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How can I simulate a spectral density of energy caused by wind in Optistruct (Random analysis) ?

Guillaume CROUZET

Hello everyone,

I would like to simulate the effect of wind on a mast in a random analysis (Optistruct). Can we impute a power spectral density of the speed [(m/s)²/Hz] ?

How can we determine the wind PSD ? I searched on the (EUROCODE1_NF EN 1991-1-4)

Thanks,

Guillaume

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Adriano_Koga

if i'm not wrong you can do it with velocity. Your FRF need to point to a velocity over frequency input (similar to tutorial 1305 in the Help, but using SPCD/SPC and choosing VELOCITY in the RLOAD2 card).

After having your FRF in place, you need to add the PSD, similarly to OS-T 1325.

OS-T: 1305 Modal Frequency Response Analysis of a Flat Plate

OS-T: 1325 Random Response Analysis of a Flat Plate

Guillaume CROUZET

if i'm not wrong you can do it with velocity. Your FRF need to point to a velocity over frequency input (similar to tutorial 1305 in the Help, but using SPCD/SPC and choosing VELOCITY in the RLOAD2 card).

After having your FRF in place, you need to add the PSD, similarly to OS-T 1325.

OS-T: 1305 Modal Frequency Response Analysis of a Flat Plate

OS-T: 1325 Random Response Analysis of a Flat Plate

Thanks for informations.

What I was thinking is to insert a power spectral density of speed with speed (RLOAD2) but I don't know how we can determine a DSP (wind velocity is known).