摘要
机构由于装配的需要和制造加工精度的限制,其运动副普遍存在间隙,探究间隙对机构动力学的影响具有重要意义。针对含间隙的曲柄滑块机构,基于L-N运动副接触力数学模型计算接触力,构建了包含多组间隙的曲柄滑块机构的动力学模型。利用Matlab和Adams开展仿真实验,研究了间隙的数目、位置和大小等变量对机构输出性能的影响。利用相轨迹图、庞加莱(Poincare)映射法和李雅普诺夫(Lyapunov)指数对间隙机构的混沌现象进行辨识,分析了不同间隙情况下机构运动副存在的混沌运动规律。此研究工作对多间隙工况下机构动力学特性分析具有一定的指导意义。
Due to the need of self-assembly and the limitation of manufacturing precision,there are clearances in the kinematic pair of the mechanism.It is of great significance to explore the influence of clearances on the dynamics of the mechanism.Aiming at the slider-crank mechanism with clearance,the contact force is calculated based on the contact force mathematical model of Lankarani-Nikravesh kinematic pair,and the dynamic model of the slider-crank mechanism with multiple sets of clearance is constructed.The simulation is carried out by Matlab and Adams to explore the influence of the number,position and size of the clearance on the output performance of the mechanism.The phase trajectory diagram,Poincare mapping method and Lyapunov index,are used to identify the chaotic phenomena of the clearance mechanism,and the chaotic motion law of the kinematic pair of the mechanism under different clearances is analyzed.The research work has certain guiding significance for the dynamic characteristics analysis of the mechanism under multi-clearance conditions.
作者
王航
郑雪山
周挺
张国兴
侯雨雷
曾达幸
WANG Hang;ZHENG Xueshan;ZHOU Ting;ZHANG Guoxing;HOU Yulei;ZENG Daxing(College of Information and Intelligence Engineering,Zhejiang Wanli University,Ningbo 315100,China;School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China;School of Mechanical Engineering,Dongguan University of Technology,Dongguan 523000,China)
出处
《黑龙江大学自然科学学报》
CAS
2021年第2期218-227,共10页
Journal of Natural Science of Heilongjiang University
基金
国家重点研发计划资助项目(2018YFB1307900)
国家自然科学基金资助项目(51775473)
河北省自然科学基金资助项目(E2018203140,E2019203109)
河北省高等学校科学技术研究重点项目(ZD2019020)
浙江省基础公益研究项目(LGG21E050022)。
关键词
曲柄滑块机构
运动副间隙
动力学建模
混沌运动
slider-crank mechanism
kinematic pair with clearance
dynamic modeling
chaotic motion
