Shock Analysis using cosmosworks
Shock Analysis using cosmosworks
(OP)
Hi, I´m trying to analize a 20g (where g is accleration due to gravity) 15ms (where ms is microseconds) shock with Cosmosworks 2006. Does anybody knows how to do it?.
thanks in advance,
Dinesh
thanks in advance,
Dinesh





RE: Shock Analysis using cosmosworks
Otherwise, you need to run a dynamic analysis using acceleration vs. time as your input.
Garland E. Borowski, PE
Borowski Engineering & Analytical Services, Inc.
Lower Alabama SolidWorks Users Group
RE: Shock Analysis using cosmosworks
Cheers
Greg Locock
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RE: Shock Analysis using cosmosworks
Brian
RE: Shock Analysis using cosmosworks
I would restrain the model and apply the appropriate gravity load. Posts relative to strain rate might be a concern as others have posted. You could add a factor of safety for conservatism to overcome that.
I asked a similar question in the past which was not specific to COSMOS but more if there is a standard design philosphy for calculating the shock loads per MIL-STD-810. I was suprised but it seemed that no one had a standard reference like used for dynamic testing (ie) the Miles equation, 3 sigma, cumlative damage etc.
RE: Shock Analysis using cosmosworks
Must have missed the shock question. In the ship world, we used Mil-S-901D for shock guidance. There are some classified documents for specific coefficients, but a couple of packages offer Dynamic Design Analysis Method (DDAM) processors that are designed for surface and sub-surface ship shock. They have some built-in coefficients based on a declassified 1968 document.
I thought Mil-S-810 was more for vibration?
Garland E. Borowski, PE
Borowski Engineering & Analytical Services, Inc.
Lower Alabama SolidWorks Users Group
Magnitude The Finite Element Analysis Magazine for the Engineering Community
RE: Shock Analysis using cosmosworks
Regarding MIL-STD-810, it has quite a bit more than vibration. Of the top of my head it has shock, vibration, temperature, salt fog, dust, rain, etc. It or some derivation is used quite extensively in my experience for aircraft and mil vehicles.