Hi to all,
I'm trying to solve some FSI models which correctly ran with version 3.5a.
The models calculated the eigenfrequencies of a solid structure vibrating in a fluid environment. Thanks to the "Damped Eigenfrequency analysis", that was possible, and results were correct.
Now, unfortunately with version 4.0a, without changing any BC, the eigensolver always fails with the error "singular matrix".
Clearly such a study is not a "default" one (as usual, the Fluid Flow module does not have any defaul analysis for the frequency domain) and thus I don't know if it is already possible with v4.0a.
I'm wondering if it is a problem regarding the Fluid Flow equations (they cannot be converted in their frequency counterpart) or regarding the eigensolver.
Is this last already able to solve Damped Eigenfrequency analyses too?
Is there someone which has already tried (also with other physical couplings) this kind of analysis?
Thanks in advance for the answer.
Alessandro
I'm trying to solve some FSI models which correctly ran with version 3.5a.
The models calculated the eigenfrequencies of a solid structure vibrating in a fluid environment. Thanks to the "Damped Eigenfrequency analysis", that was possible, and results were correct.
Now, unfortunately with version 4.0a, without changing any BC, the eigensolver always fails with the error "singular matrix".
Clearly such a study is not a "default" one (as usual, the Fluid Flow module does not have any defaul analysis for the frequency domain) and thus I don't know if it is already possible with v4.0a.
I'm wondering if it is a problem regarding the Fluid Flow equations (they cannot be converted in their frequency counterpart) or regarding the eigensolver.
Is this last already able to solve Damped Eigenfrequency analyses too?
Is there someone which has already tried (also with other physical couplings) this kind of analysis?
Thanks in advance for the answer.
Alessandro