FAST theory manual

Dear Dr. Jonkman

Could you please send me a FAST theory manual?

I appreciate your time,

juno918@tamu.edu

Thank you

Leo

Sent.

Dear Mr Jonson
Can you please send this manual
e-mail: ali.elyaakoubi@gmail.com
Thanks

Sent.

Dear Jason:

I would also like to request a copy of the “Unofficial FAST Theory Manual”.

My email is: szy874@163.com

Best Regards!

Keshan

Sent.

Dear Dr. Jason,

I would like also to receive the Unofficial FAST theory manual if possible.

My email: amrmetwally@riam.kyushu-u.ac.jp

Thank you so much.

Best regards,
Amr Ismaiel

Sent.

Dear Dr. Jason,

Could you please send me the Unofficial FAST theory manual.

My email: sarkars@tcd.ie

Thank you so much.

Sent.

Dear Dr. Jonkman,

Could you also send me the “Unofficial FAST Theory Manual” for FAST v7,v8 and user’s guide for FAST v8?

My mail address: abc720919@gmail.com

Thank you

Kind Regards
Jason. Lai

Sent.

The following constitutes the current User’s Guide for FAST v8:

Best regards,

Dear Jason,

Could you please send me the Unofficial FAST theory manual? My email is zhoushengtao1991@foxmail.com

Thank you!

Best regards,
Shengtao Zhou

Sent.

Could you please send me the Unofficial FAST theory manual?

My email is gerrykoun@gmail.com

Thank you in advance

Sent.

Dear Dr. Jonkman

In the Unofficial FAST Theory Manual, in the Kinetics document, the Nacelle inertia dyadic has terms only parallel to d2 unit vector. Can you please clarify why the terms parallel to d1 and d3 unit vectors neglected? Here I’m assuming that d1, d2 & d3 are also the principal axes for the Nacelle.

I have attached the page below. I have also observed the same for generator inertia where Generator Inertia dyadic only has terms parallel to c1.

1.pdf (70.2 KB)

Thank you,
Saptarshi

Dear Saptarshi,

Good question. Yes, your understanding is correct. The pitch/roll inertias of the nacelle and the transverse inertias of the generator are neglected in ElastoDyn under the assumption that there influence on the full-system dynamic response is small relative to other terms. It would not be too difficult to modify the source code to include the currently neglected terms to see if they have an influence on your system.

Best regards,

Dear Dr. Jonkman,

Thanks a million for the clarification. The FAST input file has the nacelle inertia value about the yaw axis. From where can I get the nacelle inertia values about the other axes? Or should I just calculate it from the nacelle dimension?

Thank you,
Saptarshi

Dear Saptarshi,

You’d have to get that using data available for the turbine you are modeling.

Best regards,