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@GregLocock , yes with varying extensions of the rod, it will have different frequencies as a consequence of varying length and stiffness. But does anyone know nat. freq. formula for just a cylinder rod/column and a thick hollow cylinder? Thanks, Anne

@BrianE22 , yes tube (rod) is a solid cylinder. And why would it miss any vibrating modes?

I guess what I am trying to do is first calculate the natural frequency of the cylinder itself which is a solid (yes, bending modes and the frequency basically for each corresponding modes) and afterwards find the vibration modes and corresponding frequnecy of the double acting hydraulic...

Hello, I am trying to measure the natural frequency of double acting hydraulic cylinder analytically to validate numerical method. I have already done a basic modal analysis of each of the components( solid cylinders, and the barrel) on ABAQUS. But the analytical formula I saw was based on some...