【作者】 王成； 徐赵东； 徐业守；

【Author】 Wang Cheng;Xu Zhaodong;Xu Yeshou;College of Civil Engineering,Dongnan University;

【机构】 东南大学土木工程学院；

【摘要】 单出杆MRD因体积补偿装置的存在,使得活塞始终受向上的补偿恢复力;在小位移幅值、小电流下,补偿恢复力占阻尼器阻尼力比重较大,而现有研究中一般将其忽略或等效成某固定值。针对上述问题,首先分别对阻尼器中的浮动活塞和活塞进行了受力分析,推导了考虑摩擦力的弹簧-浮塞型单出杆MRD的阻尼力计算公式。然后,提出了一种改进单出杆MRD的方案:增大摩擦力来处理补偿恢复力;利用MATLAB数值模拟了小位移幅值、小电流下改进和未改进的单出杆MRD,对比分析了它们的示功特性和速度特性,结果表明改进的单出杆MRD有效解决了补偿恢复力的问题。最后,依据O型密封圈液压往复移动密封的设计理论,给出利用O型密封圈增大摩擦力的设计方法。所论述的研究结果表明相关设计方法的可行性,能够为单出杆MRD的研究、设计和工程应用提供参考。更多还原

【Abstract】 Because of compensating device,Single rod MR Damper’s piston was always compensated by the upward restoring forces under the small displacement amplitude and low current,the restoring force compensation accounted for a large proportion of the damper damping force,while existing researches generally ignored it or made it equivalent to a fixed value.To solve the problem,stress analysis of damper’s floating piston and piston were carried out;and spring-floating single rod MR Damper’s damping force calculation formula,which considered friction,was derived.Then,an improved single rod MRD solution was given:increase friction to eliminate compensation resilience;improved and unimproved single rod MRD were Simulated by MATLAB in the small displacement amplitude and low current.Hysteresis curve and speed characteristic were compared and analyzed.The results showed the solution was useful.Finally,according to the O-ring hydraulic reciprocating seal design theory,the design method of using O-ring to increase friction was given.The conclusions showed the feasibility of the relevant design method,and it can provide a reference for single rod MRD’s research,design and engineering application.更多还原