THE ENERGY DISSIPATION BEHAVIOR OF DISPLACEMENT DEPENDENT SEMI-ACTIVE HYDRAULIC DAMPER

摘要

The functionalities and energy dissipation capability of Displacement dependent semi-active hydraulic damper, DSHD are analyzed and discussed with complete experiment which involves the factors to affect time-delay of DSHD, and the reasons to cause sliding of the oil cylinder under the dynamic state. The test results show that 1) Time-delay occurs in unloading period because of the hysteresis phenomenon. Herein, Kelvin solid is approved to simulate this process and shows that stiffness of the brace and damping coefficient of oil will lead time-delay; 2) It's important to avoid sliding of the cylinder, caused by insufficient oil pressure and residual air in the oil cylinder and pipe, for achieving excellent performance of DSHD. These phenomena can be improved by applying appropriate pre-pressure to the oil tank.