Vertical Displacement for Rotational Force

Altair Forum User

I am running a rotational analysis using the RFORCE Card, and keep getting significant vertical displacement instead of displacement in the radial direction, which doesn't make sense. I should be getting the largest displacement in my radial direction. I have been trying to figure it out for days without luck. I have attached the file for reference. 

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tinh

I think the blade is bended due to RFORCE, so z-disp is higher than radia-disp

Altair Forum User

@tinh you say it's bent due to RFORCE, so is my rotational axis wrong? i think i've defined R1, R2, and R3 correctly, which should give me the most displacement in the radial direction. 

tinh

No no @sch, your axis is OK

It is due to your structure. If it is a simple bar like image (1) , there is only radial disp

but I think your structure is similar to (2), so when it rotates, it's bended, then axial disp is higher

Altair Forum User

@sch

 

I think @tinh is correct. Due to offset some moment is created and this is very high compared to radial displacement.