Random Vibration analysis examples

jcastas

Dear Aster users,

I have been using some commercial software to do random vibration analysis for shaker testing, however i would like to know more about this Code Aster software (i'm a recent user of CA), since it seems to have a huge capacity of performing FEA study's.

I have been doing some simple tutorials, most of them available on youtube and in some forums, so therefore i am familiarized with the application and some Aster Operands. However when it come's to do a more complex study ( like random vibration analysis) with Code Aster, it complicates... nothing is simple... and i end up lost with operands like DYNA_VIBRA, CALC_CHAR_SEISME, etc...

So i ask to someone (expert or not) some guidance , that can provide some examples "code.comm" file with basic code for a random vibration study...

I have an example attached, where a plate is fixed into a shaker at bottom (-Y edge) and it is excited with acceleration profile in the Z direction.

Freq (Hz) PSD acceleration (g^2/Hz)

20 0.010

80 0.040

350 0.040

2000 0.007

I have been reading some documentation, ... but without any success or confidance...

thanks for the support.

Joao

Attached file:
modal_frequency_response.zip, 109331kb

Anirudh

Hi,

Pls see testcase FDLV114

Regards

Anirudh

zhudongyu

Anirudh Excuse me, do you know how to calculate the stress and strain results of random vibration?

jcastas

Thanks for the answer.

Unfortunately i don't know how to do the model this FDLV114 test case.

I have been trying to do some examples (SDLD101) but i don't have good results until now... just errors.

Have you ever made the FDLV114 example?

cheers

Teddy

Hello Joao,

do you have an answer for your question?

Regards Theo

jeu

Hi, have you solved your problem?