Combine Random vibration and functional loads FEMAP 10.2 (Nastran)
Combine Random vibration and functional loads FEMAP 10.2 (Nastran)
(OP)
Hi everybody
Here I come with an easy one. I think my case must be so typical.
I need to combine random vibration and other functional loads (bolts preloads and pressure loads)in a model. I know how to combine functional loads but I don't know how to porceed with random vibration, in order to combine it with other static loads.
Thanks in advance.
Here I come with an easy one. I think my case must be so typical.
I need to combine random vibration and other functional loads (bolts preloads and pressure loads)in a model. I know how to combine functional loads but I don't know how to porceed with random vibration, in order to combine it with other static loads.
Thanks in advance.





RE: Combine Random vibration and functional loads FEMAP 10.2 (Nastran)
RE: Combine Random vibration and functional loads FEMAP 10.2 (Nastran)
Well, in FEMAP you can make any combination you like based in the results output sets, you can use "Model > Output > Process" to copy, combine, envelope and convert any existing output, being static or dynamic.
In order to perform a randoum vibration, you need to define the excitation, for instance a function of the applied PSD power spectral density (autospectra of base excitation) using the Model > Function menu selecting Type=3..vs.Frequency. Take a look to the tutorials of FEMAP & NX NASTRAN.
Best regards,
Blas.
~~~~~~~~~~~~~~~~~~~~~~
Blas Molero Hidalgo
Ingeniero Industrial
Director
IBERISA
48011 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog de FEMAP & NX Nastran: http://iberisa.wordpress.com/
RE: Combine Random vibration and functional loads FEMAP 10.2 (Nastran)
I found this paper with a explanation about how to perform random analysis of pre-stressed structures in MSC/Nastran.
http