植树挖坑机钻头纵向振动系统动力学模型建立与求解  

Establishment and solution on dynamics model of longitudinal vibration system in the auger bit of tree planting digger

作　　者：孟庆华[1] 于建国[1] 

机构地区：[1]东北林业大学机电工程学院

出　　处：《机械设计》2007年第3期36-38,50,共4页Journal of Machine Design

基　　金：教育部博士学科点专项科研基金资助项目(20040225005)

摘　　要：介绍了国内外机械化植树造林机械发展状况,指出国内植树用挖坑机研究重点,利用空间运动学、机械振动理论及弹性动力学原理,着重分析建立钻头纵向振动模型并用数值方法进行了求解,同时系统地分析了钻头下端部件与土壤的相互作用力、钻头升土、惯性力及外激励等因素的影响。为钻头动力学特性仿真及整机动态特性研究提供理论基础,为合理预测和控制钻头的运动规律,改善钻头的动力学特性,提高钻头工作效率及改进设计方法提供了新的理论依据。This paper introduced the development status of mechanized tree planting forestation at home and abroad and pointed out the emphasis of research on domestic digging machine used for tree planting. Utilizing the spatial kinematics, the theory of mechanical vibration and the principle of elastic dynamics, the longitudinal vibration model of auger bit was emphatically analyzed and established, and carried out the solution with numerical value method. In the mean time the influences affected by factors of the mutual acting force between the parts at the lower end of auger bit and the soil, the rising of soil by the auger bit, the inertial force and external excitation were systematically analyzed. The result of study provided theoretical basis for the dynamics characteristic simulation of auger bit and the dynamic characteristics research of the whole machine; and offered new theoretical foundations for rationally predicting and controlling the motion rule of auger bit, ameliorating the dynamics property of auger bit, enhancing its work efficiency and improving the designing method.

关 键 词：挖坑机 钻头主轴 纵向振动 数值解 

分 类 号：TH122[机械工程—机械设计及理论]