上海交通大学 机械与动力工程学院， 上海 200240
出版日期:2018-03-28发布日期:2018-03-28基金资助:高速电动乘用车整车技术研发及产业化项目(2015ZDXX0601001)Hydraulic Shock Absorber Orifice Cavitation and Noise Analysis
AN Songgwang,CAO Yang,ZHANG JianwuSchool of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Online:2018-03-28Published:2018-03-28摘要/Abstract
摘要： 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.
关键词: 双筒式液压减振器, 气穴现象, 振动噪声
Abstract: 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.
Key words: twin-tube hydraulic absorber, cavitation, vibration induced noise
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