Gear in motion: static or dynamic?

[Fabi0]

I've to model a gearbox in the transitory (acceleration) and in the stationary (constant speed) running: i'm not sure abut the kind of step to use.
I'm gonna find contact pressure and stress in both case.

What about using static step for both?

 

[Jlog50]

Will you gearbox be modelled under transient loading conditions?

 

[Fabi0]

If we consider:

inDRIVESHAFT ---> GEARBOXES ---> outSHAFT

Its working is:

A- stop (no speed on the inDRIVESHAFT)
B- start working (angular acceleration on inDRIVESHAFT)
C- "regular" working (inDRIVESHAFT get his working speed, so there isn't anymore acceleration: costant speed and accelation 0)
D- stop working (angular deceleration on inDRIVESHAFT)

I don't need frequency, but point B should be investigated very well, because customers suppose that acceleration could be too strong for their product.

The acceleration is a simple linear acceleration.

Thanks for your interest

FB

 

[Jlog50]

This link may help to explain this

http://lofi.forum.physorg.com/Static-Problem-Vs.-Dynamic-Problem_10438.html

Hope it helps