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July 20, 2012, 14:03 |
Mesh keeps folding, Help?
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#1 |
New Member
Angus Bishop
Join Date: Apr 2012
Posts: 17
Rep Power: 13 |
Ok i suck , I'm trying to set up a rigid body simulation of a hollow cylindrical shaped hull of a boat , although i am stuck with a few things , as ever, help makes you awesome.
I keep getting an error message saying that my mesh has folded or something like that. This goes away instantly as soon as i turn off the motion parameters. Are there particular faces i need to set up that link with the mesh? Additional pics can be provided |
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July 20, 2012, 19:18 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,655
Rep Power: 143 |
It is MUCH harder to do this type of simulation as a rigid body. It is much easier to assume the floating body position and see what lift/drag you get at that position. You can then refine the body position if the lift or drag say it should be adjusted a bit.
Then the simulation becomes a series of fixed mesh simulations. This is much easier than a single rigid body motion simulation. |
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July 23, 2012, 05:08 |
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#3 |
New Member
Angus Bishop
Join Date: Apr 2012
Posts: 17
Rep Power: 13 |
Thanks for the reply , but i'm trying to do waves too, also trying to find the floating body position and a multitude of other things , so i need to learn how to do rigid body
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July 23, 2012, 05:34 |
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#4 |
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Kolja Müller
Join Date: Sep 2011
Posts: 2
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have you tried the buoy tutorial and mesh stiffness?
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July 23, 2012, 05:53 |
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#5 |
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Angus Bishop
Join Date: Apr 2012
Posts: 17
Rep Power: 13 |
Yeah my mesh stiffness is an enormous number , Unless it should be small?
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July 23, 2012, 07:46 |
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#6 |
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Kolja Müller
Join Date: Sep 2011
Posts: 2
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yeah, pretty sure. otherwise your cells vanish = folding, no? pretty sure youll find your answer in the buoy tutorial..
cheers |
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July 23, 2012, 08:36 |
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#7 |
New Member
Angus Bishop
Join Date: Apr 2012
Posts: 17
Rep Power: 13 |
Are there any particular design points that change by using a 3d problem?
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July 23, 2012, 12:29 |
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#8 |
New Member
Angus Bishop
Join Date: Apr 2012
Posts: 17
Rep Power: 13 |
Ah i think the issue is the Timestep size , Am putting it down to a lower value, It made a difference on the Bouy tutorial.
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