Force and moment on a cylindrical shaft

[olivierpa]

Dear All


I have to simulte a shaft with force and moment


For the force , I use a cartesian cordinnate system , now for the moment PTC sugest to use a Cyndrical cordonnates system as file attache


2009-09-22_083135_2005-06-20_160710_Applying_Torsional_Momen ts_on_Cylindrical_Shaft.zip


First thing I don't undesrtand is why I have to use cylindrical system, Can you explain ?


second problem , if I use 2 differents CS , for sure I will found a wrong result , so can you explain how can I creat my simulation ?


Many thanks for your help


Olivier

 

[KurtStark]

Applying torsional momene does also work with a cartesian coordination system

 

[headrush]

I do not understand why you need to use a cylindrical coordinate system either. The moment is a bending moment on the shaft, correct? Not a rotation moment, because a shaft does not typically have any resistance to rotation.


I do not think you need cylindrical coordinates. But I also do not think using a cylidrical coordinate system will affect the results, and it will likely give you more options for displaying results. Cylindrical coordinate systems are not so terrible, but you should not need one.

 

[Saladin]

Cartesian coordinate system is fine. Just be sure to select
the distribution option "Total Load at Point" when applying
the moment.

 

[olivierpa]

Dear All


Thanks for your help, I have testing moment definition using a cartesian coordinates system and I found same results as the one with cylindrical


Olivier