Altair RISE

A program to recognize and reward our most engaged community members

Nominate Yourself Now!

How to specify time varying moment in hypermesh?

Hello!!

I am doing dynamic analysis of vibration measurement test rig for single cylinder engine assembly. I have specified time varying force using DAREA , TABLED1 & TLOAD1. I want to know how to specify time varying moment of large time history (90 seconds, 0.0003125 s-increment).

Thanks & Regards

Ramsubramanian P

Find more posts tagged with

English

HyperMesh

Accepted answers

All comments

Altair Forum User

Hi RamSubramanian,

You can reference MOMENT load in RLOAD1 as excitation load.

Please refer to RLOAD1 card in help for more information.

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

Thanks a lot sir /emoticons/default_smile.png' alt=':)' srcset='/emoticons/smile@2x.png 2x' width='20' height='20'>

Altair Forum User

In same way, DAREA(Rotational dof activated) can be referenced as excitation load in TLOAD1 to specify time varying moment????

Altair Forum User

Hi,

yes you can give DAREA in TLOAD1. Are you performing any rotar dynamic simulation?

Altair Forum User

Thanks sir.

No. I am doing dynamic analysis of vibration measurement test rig for single cylinder engine assembly. I am going to apply the reciprocating imbalance forces & moments at the crank bearing and going to find acceleration response at the crankcase.

Regards

Ramsubramanian

Altair Forum User

In same way, DAREA(Rotational dof activated) can be referenced as excitation load in TLOAD1 to specify time varying moment????

Hi,

yes you can give DAREA in TLOAD1. Are you performing any rotar dynamic simulation?

I have tried DAREA(Rotational dof activated) to define time varying moment,but it failed.But if I changed DAREA(translation dof activated) ,it worked out! I mean DAREA can only be defined as force instead of moment.

Altair Forum User

Hi HuangZhou,

You can directly refer MOMENT or FORCE in TLOAD1 card. Refer to the attached snapshot from help.

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

Hi HuangZhou,

You can directly refer MOMENT or FORCE in TLOAD1 card. Refer to the attached snapshot from help.

Thanks for your reply! That is truely what I want to emphasize! I have used the same way as you said, and the result is the same compared with result I get from patran/nastran.

Altair Forum User

Well, I will also call MOMENT into RLOAD2.....Thanks....

Altair Forum User

Yes, MOMENT can be used as excited in TLOAD# and RLOAD#