In sol 106 ,make sure you dont have any rbe2 or bar elements as they are linear elements.
The other thing to try out is to make more than one load cases and increase the number of increments on NLPARM card until you see any convergence. Note that convergence level ,and add another loadcase and...
Has anybody got any current industry experience of coupled acoustic modelling. I am interested in modal frequency response analysis. What sort of mesh density can give optimistic results on bothe structural and cavity.
thanks
The latches are very non linear and difficult to model. The tailgate modes are senstive to latch stiffnesses and these modes flare the torsional body modes.
Hi, I am looking at the modes of the automotive closures in installed conditions using FE model. The latch stiffness is critical. Has anybody got any stiffness numbers(spring rates) for a fore aft,vertical and lateral stiffness taht can be used in the analysis.
Has anybody got any idea of...
Thanks for the comments
Assuming I use sol 111 approach and use free free condition.
I will need bailout card if I use unit force on RLOAD card.
Which I am not sure if its correct.
Can I use SPCD card. If I can then I would not be able to apply the unit force.
When you run it in frequency domain, you will have an option to run it as modal frequency NASTRAN sol111 or direct frequency sol108.Which one??
The other question that arise is with boundary condition, as whether to run as free free state or constrained state.
To reduce the CPU time, is it...
I have already published this question in other forum. What is the best method to calculate point dynamic stiffness (mm/sec/Newton) in nastran for automotive application.
