Meshing hours
Meshing hours
(OP)
How many hours should be taking for mesh whole bus model...?
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RE: Meshing hours
Tara
http://tinyurl.com/4ydjg7m
RE: Meshing hours
RE: Meshing hours
RE: Meshing hours
Generally, you would build a model that gave you a reasonable workflow and make assumptions beyond that. Some people try to capture too much detail and never ending solving the problem (i.e. they decide test is better or blow the budget). I remember one example where a person tried to account for all nonlinear behavior and was "almost there" for months. I took a stab at a simplified solution with GOOD assumptions and it matched the later performed test quite well.
Brian
www.espcomposites.com
RE: Meshing hours
For example, your mesh might be as low as few tens of thousands, and could be up to several million elements.
So, you should balance your mesh with your computer capability.
Good luck
RE: Meshing hours
RE: Meshing hours
Yes you are wrong pretty much. Solvers like Nastran and so on can cope with ridiculously large number of elements. Even on my little old laptop models with half a million or more DOF could be solved quickly, in RAM, and if they were too big for that they page to disk.
Cheers
Greg Locock
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RE: Meshing hours
Starting from the complete CAD model. Assuming that the analysis goal is calculate the whole frame, you have to import the files into the pre processor, extract all midsurfaces, connect with a lot of rigid elements, model the suspension, simplify a lot of things and you be talking about 800 hours of work. The mesh quality is an issue and takes longer to make than sloppy meshes.
The model size depends but can be solved in a regular dektop computer.
Regards
Andre
RE: Meshing hours
how long is a peice of string ?
more usefully ...
how much experience do you have, with FEA ?, with stress analysis ?, with bus structures ?
how reliable an answer do you want ? are you going to test as well (so you're not completely relying on the FEA results) ? or not (so people's lives depend on getting the right answers) ??
are you building a new bus, or tweeking an old design ??
sorry, but i don't see how someone can reply "800 hours"
RE: Meshing hours
Its not perfect and failures not predicted by the numerical models take place sometimes. But mostly the models are pretty reliable. Once the model for one specific vehicle is ready and validated, any changes like a new cross member design can be done very easily.
see you