非线性影响下悬置系统模态分析及解耦度计算方法研究

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英文篇名：A Research on Modal Analysis and Decoupling-degree Calculation Methodsof Mounting System Under the Influence of Nonlinearity 作者：胡金芳 ; 高东阳 ; 朱冬东 英文作者：Hu Jinfang;Gao Dongyang;Zhu Dongdong;School of Automotive and Transportation Engineering, Hefei University of Technology; 关键词：动力总成悬置系统 ; 液压悬置 ; 非线性特性 ; 幅变特性 ; 模态分析 英文关键词：powertrain mounting system;;hydraulic mount;;nonlinear characteristics;;amplitude-dependent characteristics;;modal analysis 中文刊名：QCGC 英文刊名：Automotive Engineering 机构：合肥工业大学汽车与交通工程学院; 出版日期：2019-05-25 出版单位：汽车工程 年：2019 期：v.41;No.298 基金：国家自然科学基金(51505115);; 安徽省自然科学基金(1608085QE124)资助 语种：中文; 页：QCGC201905013 页数：8 CN：05 ISSN：11-2221/U 分类号：80-87

摘要

为研究激励幅值和频率对动力总成液压悬置系统模态的影响,以惯性通道式液压悬置为例,首先分析了上液室刚度的幅变特性,推出了悬置动刚度的幅频特性表达式,并提出了非线性影响下悬置系统模态分析和解耦度计算方法。接着,采用这一方法对不同幅值下动力总成液压悬置系统进行模态和解耦度的实例分析。最后,总结出了模态类型的判据和垂向解耦度的优化目标,并在此基础上对悬置刚度进行优化。结果表明:液压悬置动刚度的幅频特性对系统的垂向模态、扭转模态和侧倾模态影响较大,其他模态基本不变,优化后的刚度满足隔振要求。
        To study the effects of the excitation amplitude and frequency on the vibration modes of the hydraulic mounting system of powertrain, firstly the amplitude-dependent characteristics of the stiffness of the upper fluid chamber are analyzed, taking an inertial channel-type hydraulic mount as an example, the formulae of the amplitude-frequency characteristics of the mount stiffness is derived,and the methods of modal analysis and decoupling-degree calculation for the mounting system under the influence of nonlinearity is proposed. Then, a real case analysis on the vibration modes and decoupling-degrees of the hydraulic mounting system of powertrain with different amplitudes is carried out with this method. Finally, the criterion for modal type discrimination and the optimization objective of vertical decoupling-degree are summarized, and based on which an optimization on mount stiffness is conducted. The results show that the amplitude-frequency characteristics of hydraulic mount dynamic stiffness have a great influence on the vertical, torsional and rolling modes of the system, while the other modes are basically unaffected, and the optimized mount stiffness meet the requirements of vibration isolation.

引文

[1] 上官文斌,吕振华.汽车动力总成液压悬置液-固耦合非线性动力学仿真[J].机械工程学报,2004,40(8):80-85.
    [2] 杨蔚,史文库,马利红,等.汽车动力总成液压悬置参数试验研究[J].汽车工程,2014,36(7):894-898.
    [3] BARSZCZ B,DREYER T,SINGH R.Experience study of hydraulic engine mounts using multiple inertia tracks and orifices:narrow and broad band tuning concepts[J].Journal of Sound and Vibration,2012,331(24):5209-5223.
    [4] PARK J Y,SINGH R.Role of spectrally varying mount properties in influencing coupling between powertrain motions under torque excitation[J].Journal of Sound and Vibration,2010,329(14):2895-2914.
    [5] HU J F,CHEN W W,HUANG H.Decoupling analysis for a powertrain mounting system with a combination of hydraulic mounts[J].Chinese Journal of Mechanical Engineering,2013,26(4):737-745.
    [6] 宋康.多坐标系下的汽车动力总成悬置系统解耦设计研究[D].北京:北京理工大学,2015.
    [7] 上官文斌,吕振华.液阻型橡胶隔振器非线性特性仿真析分析[J].振动工程学报,2003,16(4):393-398.
    [8] HE S,SINGH R.Estimation of amplitude and frequency dependent parameters of hydraulic engine mount given limited dynamic stiffness measurements[J].Noise Control Engineering Journal,2005,53(6):271-285.
    [9] LEE J H,SINGH R.Nonlinear frequency responses of quarter vehicle models with amplitude-sensitive engine mounts[J].Journal of Sound and Vibration,2008,313(9):784-805.
    [10] 马天飞,胡杰宏,王登峰,等.液压悬置元件幅变特性的研究[J].汽车工程,2013,35(7):604-607.
    [11] 时培成.汽车动力总成悬置系统隔振分析与优化研究[D].合肥:合肥工业大学,2010.
    [12] 沃德·海伦,斯蒂芬·拉门兹,波尔·萨斯.模态分析理论与试验[M].白化同,郭继忠,译.北京:北京理工大学出版社,2001:3-26.