# LoHo

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1. ## gyroscopic effect for simulation of rotordynamics

Totally agree with you Prakash, but i want to know whether the gyroscopic equation (angular momentum) is considered or not.
2. ## Rotordynamic Analysis Problem

Hi Prakash Pagadala, it seems to be all right with my parameters and settings. I already shared the model with my professor, consequently with Altair technical support. So model is shared with developer, we still wait for an answer. Anyway thanks.
3. ## Create marker refering two bodies

Hi Prakash Pagadala, if i fix it to the target body, the marker will not move "relative" to the target because it's fixed to it. It will behave (move) like its a fixed part of the target body. I think Altair has to improve the definition of markers, because in my opinion it's elementary to have a marker which is translational fixed to a body and the orientation is given by another body. If you havent got any other idea, nevertheless thank you.
4. ## Create marker refering two bodies

Hi Prakash Pagadala, at this moment i uploaded a minimal working example for you. Thanks for helping.
5. ## Create marker refering two bodies

Hi, i tried this before, but in the animation the marker does not follow the point i choose. Is this happening because the point does not refer to a body? Do i have to choose something other than a Point (defined by coordinates)?
6. ## Create marker refering two bodies

Thanks for quick answer, and how do i orientate the local coordinate system to my moving point?
7. ## Create marker refering two bodies

Hi, i want to create a marker in MotionView/MotionSolve which origin stays at fix coordinates (parent body is ground with coordinates 0,0,0) and orientates its z-axis to a moving point (of a body). Thanks for replying.
8. ## Rotordynamic Analysis Problem

Hello Prakash Pagadala, thanks for replying. Translational DOFs are fixed via RBE2 element at the bottom of the shaft.
9. ## Rotordynamic Analysis Problem

Hi everyone, i simulate vibrations of rotating systems. Therefore i start to build a model with only a vertical straight shaft with an unbalance (rigid body) on top. I simulate with a constant rotational acceleration up to 8500 1/min. Even with gravity the shaft is elongating along z-axis with more than 10% strain. Hourglass is already prevented.Any idea? Thanks in advance.

11. ## Segmentation Violation

Hi niwi, i've got segmentation Error because i forget to define the card images for components. Greetings from Germany to Germany ;-)
12. ## gyroscopic effect for simulation of rotordynamics

Hi Prakash Pagadala, what do you mean with "better problem definition"? Regards, LoHo