ABSTRACT
This study proposed a transfer path analysis (TPA) method to estimate the percussion force of hydraulic breakers. The frequency response function (FRF) obtained through modal impact experiments are applied to the TPA model. The impact stress wave generated from the piston transmitted to the housing of hydraulic breaker. The impulsive force components on the housing were measured. The force components derived from TPA model are compared with the data obtained from the standard method using strain gauges. The TPA data were in good agreement with the standard method. This new method can be used to estimate the forces and vibrations of hydraulic breakers and rock drilling machines.
