clarification of force along axis

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Arnold.Ramsland
Posts: 13
Joined: Fri Oct 23, 2015 9:27 am
Organization: Ramsland Technology, LLC
Location: North Carolina

clarification of force along axis

Postby Arnold.Ramsland » Mon Jan 13, 2020 11:23 am

Hello,
It was my understanding that the forces applied to a component was directed along the specified axis. For example, the force specified in RootFxc1 would be directed along the actual x axis. This understanding came into question when using the Fusion 360 FEA simulation program, where the force along an axis is actually the force along a line parallel to the x axis at the blade root. As a result, a torque is applied about the y and z axes as determined by the value of the force times the distance of the blade root to the x axis. Consequently, the force values along the x, y, and z axes would be captured in the torque values about these axes, and it would be incorrect to enter both the torque and force values into the simulation program. I would greatly appreciation a clarification of this.

Thanks,
Arnold Ramsland

Jason.Jonkman
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Location: Boulder, CO
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Re: clarification of force along axis

Postby Jason.Jonkman » Mon Jan 13, 2020 1:46 pm

Hi Arnold,

That is not the case in the ElastoDyn module. To apply the loads transferred to the hub from a blade, both the forces and moments at the root should be used.

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

Arnold.Ramsland
Posts: 13
Joined: Fri Oct 23, 2015 9:27 am
Organization: Ramsland Technology, LLC
Location: North Carolina

Re: clarification of force along axis

Postby Arnold.Ramsland » Fri Feb 07, 2020 8:00 am

Thank you for your response. Everything worked out well.

Arnold


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