An Approach for Evaluating Structure-Borne Noise Emission of Axial Piston Units Using Blocked Forces

In the context of electrification and the development of quieter internalcombustion engines, the noise generated by axial piston units is becomingmore prominent. While established methods and standards exist for evaluat-ing airborne and fluid-borne noise of hydraulic pumps, the structure-bornenoise emitted by the pump and transferred to mobile machinery has rarelybeen investigated. A method that has gained popularity in recent applicationsfor characterizing structure-borne noise sources is the in situ blocked forcemethod. Blocked forces are receiver-system-independent interface quantities,allowing for a component-specific assessment of structure-borne noise. Thispublication introduces the fundamental approaches for determining blockedforces and presents the results of a metrological assessment of blocked