Adding centrifugal forces to dynamic non-linear

protontim

I would like to know the best way to add a centrifugal force to a dynamic non-linear simulation of a rotor blade. My thought was to divide the blade model into segments and apply a different gravitational acceleration to each of blade segments based on their distance from the axis of rotation. While that would work, it seems a bit crude and cumbersome, so I am open to better options. Thanks.

JohnM

Use CCX custom commands below. Ramp may not be necessary, just example.
*AMPLITUDE,NAME=Aramp
0,0
.1,1
1,1
*DLOAD,AMPLITUDE=Aramp
rotor,CENTRIF,10000,0,0,0,1,0,0

protontim

Hi John,

Thanks for your help. When I looked at MECWAYs capabilities using CCX it says you cannot do centrifugal force when doing dynamic non-linear simulations. Is that simply a limit of the MECWAY interface and not of CCX? Will the custom commands you show run in dynamic non-linear?

Thanks for clarifying,
Tim

JohnM

The attached example problem demonstrates this use. I just ran it in the latest Mecway 13.1 using CCX 2.17, and it seems to work, but check it yourself to verify.