Stress result of random vibration analysis

miya

Hello,

Recently I have tried doing random vibration analysis for a 3D model and I succeeded in outputing the acceleration response PSD with the help of REST_SPEC_PHYS operator. Everything goes well by following what SDLD101 testcase have done, except when I switch the setting of acceleration response result into stress response result (keyword NOM_CHAM in REST_SPEC_PHYS operator).

By reading the manual u4.63.22 chapter I of REST_SPEC_PHYS, I notice that it seems stress result is only available IN CERTAINS CONDITIONS. Do you guys have any idea on in which conditions can I obtain the stress response result? If someone have solved this problem before, can you show a simple case on this?

Thanks in advance for all your suggestions!

Regards,

Miya

JanBlokes

miya wrote:
Hello,

Recently I have tried doing random vibration analysis for a 3D model and I succeeded in outputing the acceleration response PSD with the help of REST_SPEC_PHYS operator. Everything goes well by following what SDLD101 testcase have done, except when I switch the setting of acceleration response result into stress response result (keyword NOM_CHAM in REST_SPEC_PHYS operator).

By reading the manual u4.63.22 chapter I of REST_SPEC_PHYS, I notice that it seems stress result is only available IN CERTAINS CONDITIONS. Do you guys have any idea on in which conditions can I obtain the stress response result? If someone have solved this problem before, can you show a simple case on this?

Thanks in advance for all your suggestions!

Regards,

Miya

Hello Miya,

I'm also interested in this topis. What do you mean by CERTAIN CONDITIONS? Did you use CALC_CHAMP function?

Regards,

Jan

zhudongyu

JanBlokes did you solve this problem?

zhudongyu

INTERRE5_SIGM = REST_SPEC_PHYS(GROUP_NO=('mat', ),
INTE_SPEC_GENE=DYNALEA_STRESS,
MODE_MECA=FREQ3_WITH_STRESS,
NOM_CHAM=('SIGM_ELNO', ),
NOM_CMP=('SIXX', 'SIXY'),
NUME_ORDRE=(1, 2, 3, 4, 5, 6, 7, 8),
OPTION='TOUT_TOUT')
when i use this it occured error.
i don't konw how to fix it.