The following notes were sent through to our VAR. The modelcomprised an assembly with parts of a vehicle mounted crane. Themodel was contructed for Simulation as a surface for the beams andsolids for brackets and bearing plates. An attempt was made to dothis two way - one way was to import the whole model intosimulation and then exclude the relevant solids. There wereproblems hiding and showing the excluded bodies. The other way wasto delete the solids from the model in the feature tree.
FEA was done on the attached assembly using SW Simulation 2009-1.The model was meshed as a combination of shells and solids.Problems encountered were as follows:
It takes a long time to carry out analysis of the model. Over anhour and a half was spent by the program just trying to solvecontacts. Running this model as a complete solid was much quickerbut there were concerns about the validity of the results withplates represented with one element across its thickness.
What is the minimum recommended number of elements across the platethickness to give sensible results? In the Cosmos courses we wereadvised to ensure there was a minimum of two elements across theplate thickness. This normally creates a solid mesh so small thatit becomes unfeasible.
The program was unable to hide a solid body after the body wasexcluded from the analysis. This can lead to confusion and error.In 2008 solids were hidden automatically when a component wasdefined with a shell mesh. This was preferred.
There were problems trying to redefine surfaces that werepreviously defined for mesh control after a part was excluded fromthe analysis or suppressed. Please investigate and advise if thereis a problem here.
When trying to define shell thicknesses the program failed tocorrectly identify shell faces of a part that was previouslyexcluded or suppressed. Please investigate and advise if there is aproblem here.
Provide recommendations on the best way to mesh this model?
When a part in an assembly is suppressed, how does the programhandle the previously specified mesh control surfaces and contactsfor that part. What needs to be done by the software user when thishappens to the mesh controls and contacts previously defined?
Hardware details are as follows: 8 GB of ram, Machine HP xw6400,graphics card Nvidia FX 1700, processor Core 2 Duo IntelE6850.SolidworksSimulation
FEA was done on the attached assembly using SW Simulation 2009-1.The model was meshed as a combination of shells and solids.Problems encountered were as follows:
It takes a long time to carry out analysis of the model. Over anhour and a half was spent by the program just trying to solvecontacts. Running this model as a complete solid was much quickerbut there were concerns about the validity of the results withplates represented with one element across its thickness.
What is the minimum recommended number of elements across the platethickness to give sensible results? In the Cosmos courses we wereadvised to ensure there was a minimum of two elements across theplate thickness. This normally creates a solid mesh so small thatit becomes unfeasible.
The program was unable to hide a solid body after the body wasexcluded from the analysis. This can lead to confusion and error.In 2008 solids were hidden automatically when a component wasdefined with a shell mesh. This was preferred.
There were problems trying to redefine surfaces that werepreviously defined for mesh control after a part was excluded fromthe analysis or suppressed. Please investigate and advise if thereis a problem here.
When trying to define shell thicknesses the program failed tocorrectly identify shell faces of a part that was previouslyexcluded or suppressed. Please investigate and advise if there is aproblem here.
Provide recommendations on the best way to mesh this model?
When a part in an assembly is suppressed, how does the programhandle the previously specified mesh control surfaces and contactsfor that part. What needs to be done by the software user when thishappens to the mesh controls and contacts previously defined?
Hardware details are as follows: 8 GB of ram, Machine HP xw6400,graphics card Nvidia FX 1700, processor Core 2 Duo IntelE6850.SolidworksSimulation
