Generate mode shapes using BModes

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Jason.Jonkman
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Re: Generate mode shapes using BModes

Postby Jason.Jonkman » Fri Feb 19, 2021 9:28 am

Dear Satish,

I'm sorry, but I don't really understand your question. You seem to be referring to tower gages in the ElastoDyn output, but then mention the use of BModes to generate the mode shape input to ElastoDyn.

When using BModes to calculate mode shapes for ElastoDyn, BModes will output the deflection at all FE nodes of the BModes model.

Best regards,
Jason Jonkman, Ph.D.
Senior Engineer | National Wind Technology Center (NWTC)

National Renewable Energy Laboratory (NREL)
15013 Denver West Parkway | Golden, CO 80401
+1 (303) 384 – 7026 | Fax: +1 (303) 384 – 6901
nwtc.nrel.gov

Satish.Jawalageri
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Organization: University College Dublin
Location: Ireland

Re: Generate mode shapes using BModes

Postby Satish.Jawalageri » Fri Feb 19, 2021 9:37 am

Dear Jason,

Thanks for your reply.

Though I am getting s-s disp at all FE nodes, I am taking only s-s disp points in BModes results in such a way that it corresponds to the distance from tower base at which I considered for gage points in Elastodyn. (Just to understand I took only 9 s-s disp corresponding to the gage points)

Thanks,
Satish J

Jason.Jonkman
Posts: 5778
Joined: Thu Nov 03, 2005 4:38 pm
Location: Boulder, CO
Contact:

Re: Generate mode shapes using BModes

Postby Jason.Jonkman » Fri Feb 19, 2021 10:08 am

Dear Satish,

I'm sorry, but I still don't really understand your question. Are you deriving the mode shapes for ElastoDyn from displacement of all FE nodes outputs from BModes? Is this curve smooth?

Best regards,
Jason Jonkman, Ph.D.
Senior Engineer | National Wind Technology Center (NWTC)

National Renewable Energy Laboratory (NREL)
15013 Denver West Parkway | Golden, CO 80401
+1 (303) 384 – 7026 | Fax: +1 (303) 384 – 6901
nwtc.nrel.gov


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