NWTC

Dear Mr jason
tell me please if I need to perform rthe mbc transformation in this model:
I have extracted a linear model from FAST around an operating point in the above rated wind speed with the activated DOFs: GenDOF, DrTrDof and Flapwise bending mode

Thank you for your response

Many thankls to your responses
tell me please if in your system of direction in the blades ,the in-plane mode correspond to the flpawise and the out of plane in the edg-wise, and what means pratically the symmetric and asymmetric mode of the three flapwise of each mode

the pitch angle is not zero because the model is taken in the above wind speed but really I dont find the pretwist parameter in the elastoDyn input file to verify if it is zero or not
Tell me please if this parameter has another name

Thank you very much Mr Jonson for your fast response Please what you means by model set-up For example in my study i have linearized a the model around an operating point in the high wind speed by activating GenDOF, DTrDOF and the first flapwise mode for pitch control purpose. So we can speak in thi...

Thank you very much well understood Please tell if the flap-wise bending mode couples to the drive train mode in FAST Let me know also the relation between the flap-wise, edge-wise to the symmetric and the asymmetric modes on the one hand, and the in-plane and the out-plane modes on the other hand S...

Mr Jonson tell me also how i can limit the wind speed in the operational region 3 (i.e the wind speed still above the rated wind speed) because I have fixed the mean wind speed to 15 m/s but the wind speed drops untill 7 m/§

ah ok thank you I founfd it at 1 s

They have the same second labels (100s)
Yes i want to generate a wind with a higher frequency content
what time step are you meaning, the only step that i know is the FAST time step which is for my model is 0.0125

For example you can see at the image Wehn i used the turbulent intensity (B) i obtain the below profile , i have also used turbulence intensity until 40% and always the almost the same profile whereas an author have created the profile in the top of the figure. I have never achieve to generate as th...

Thank you Mr Jonson
WELL understood
I means how to generate a very turbulent wind profile (i.e holistic wind). The profile that i have obtained is a litle smooth

Dear Mr Jonson

Please i want to create a very fluctuant wind profile with Turbsim, i have changed the intensity turbulence A,B and C, also the IEC turbulence type and almost the profile generated is the same
Can you please explain me how to obtain a very fluctuant model

Sincerely yours

Dear MR Jonson Thank you very much for the suggestion I have read the Test but I dont revealed my study case. Realy I dont know what type of DEL correspond to my state. In fact my aim is to test the effect of my controller on the fatigue damage of the drive train and the flapwise moment Can you plea...

Dear Jonson
Thank you very soon response
Please I am not familiar with Mlife. I foud it a reliable tool to calculate the loads.
Can you please summarize me how I can obtain the flapwise moment and LSS torque DEL in some steps. I have confused with the multiples documentations

Thanks

Mr Jonson Tell me please what about the twist angle (the difference between the High shaft speed and the low shaft speed angle) in FAST, is that different from the twist angle that you have indicated me in the post Fri Mar 17, 2017 9:15 pm Tell me also if it is equivalent to the drive train shaft tw...

Thank you
Please what about the output; low shaft speed torque (the name of the output in FASt)