Can you specify spring stiffness and damping as a curve instead of a single value ?
Can you specify spring stiffness and damping as a curve instead of a single value ?
(OP)
I am wondering if it is possible to specify the stiffness and damping coefficients as curves ? I have a gas damper in real life on which the compression force depends on the velocity of the piston rod, so my values for stiffness and damping are variable. Can I model this with a translational spring damper in msc.adams ?
RE: Can you specify spring stiffness and damping as a curve instead of a single value ?
The answer is yes. Non linear arrays of numbers can be entered directly, that's called a spline. So right click in the textbox by the K in the spring design box, choose parametize/exprsssion builder. Then you can use AKISPLINE to create a function to read your x and f arrays, which you will also need to create.
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Can you specify spring stiffness and damping as a curve instead of a single value ?
Yes, I am using View. I have tried using what you have mentioned, although I used AKIMA_SPLINE (because I cannot find AKISPLINE in the options, I am using MSC ADAMS 2014), but I get the following error:
I don't think the K coefficient accepts multiple values.
Thanks,
Cosmin
RE: Can you specify spring stiffness and damping as a curve instead of a single value ?
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Can you specify spring stiffness and damping as a curve instead of a single value ?
Thanks a lot Greg!
Regards,
Cosmin
RE: Can you specify spring stiffness and damping as a curve instead of a single value ?