Abstract

Vibrational behaviour of hydraulic power system elements is crucial in aspects of noise problems. Hydraulic lines used in engineering systems to transfer hydraulic energy are also a structural and fluid coupling between vibrating elements of the entire system. Excitation generated in different places of the hydraulic systems due to external loads, control elements or flow pulsation are all transferred through hydraulic lines on which resonances may occur. Experimental investigations were undertaken in order to identify the influence of hydraulic pressure on the natural frequencies and mode shapes of a basic hydraulic line model. Modal analysis was conducted on a hydraulic line at several pressure increments to identify the change in natural frequencies and mode shapes.

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