基于冲击环境下粘弹性胶泥缓冲器的动力学建模  

Dynamics modeling of viscoelastic elastomer damper based on the shock environment

作　　者：徐忠四[1] 苏铁熊[1] 刘晓栋[1] 

机构地区：[1]中北大学机电工程学院,太原030051

出　　处：《应用力学学报》2013年第3期384-389,476,共6页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金(50976108)

摘　　要：为了提高军用车辆被动悬挂系统在各种路面的平顺性,设计了一款具有单向节流阀活塞结构的新型粘弹性胶泥缓冲器,并阐述了其工作原理,分析了该胶泥缓冲器的粘滞耗能特性与弹性储能特性。在此基础上,针对粘弹性胶泥缓冲器动力学建模较复杂以及测量数据与理论数据吻合度低的问题,将粘弹性胶泥的本构模型和胶泥在缓冲器中的运动过程结合起来对缓冲器进行动力学建模,克服了传统建模中只重视胶泥材料的本构模型而忽视运动过程的缺点。分别推导了该胶泥缓冲器在进程和回程过程中的阻力公式,最后用冲击实验证明:在各种不同速度下,测量数据与理论拟合曲线最大阻力的相对误差均小于5%。该研究工作为胶泥缓冲器的优化设计和车辆悬挂系统的动力学匹配提供了理论指导。In order to improve the ride of passive suspension system for the military vehicles in all kinds of roads,a new viscoelastic elastomer damper with one-way throttle vavle structure is designed,and its working principle is set forth.Viscous dissipating energy and elastic storing energy characteristic of elastomer damper are analyzed,based on which,for the problem that it is complex to build a dynamics model of elastomer damper and low anastomosis between measurement and theoretical data,a variable rigidity fluid model is used to modeling viscoelastic elastomer damper.The innovation point of the model is to combine the constitutive model of viscoelastic elastomer with their movement process in the damper and overcome the disadvantages in only attaching importance to elastomer’s constitutive model but ignoring the movement process in the traditional modeling.The resistance formulae of elastomer damper in the input process and return process are conducted respectively.Finally,the shock experiment proves that the relative errors of the maximum resistance between the measuring data and theoretical fitting data are less than 5% at the different speeds.All of which provide the theoretical guide for the optimal design of the elastomer damper and dynamic matching research between the elastomer damper and the vehicle’s suspension system.

关 键 词：粘弹性材料 胶泥缓冲器 冲击实验 动力学建模 

分 类 号：TB11[理学—数学]