More on solver speed: ROI of expensive commercial sw?
More on solver speed: ROI of expensive commercial sw?
(OP)
Dear Sirs,
I'd like to ask You a new question on this topic which arises from the insight of given aswers.
I guess that my opinion about solver speed issue was not far from true: on today computer near all static/modal problems cam be solved quite easly in a proportional to precision ammount of time.
Only really tough problems (more expensive) like those due to non-linearity, speed time response (crash like) or CFD (high reynolds, transport phenomena, combustion ....) really need computing perormances.
I know that several commercial code offer several solution methods (explicit/implicit, direct/iterative), or even Multigrid/AMG methods.
Now here comes my question and iterest:
is there a Return On Investement of those codes one can be reasonably confident to achive?
I long for your prompt reply!
With best regards,
mastro
I'd like to ask You a new question on this topic which arises from the insight of given aswers.
I guess that my opinion about solver speed issue was not far from true: on today computer near all static/modal problems cam be solved quite easly in a proportional to precision ammount of time.
Only really tough problems (more expensive) like those due to non-linearity, speed time response (crash like) or CFD (high reynolds, transport phenomena, combustion ....) really need computing perormances.
I know that several commercial code offer several solution methods (explicit/implicit, direct/iterative), or even Multigrid/AMG methods.
Now here comes my question and iterest:
is there a Return On Investement of those codes one can be reasonably confident to achive?
I long for your prompt reply!
With best regards,
mastro





RE: More on solver speed: ROI of expensive commercial sw?
I don't know about RoI, since even the most expensive code costs less than the analysts wages, and the cost of building the FEA model is less than the cost of getting the data to feed into it. Of course, if you run uncorrelated models then this will not be the case. But in that case you might as well use the back of an envelope.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: More on solver speed: ROI of expensive commercial sw?
Believe me I have first hand experience of this happening!
RE: More on solver speed: ROI of expensive commercial sw?
I still have a question about the case study which really need speed perormances.
GregLocock reffers fatigue life prediction and to input data to feed FEM model, while johnhors claims about FEA cost to product cost ratio. I liked the insight and I got clearly the meaning of Your answers.
My question was more on the net weight of specialized codes on the total cost of product design: this was the sense of my question the return on investiment (commercial codes/ analysts wages) one can achive.
Even in easier way: which is the manifecturing area (defense, aerospace, medical, power supply) really earning from virtual prototyping with speacilezed codes?
Thank you twice!
Regards,
mastro
RE: More on solver speed: ROI of expensive commercial sw?
RE: More on solver speed: ROI of expensive commercial sw?
Someone running "gazillions" of DOF's would likely have a different opinion.
RE: More on solver speed: ROI of expensive commercial sw?
This is why at the automotive OEM's the niche players have almost no footprint--they can't scale to solve these sizes of models in a reasonable timeframe.
RE: More on solver speed: ROI of expensive commercial sw?
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.