考虑运动副间隙的机构动态特性研究
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摘要
为了研究运动副间隙对机构动态特性的影响,基于"连续接触"模型,建立改进的非线性接触碰撞模型。间隙处的摩擦用修正的库伦力摩擦模型描述,转动副之间的间隙用矢量杆等效。以内燃机曲柄滑块机构为例,在ADAMS中建立含间隙模型,采用接触碰撞函数的算法,定量分析间隙对机构动力学特性的影响,验证理论值与仿真结果的可靠性,为含间隙机构的分析、设计与寿命预测奠定理论基础。
In order to study the influence of the joint clearance on mechanism dynamic characteristic,an improved nonlinear contact collision model is established on the basis of continuous contact model,the modified Coulomb force friction model is used to describe the friction force at clearance joints,and the revolute clearance joints can be equivalent with vector stick. Taking the slider-crank mechanism of internal combustion engine as an example,the model with clearance is established in ADAMS,and the algorithm of contract collision function is used to quantitatively analyze the influence of the joint clearance on mechanism dynamic characteristic. It is verified that the theoretical value and simulation result are reliable,which lays a theoretical foundation for the analysis,design and life prediction of the clearance mechanism.
In order to study the influence of the joint clearance on mechanism dynamic characteristic,an improved nonlinear contact collision model is established on the basis of continuous contact model,the modified Coulomb force friction model is used to describe the friction force at clearance joints,and the revolute clearance joints can be equivalent with vector stick. Taking the slider-crank mechanism of internal combustion engine as an example,the model with clearance is established in ADAMS,and the algorithm of contract collision function is used to quantitatively analyze the influence of the joint clearance on mechanism dynamic characteristic. It is verified that the theoretical value and simulation result are reliable,which lays a theoretical foundation for the analysis,design and life prediction of the clearance mechanism.
引文
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[9] LIU C S,ZHANG K,YANG R. The FEM analysis and approximate model for cylindrical joints with clearances[J]. Mechanism&machine theory,2007,42(2):183-197.
[10] GONTHIER Y,MCPHEE J,LANGE C,et al. A regularized contact model with asymmetric damping and dwell-time dependent friction[J]. Multibody system dynamics,2004,11(3):209-233.
[11] KOSHY C S. Characterization of mechanical systems with real joints and flexible links[D]. US:Wichita State University,2006.
[2]耿德宁,郑长松,李春生,等.污染微粒对滚针轴承润滑影响规律理论研究[J].润滑与密封,2015,40(2):60-63.GENG Dening, ZHENG Changsong, LI Chunsheng, et al.Theoretical research on the influence of pollution particles on the lubrication of needle bearings[J]. Lubrication and sealing,2015,40(2):60-63
[3]黄华军,张春,金鑫,等.含运动副间隙的涡旋压缩机动平衡仿真研究[J].振动与冲击,2016,35(5):125-130.HUANG Huajun,ZHANG Chun,JIN Xin,et al. Simulation study on eddy compression dynamic equilibrium with clearance of moving pairs[J]. Vibration and impact,2016,35(5):125-130.
[4]张增磊,巫世晶,赵文强,等.含间隙高速多连杆传动机构动力学特性研究[J].振动与冲击,2014,33(14):66-71.ZHANG Zenglei,WU Shijing,ZHAO Wenqiang,et al. Study on dynamic characteristics of high-speed multi-link drive mechanism with clearance[J]. Vibration and impact,2014,33(14):66-71.
[5]黄海洋,李艳,井超超,等.运动副间隙振动状态实验研究[J].北京印刷学院学报,2010,18(4):16-18.HUANG Haiyang,LI Yan,JING Chaochao,et al. Experimental study on the vibration state of the clearance of the moving pair[J]. Journal of Beijing Institute of Graphic Communication,2010,18(4):16-18.
[6]侯雨雷,张占叶,李明洋,等.一种含间隙解耦并联机构动力学分析与混沌现象辨识[J].振动与冲击,2016,35(8):211-218.HOU Yulei,ZHANG Zhanye,LI Mingyang,et al. Dynamic analysis and chaotic phenomenon identification of parallel mechanism with clearance decoupling[J]. Vibration and impact,2016,35(8):211-218.
[7]陈予恕.非线性振动、分叉和混沌理论及其应用[J].振动工程学报,1992(3):235-250.CHEN Yushu. Nonlinear vibration bifurcation and chaos theory and its application[J]. Journal of vibration engineering,1992(3):235-250.
[8]姜俊昭,卢剑伟,张辉,等.考虑间隙运动副耦合作用的车辆摆振动力学行为分析[J].振动与冲击,2016,35(1):66-69.JIANG Junzhao,LU Jianwei,ZHANG Hui,et al. Dynamic behavior analysis of vehicle pendulum vibration considering coupling of clearance motion[J]. Vibration and impact,2016,35(1):66-69.
[9] LIU C S,ZHANG K,YANG R. The FEM analysis and approximate model for cylindrical joints with clearances[J]. Mechanism&machine theory,2007,42(2):183-197.
[10] GONTHIER Y,MCPHEE J,LANGE C,et al. A regularized contact model with asymmetric damping and dwell-time dependent friction[J]. Multibody system dynamics,2004,11(3):209-233.
[11] KOSHY C S. Characterization of mechanical systems with real joints and flexible links[D]. US:Wichita State University,2006.