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ptc-44278961-Visitor
1-Visitor
November 11, 2013
Question

Insufficient Contraints

  • November 11, 2013
  • 1 reply
  • 2631 views

So I'm trying to Run an analysis on an assembly and I am getting the error of (see picture). I have been able to run a few successful analysis but lately they are coming up with this Analysis. Any suggestions?


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1 reply

J
JonathanHodgson13-Aquamarine
13-Aquamarine
November 11, 2013

Something is moving without generating any opposing force.

Assuming that you have constrained your assembly fully (every component prevented from translating or rotating?) then other things to check are that a) you've assigned a material to each component, and b) each material has a (sensible) value for Young's Modulus.

P
ptc-44278961-VisitorAuthor
1-Visitor
November 11, 2013

The assembly is fully constrained, I do have material assigned for everything (includes density and Young's Modules). The only thing I changed between the first time I ran the analysis (when things were working) and now was changed the units on my forces because I had the wrong units.

J
JonathanHodgson13-Aquamarine
13-Aquamarine
November 11, 2013

Sometimes the suggestion of "running a constrained Modal analysis with rigid mode search" does actually help. If you do that and animate the results, it often shows which component is underconstrained, and in which direction.

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