Using Load-Deflection curve in dynamic model 1

[davidmandis]

Hello Everyone,
I have a simple spring mass system representing a landing gear of an aircraft. The landing gear has a composite tube which absorbs energy on impact in a crash situation. Now, I have the load-deflection characteristics of the landing gear which is a highly nonlinear curve (as shown in attached image). How can I convert this curve into a stiffness equation which can be used in the general equation of motion to find the displacement?

Thanks,
David

 

[GregLocock]

First approximation is that is just a constant force opposing motion.

Otherwise, use a time based simulation and a lookup table for the force.



Cheers

Greg Locock

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