掘进机截齿振动疲劳寿命预估与参数优化  

Vibration Fatigue Life Prediction and Parameter Optimization of Roadheader Picks

作　　者：何洋 李晓豁 席亚兵 He Yang;Li Xiaohuo;Xi Yabing(School of Automobile and Traffic Engineering,Liaoning University of Technology,Jinzhou 121000,China;Department of Mechanical and Electrical Engineering,Guangdong Institute of Arts and Sciences,Zhanjiang 524400,China;Research Institute,Sany Heavy Equipment Co.,Ltd.,Shenyang 110020,China)

机构地区：[1]辽宁工业大学汽车与交通工程学院,辽宁锦州121000 [2]广东文理职业学院机电工程系,广东湛江524400 [3]三一重型装备有限公司研究院,辽宁沈阳110020

出　　处：《机械传动》2024年第5期1-9,共9页Journal of Mechanical Transmission

基　　金：国家自然科学基金项目(59774033);辽宁工业大学博士科研启动基金项目(XB2021004)。

摘　　要：为了确定掘进机截齿的振动疲劳寿命和影响因素,根据截齿的力学模型,建立其动力学方程,计算加速度响应谱,并将其作为截齿振动的激励;依据Miner疲劳损伤原理,借助Workbench对其有限元模型进行模态分析、随机振动分析、响应谱分析,获取截齿的振动应力云图,确定其应力范围为(2.713 2×10~6)~(1.703 5×10~(10))Pa;将分析数据导入nCode模块中分析截齿的振动疲劳寿命,发现位于锥面区域截齿寿命最长,圆弧区其次,柱面区域最低。针对柱面区域振动疲劳寿命较低的截齿,采用粒子群多目标优化算法,以截齿转角为优化目标,获得了最优转角值,可使该区域截齿振动寿命提高一个数量级。最后,通过截齿载荷灵敏度分析,确定载荷频率变化是影响截齿疲劳寿命的重要因素。所得结论对于优化截齿排列图、提高掘进机截齿使用寿命具有重要参考意义。In order to determine the vibration fatigue life and influence factors of picks on roadheaders,according to the mechanical model of the picks,the dynamic equation is established,the acceleration response spectrum of the pick is calculated,and the calculated results are used as the vibration excitation to picks.According to the Miner fatigue damage principle and with the help of Workbench,the modal analysis,random vibration analysis and response spectrum analysis of its finite element model are carried out to obtain the stress nephogram of the picks.The stress range of the picks is from 2.7132×106 Pa to 1.7035×1010 Pa.The data are imported into the nCode to analyze the vibration fatigue life of picks.The results show that the longest life of the pick is located at the slope area,the second in the arc area,and the lowest in the cylinder area.The corner of the pick is defined as the optimization objective based on particle swarm optimization algorithm,the optimal corner value is obtained,and the life of the picks is increased by an order of magnitude.Finally,through the load sensitivity analysis of the picks,in which the change of the load frequency is an important factor affecting the fatigue life of the picks.The conclusion is important for optimizing the arrangement diagram and improving the life of the picks.

关 键 词：掘进机 截齿 疲劳 振动 

分 类 号：TD421.5[矿业工程—矿山机电]