Space-distributed and frequency dependant loads
Hello
I would like to do a stress calculation of a plate subject to a random excitation.
From an external software (Coustyx, boundary element method software via APA) I have the acoustic loading on the plate:
I would like to use this acoustic loading as input load in an Hypermesh model and then ran a frequency response analysis (Optistruct), to eventually calculate stresses.
The acoustic loading has the following information:
- node location / node ID (node IDs should be sufficient);
- vertical force vector component (acoustic loading is only along the vertical normal direction, only real component)
- frequency dependence of force vector
This means that I have a spatial grid of force vector for all nodes in my plate for each frequency in my simulation.
I have not been able to enter this information in Hypermesh (I am very new to that).
The problem seems quite basic, it is a random structural response from a diffuse field excitation, which is space-distributed and frequency dependant.
I have read the related Optistruct tutorial; however that does not help dealing with a more advanced input force load such as mine.
Any help? Perhaps via TCL scripting (but again, I have not seen commands to create space-distributed and frequency dependant loads).
Thanks
Mathias
Answers
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Altair Forum User said:
Hello
I would like to do a stress calculation of a plate subject to a random excitation.
From an external software (Coustyx, boundary element method software via APA) I have the acoustic loading on the plate:
I would like to use this acoustic loading as input load in an Hypermesh model and then ran a frequency response analysis (Optistruct), to eventually calculate stresses.The acoustic loading has the following information:
- node location / node ID (node IDs should be sufficient);
- vertical force vector component (acoustic loading is only along the vertical normal direction, only real component)
- frequency dependence of force vectorThis means that I have a spatial grid of force vector for all nodes in my plate for each frequency in my simulation.
I have not been able to enter this information in Hypermesh (I am very new to that).
The problem seems quite basic, it is a random structural response from a diffuse field excitation, which is space-distributed and frequency dependant.
I have read the related Optistruct tutorial; however that does not help dealing with a more advanced input force load such as mine.Any help? Perhaps via TCL scripting (but again, I have not seen commands to create space-distributed and frequency dependant loads).
Thanks
Mathias
Hi,
There is no such command maybe. but you can write a procedure to do that
- create a force loadcollector (excite)
- foreach node, create a force (you already know its xyz components)
- create a TABLE to vary the force vs freq
- create RLOAD
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