How to solve instability at join connection

RE: How to solve instability at join connection

Modestas — Mon, 17 May 2021 10:55:44 GMT

Member releases are applied with respect to member's local axis. You can turn on local axis by click Shift + O in your keyboard. Green color represents local Z, red - local Y and blue - local X.

RE: How to solve instability at join connection

Muhammad Iqbal — Mon, 17 May 2021 09:57:02 GMT

Thank you!! yes its solve the problem with the warning sign. Can i have another question regarding the beta angel.

if i'm input the beta angel 90 degree to my H profile, where its gonna change my local direcation of my H profile, thats it will effect the direction of moment release?

like if i'm using 90 degree angel that will rotate the member, so if i want to release the moment Y (according to global direction) instead releasing MY, i should release the MZ. This situation if i only want to release moment at Y direction (according to global direction)

RE: How to solve instability at join connection

Modestas — Mon, 17 May 2021 08:24:27 GMT

These instabilities are reported in your model due to member releases. Changing the full moment releases to partial moment releases should fix this issue. I would recommend 99% moment releases as they work well. This means that 99% of the moment is released but a small amount (1%) is retained (a reasonable assumption since no pinned connection in reality is truly moment-free.) Your input would look like that:

MEMBER RELEASE

1 2 5 6 8 9 11 12 14 15 17 18 20 21 23 24 26 27 29 30 START MPY 0.99 MPZ 0.99

1 2 5 6 8 9 11 12 14 15 17 18 20 21 23 24 26 27 29 30 END MPY 0.99 MPZ 0.99

840 TO 848 869 TO 877 START MPY 0.99 MPZ 0.99

840 TO 848 869 TO 877 END MPY 0.99 MPZ 0.99