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Apply a dynamic load to a truss bridge

Posted Feb 3, 2011, 3:19 p.m. EST Modeling Tools & Definitions, Parameters, Variables, & Functions, Structural Mechanics 3 Replies

Ryan Moriarty
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Long Story Short:

I am currently conducting a project where I analyze a dynamic load on a bridge that simulates a boat colliding with the side of the span of the bridge. Is there any way to apply a dynamic point or face load on the model trusses that are provided with the COMSOL software ( the Pratt Truss Tutorial) or would I need to build a completely different model in COMSOL to achieve this type of loading? Anyone know???


Thanks,
Ryan
3 Replies Last Post Feb 9, 2011, 1:51 a.m. EST
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Feb 3, 2011, 4:56 p.m. EST
Hi

for me trusses have only lines/edges and points, so you can mainly apply point loads. Then to get the point load to change with time, it's essentailly done by generating a function (your impulse shape, smooth enought to be derived at least once, if possible twice), and depending on the time; then off you go

What else so you need ?

--
Good luck
Ivar
Hi for me trusses have only lines/edges and points, so you can mainly apply point loads. Then to get the point load to change with time, it's essentailly done by generating a function (your impulse shape, smooth enought to be derived at least once, if possible twice), and depending on the time; then off you go What else so you need ? -- Good luck Ivar
Ryan Moriarty
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Posted: 1 decade ago Feb 8, 2011, 7:07 p.m. EST
Ivar,
Thanks for your help. Is applying the dynamic load as simple as inputting a function for a point/face load as opposed to a numerical value? If not, do you know where I could find any tutorials or instructions on how to apply this load(I'm a novice COMSOL user)?

Thanks,

Ryan
Ivar, Thanks for your help. Is applying the dynamic load as simple as inputting a function for a point/face load as opposed to a numerical value? If not, do you know where I could find any tutorials or instructions on how to apply this load(I'm a novice COMSOL user)? Thanks, Ryan
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Feb 9, 2011, 1:51 a.m. EST
Hi

the best way, and the one I followed was to do the exercices in the doc, run the video's on the web AND then follow a few of the COMSOL 1 day courses, these are really usefull toget a cick start

--
Good luck
Ivar
Hi the best way, and the one I followed was to do the exercices in the doc, run the video's on the web AND then follow a few of the COMSOL 1 day courses, these are really usefull toget a cick start -- Good luck Ivar

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