The relative magnitudes of vibration in different directions and pressure fluctuations generated by typical hydraulic pumps are examined in conjunction with the extent to which they are transmitted along different types of hose to the subsequent circuit. By using a vibratory power flow approach, and looking at trends in the absence of resonances, it is possible to compare the importance of the different excitations and of their transmission by axial, bending and torsional waves along the hose. The predominant effect of pressure fluctuations from the pump is revealed.
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