Error in Suspension Analysis 1

[Fariborz90808888]

hi everyone

thanks for helping a lot when needed

i have made a twist beam suspension model assembly on a testrig and when i get a test when performing it on the wheel centers instead of the contact patch, i get this error:

Static equilibrium analysis has not been successful.
The maximum number of iterations 25, has been reached.
For the last attempted iteration:
The equation with the largest error was model.rear.fbs_twist_beam Comp = 8 Error = 27297.105773
The variable receiving the largest increment was model.rear.ipl_fixed_5 Comp = 3 Delta = 77017.969068.
---- END: ERROR ----

Static Solution failed to converge

End Static Solution

Simulation failed



---- START: ERROR ----
Initial Static Sim. Not Successful
---- END: ERROR ----



---- START: ERROR ----

Adams Solver (C++) run terminating due to STOP requested by user.
---- END: ERROR ----


Termination status=-995

Terminating Adams Car usersubs...


Finished -----
Elapsed time = 0.99s, CPU time = 1.00s, 100.50%

Analysis failed!
Please check the error messages to determine the cause.

i have tried changing the joints but when i do that, i get an error about the jack testrig...

would anyone please help?

 

[Fariborz90808888]

FYI the interface that i have created is placed on the twist beam and is the location of the bumpstop which is placed on the twist beam...

 

[GregLocock]

25 iterations isn't much for static equilibrium, try 400. Also mess about with the error setting.

Cheers

Greg Locock


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[Fariborz90808888]

thanks as always... i will try that

how should i do that?

i know about the error in the solver setting but how about the iterations?

 

[GregLocock]

I haven't got ADAMS on this machine, it should be in the static tab of solver settings, called maxit probably.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

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[Fariborz90808888]

thanks a lot

appreciate your help

 

[GregLocock]

Whenever you run into a static equilibrium problem check that these settings haven't changed, and if they haven't, change them. This rather infuriating advice is the best I can offer. There is an MSC course on how the Solver works, which does at least make sense of the individual parameters. the help file is a good place to start. The MSC recommended settings for even quite similar models do vary.

Error is the single most powerful parameter, some models solve better with a bit more error, some with less.


Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

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