牛蒡收获机的有限元模态试验与分析  

Finite Element Mode Analysis and Experiment of Burdock Harvester

作　　者：吕宏靖[1,2] 王瑞丽[1] 邱立春[1] 张旭东[3] 

机构地区：[1]沈阳农业大学工程学院,沈阳110161 [2]辽宁省农业机械化技术推广站,沈阳110034 [3]辽宁省农业机械化研究所,沈阳110161

出　　处：《沈阳农业大学学报》2014年第1期52-57,共6页Journal of Shenyang Agricultural University

基　　金：国家自然科学基金项目(51175354);国家公益性行业(农业)科研专项项目(201303125)

摘　　要：针对研制的牛蒡收获机振动收获系统，为进一步优化该系统的作业性能，采用有限元模态分析与试验模态分析相结合的研究方法，获得该系统的前30阶的固有频率，以及各主要工作部件的典型振型。研究结果表明：系统的1~14阶模态（3.3~77Hz）主要表现为挖掘铲和振动连杆的弯振；15~20阶模态（79.47~125.37Hz）表现为扎草刀、支撑臂和振动连杆的弯曲振动；21~30阶模态（153.29~232.55Hz）表现为整机的末端振动，上述模态属性可为系统结构振动特性的描述及整机作业性能的优化提供依据。In order to improve the performance of burdock harvester, the finite element analysis and mode test were conducted, and the first 30 frequencies and corresponding mode shapes were obtained. There were a torsion deformation of shovel and a connecting rod in the first to the fourteenth （3.3-77Hz）modes. There were a torsion deformation of grass cutter, a holding rod and a connecting rod in the fifteenth to the twentieth （79.47-125.37Hz）. There was a slight torsion deformation of whole structure in the twenty-first to the thirtieth （153.29-232.55Hz）. These could be used to analyze the vibration characteristics of the machine and optimize the working system.

关 键 词：有限元法 收获机 农业机械 牛蒡 模态分析 

分 类 号：S225[农业科学—农业机械化工程]