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Force Output Coordinate System
Hi David,
I would like to calculate the stress in my profile. Since I have calculated the moments of inertia relative to the elastic center, I need the forces in that same coordinate system. My question is: Is the local body coordinate system for the sensor outputs of the simulation results at the pitch axis or at the elastic center? Thank you very much for the quick answers, that helps me a lot.
Best regards,
Linus
Hi Linus,
For Euler and Timoshenko beams, the beam itself is located at the elastic axis, and all forces and moments are also reported at this location.
For Timoshenko-FPM beams, the beam and the corresponding force and moment outputs are located at the pitch axis, which is also the reference axis about which the stiffness (K) and mass (M) matrices are defined.
In all cases, the orientation of the local blade coordinate system used for the outputs is aligned with the chord, as described in the QBlade documentation. The local X-axis is normal to the chord, the Y-axis is chordwise, and the Z-axis follows the beam direction.
Best regards,
David
