以道路试验和台架试验为依据，研究双筒液压减振器的异响机制和降噪措施，用AMESim软件对减振器节流孔、膜片阀门和弹簧阀门等建立了流体动力学模型，并对试验结果进行了验证.通过数值模拟和阻尼参数影响分析，确定了节流气穴现象在压缩和复原行程出现的状态，并且得到了节流气穴现象和活塞杆异常振动与节流孔和充气压力的关系.为降低减振器异常振动噪声，进一步提出了在保证减振器外特性的条件下进行异响清除的改进措施.
Based on road and bench test, abnormal noise mechanism and reduction measures in twin-tube hydraulic absorber were studied, and fluid dynamic models of the damper orifices, disc valves and spring valves were established by using AMESim software and validated by the test results. Through the numerical simulation and damping parameters impact analysis, the state of the orifice cavitation appears in the compression and rebound stroke was determined, and relationship between orifice cavitation, abnormal vibration of the rod and the orifice, inflation pressure were found. In order to reduce the abnormal vibration noise of the damper, further improvements in abnormal noise clearing were proposed on the premise of guaranteeing the external characteristics of the damper.
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