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Characteristic Length?

yavylavy

New member
Good afternoon,


I have been working with a 4- bar mechanismthat turns a very long shaft. When the crank rotates it causes the long shaft to oscillate. I have been looking at changing the mass of the long shaftto seewhatkind of effects this has on motor torque. Pro-E is showing that changing the mass ofthe long shaft (over a hundred lbm) only changes my torque by a tiny amount but I can change the mass (not the lenght) of the crank (a few lbm at most)and I see a huge difference. I do not understand why Pro-E is giving me bad data, could Characteristic Length be the cause and if so how do I fix it?


I appreciate any help you can give I have been working on this problem for 2 days and I can not make any sense of it, thanks.
 

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