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Modal Mass - Ansys

Modal Mass - Ansys

Modal Mass - Ansys

(OP)
I am solving a problem where I am doing a modal analysis which is normalised to Mass Matrix method. Can anybody please tell me how do I find the modal masses assigned to first 8 modes?

RE: Modal Mass - Ansys

Am guessing here, but I think what you're after is the modal mass participation for each mode/direction. This information is given in the output file which, by default is only sent to thte output window and isn't saved in a file. You need to switch the output to a file prior to solve. To do this, just use the /output command and then solve. For example:

CODE

/output,output,out
solv
/out

Look in the output.out file and your modal mass participation will be in here for each mode.


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RE: Modal Mass - Ansys

(OP)
Thanks Drej. It worked. smile

RE: Modal Mass - Ansys

(OP)
It apears that in the output file, the values for the masses are for each direction(X Y Z translation and rotation). Total 6 for each mode. But I want one value of the mass for each mode. Meaning, 8 values for 8 modes. Can anyone please guide me?
Thanks.

RE: Modal Mass - Ansys

Then just sum the directional masses for each mode in turn (mode 1 X-direction mass + mode 1 Y-direction + mode 1 Z-direction). Why do you need this?


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RE: Modal Mass - Ansys

Hi,
as Drej says, why do you need this?
It appears to me to be unphysical, and that looking for the "most overall dangerous mode" like this could be misleading... Am I wrong?

Regards

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