"request activity" for damper and bumstop doesent match?

Hello ,

funtion "request activity" can get request wrt-I and wrt-J. But for damper and bumpstop, the I marker and J marker are the same, which doesnt match what we want. Ohterweise, for bushing, spring, rebound are logical in the mind. So , is my thouht wrong?

0 Henrik.Skovbjerg over 2 years ago

Getting the force on the I-marker is the inverse of getting the force on the J-marker. It is just a matter of which end of the force element you watch.
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0 Alexis Del Rio over 2 years ago

the reference markers are different, one is the upper_strut and the other the upright
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0 zhenhui xu over 2 years ago

Hi Alex and Henrik

Thanks for you feedback.

In order to explain more clear from me, i attach the comprasion between bushing and bumpstop.

Please look at the difference about marker order for wrt_I and wrt_J both entries in the picture.

For example, if people was interested in request from I part. Then the I_marker should be imarker, J_marker shuold be jmarker, rmarker should be located in I part.

If people was interested in reqeust from Jpart. Then the I_marker should be jmarker, J_marker should be imarker, the rmarker should be located in J part.

It was what we want for bushing/spring/rebound entities. But it was not what we want for damper/bumpstop entities in version 2021.04. And it should be.

Is there anything wrong from my thought?
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0 Alexis Del Rio over 2 years ago

Hi,

Are you saying that the bumpstop I and J should swap in the wrt_J case?

To me the bumpstop protects upper_strut/body... from the upright impacts and not the other way around.

In any cases these are demo models and you may modify them to suit your needs if required.
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0 zhenhui xu over 2 years ago

Yes. I think the bumpstop I and J should be swap in the wrt_J case. Otherweise the component force direction is wrong, if i am interested in wrt_J for bumpstop and damper.

Alle the request was not modifyed by myself, it comes from tools-> request-> reqeust acitivity, automaticlly.
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