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Stiffness of hydraulic cylinders in strength simulations

Good day all.

 

I met some problem during strength simulation of the crane. I need to include the influence of the 'stiffness' of the hydraulic cylinders in knuckle boom crane in order to achieve more realistic displacement of the whole assembly.

 

Do anyone have any experience with such problem? I think that similar problem may be considered during design of exavators and other machinery systems like car suspension (pneumatic systems).

 

Any advice is welcome Smiley Happy