Adams/View - start and end of translation

[nmuy]

Hi all,

I'm trying to model a hydraulic cylinder in Adams/View.

I'd like to have the piston sliding inside the cylinder. A translational joint constraints the sliding direction, but the piston is still able to move through the cylinder.

How do I make the piston stop, so it cannot pass through the cylinder?

 

[GregLocock]

The simplest way is to model the actual situation, using contact and springs. This is also rather slow computationally. A more complex method would be to define a non linear bushing with a lot of zero rate travel on centre. An even more complex, but very fast method is to write a bit of solver code to work out when the piston hits the end stop and then apply a very stiff spring.



Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

 

[nmuy]

Okay, I discovered Contact under Special Forces

My simulation failed at first because I was using STEP files which were imported as shells instead of solids.

I will try to continue with this model, as I'm new to Adams and everything I do is already sufficiently complex for me...

Thanks for your reply!

 

[GregLocock]

Importing 3d objects has always seemed to be robust to me, and usually a complete waste of time to make managers happy with the animations. Hard-core ADAMS users tend to run with graphics switched off. (True) We read the binary output files. (Liar). Good Luck.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?