摘要
在分析解耦液压悬置的内部结构和考虑橡胶、液压模块非线性特性基础上,建立了能表征解耦液压悬置动态特性的物理模型,计算分析了解耦液压悬置的动态特性,研究了解耦盘及惯性通道在不同振幅条件下对悬置动态特性的影响。试验结果表明:所建物理模型能够较好的表征解耦液压悬置的幅变,频变特性。建立了包含解耦液压悬置的整车13自由度动力学模型,仿真计算了路面激励工况下系统的时域响应,并通过实车进行验证。最后,以抑制车辆过减速带衰减动力总成振动为目标给出了液压悬置的优化方案。结果表明:仿真计算出的发动机侧悬置和变速箱侧悬置振动加速度峰峰值与试验结果分别仅相差4.5%和12%,整车13自由度动力学模型得到了较好的验证;优化后的解耦液压悬置处振动加速度峰峰值衰减到初始状态的40%,优化效果明显。该研究方法为解耦液压悬置的设计、匹配提供参考。
A physics model of decoupling hydraulic engine mount(HEM)with the nonlinear characteristics of rubber and hydraulic component was proposed in this paper.The simulation and test results demonstrate that the proposed model can efficiently describe both frequency-dependent and amplitude-dependent dynamic characteristics of decoupling HEM.The influences of decoupling plate and inertia channel on dynamic characteristics of decoupling HEM under different excitation amplitude were investigated as well.A vehicle dynamic model of 13 DOF with decoupled HEM was established,and the time domain responses of the system under the condition of road excitation were comparatively analyzed and verified by vehicle experiment.Finally,an optimization scheme of the hydraulic mount was proposed to reduce the vibration of powertrain.The results show that the peak-to-peak values of the vibration acceleration of the engine mount and the gearbox mount calculated by simulation differ only 4.5%and 12%from the test results respectively,and the 13-DOF model is well validated.After the optimization,the peak-to-peak value of vibration acceleration at the decoupling HEM attenuates to 40%of the initial state,and the optimization effect is obvious.The study method of this paper provides valuable reference for the design and matching of decoupled HEM.
作者
刘雪莱
杜浩
陈俊杰
LIU Xuelai;DU Hao;CHEN Junjie(SAIC Motor Technical Center,Shanghai 201804,China;School of Mechanical and Electrical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2021年第20期135-142,共8页
Journal of Vibration and Shock
基金
国家自然科学基金(51905240)
江西省自然科学基金(20202BABL204035)
赣州市科技创新人才项目。
关键词
液压悬置
解耦膜
惯性通道
时域响应
hydraulic mount
decoupling membrane
inertia channel
time-domain response
