias about their axis otherwise.
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Thank you Paul sir.
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Hi sir, after run radioss, there are no 'result' button, what is the problem?
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Logesh M_22331 said:
Hi sir, after run radioss, there are no 'result' button, what is the problem?
That looks like you didn't set a termination time in your engine file (_0001.rad) /RUN card
You only sent the starter (_0000.rad) before so I don't know what settings you have?
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Good Morning sir,
After running file with engine card and termination time. I am unable to get the result tab in the radioss block. So I have attached the radioss file. Please be so kind to help me
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Your animation output frequency was set to 0, in attached I changed it and also increased the runtime so it is long enough for impact to occur.
On running it though, it seems you have many other issues with this model.
Your mesh is shells, but it seems to be on the outer faces of all the surfaces of your parts, it should just be the midplane, so you have modelled hollow parts in effect. Because of that, you also have numerous intersections and penetrations in the model (where you have contact defined, the parts should not intersect each other or be closer together than the contact gap)
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Paul Sharp_21301 said:
Your animation output frequency was set to 0, in attached I changed it and also increased the runtime so it is long enough for impact to occur.
On running it though, it seems you have many other issues with this model.
Your mesh is shells, but it seems to be on the outer faces of all the surfaces of your parts, it should just be the midplane, so you have modelled hollow parts in effect. Because of that, you also have numerous intersections and penetrations in the model (where you have contact defined, the parts should not intersect each other or be closer together than the contact gap)
Good evening If I use midsurfacing meshing then the problem of intersections and penetrations will be rectified
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Logesh M_22331 said:
Good evening If I use midsurfacing meshing then the problem of intersections and penetrations will be rectified
Not necessarily, but it should be much better than what you have now, you will still need to check for intersections and penetrations and correct them if required
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Sir I have rectified the penetration but I was unable to rectify the intersection. Can you guide me how to rectify the intersection
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Logesh M_22331 said:
Sir I have rectified the penetration but I was unable to rectify the intersection. Can you guide me how to rectify the intersection
An intersection is where 2 parts cross over one another, you need to move one or both parts tro remove the clash, intersections should show up in the same check tool as penetrations, you may select nodes manually and deintersect them using the tools in the panel
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