FRICTION-INDUCED VIBRATIONS OF RECIPROCATING CONTACTS

The tangential and normal oscillations for three reciprocating and sli ding pairs of different materials are experimentally obtained at diffe rent normal loads and reciprocating frequencies. The magnitude and pha se shift of the transfer function have been measured to correlate the normal and tangential induced oscillations. The results show a remarka ble effect of the properties of sliding pairs on both the normal and t angential vibration amplitude during the prescribed motion. The maximu m normal amplitude of oscillation is found to vary linearly with the m aximum contact pressure regardless of the material type of the sliding surfaces. It is also found that at high normal loads, the tangential amplitude is proportional to the sonic speed in the sliding pair mater ial. Analytical justification has been introduced throughout the work to substantiate and explain the experimental findings.