Learning Forum

[wangbb]

Hi all,

I meet a problem with random vibration analysis.

Solver version: R13
Result:
1, elements in d3psd result are normal.
2, elements in d3rms result are in a mess.
3, this problem recurrent in another computer, so suspection of computer system can be ruled out.
Is there anyone know what's the reason?

[igandiko]

Hi, could you please let me know what you mean by d3rms results are a mess? Did you try a different (newer) version of the solver? 

[2397731524]

 

Hi igandiko,

’in a mess’ means the elements have a large deformation and overlap.

I find the error is result from the order of solid elements. Elements in above screenshots are second order. I change the elements into first order, the elements in d3rms file are normal, as below screenshot shows. However, result of first order is less accurate than second order.