自适应丘陵山地拖拉机虚拟设计及仿真分析  

Virtual Design and Simulation Analysis of Adaptive Hilly Mountain Tractor

作　　者：简鸿亮 张静[1] 刘昱 郑德聪[1] 李志伟[1] JIAN Hongiang;ZHANG Jing;LIU Yu;ZHENG Decong;LI Zhiwei(College of Agricultural Engineering,Shanxi Agricultural University,Taigu 030801,China)

机构地区：[1]山西农业大学农业工程学院,山西太谷030801

出　　处：《山西农业科学》2023年第8期935-941,共7页Journal of Shanxi Agricultural Sciences

基　　金：山西省重点研发计划重点项目子课题一(201903D211005-1)。

摘　　要：为进一步解决丘陵山地拖拉机易倾翻、通过性差等问题,利用虚拟样机技术对自适应丘陵山地拖拉机底盘模型进行模拟仿真分析,结合丘陵山地田间作业特点,考虑实际作业要求,用SolidWorks软件建立自适应丘陵山地拖拉机底盘三维简化模型,在ADAMS/View环境中模拟实际作业工况进行侧倾稳定性和越障性能分析,并利用ANSYS Workbench软件对车架纵梁及轮边传动箱等关键零部件在整机结构上进行有限元仿真分析。结果表明,自适应丘陵山地拖拉机底盘的最大侧倾稳定角为37.5°,大于标准要求的35°,符合丘陵山地作业要求;单侧越障100 mm障碍时,四轮始终同时着地并且紧贴路面,双轮越障100 mm障碍时,左右车轮同时同步越障,车身保持平稳状态,其具有良好的作业稳定性和障碍通过性。对关键零件进行有限元分析得出,车架纵梁与动力传输位置应力最大为3.0022 MPa,形变位移量为1.2896×10^(-3)mm;轮边传动箱和驱动桥链接处应力最大为30.2290 MPa,其形变位移量为2.8104×10^(-2)mm;关键部位所受应力均小于材料的屈服极限235 MPa,形变位移量对整机影响可忽略不计。整机仿形效果良好,均在安全使用范围,可以满足丘陵山地的使用要求。In order to further solve the problems such as easy toppling and poor passability of hilly mountain tractor,in this study,virtual prototype technology was used to simulate and analyze the adaptive hilly mountain tractor chassis model.Combined with the characteristics of hilly mountain field operation and considering the actual operation requirements,SolidWorks software was used to establish a three-dimensional simplified model of adaptive hilly mountain tractor chassis.The actual working conditions were simulated in ADAMS/View environment to analyze the roll stability and obstacle crossing performance,and the finite element simulation analysis was carried out on the whole machine structure of the key components such as the longitudinal beam of the frame and the wheel transmission box by ANSYS Workbench software.The results show that the maximum roll stability angle of the adaptive hilly mountain tractor chassis was 37.5°,which was greater than the specified 35°,which met the requirements of hilly and mountainous operation.When crossing the 100 mm obstacle on one side,the four wheels always landed at the same time and kept close to the road;when crossing the 100 mm obstacle on two wheels,the left and right wheels simultaneously crossed the obstacle,and the body maintained a stable state,which had good operational stability and obstacle passability.In the finite element analysis of key parts,the maximum stress of frame longitudinal beam and power transmission position was 3.0022 MPa,and the deformation displacement was 1.2896×10^(-3) mm.The maximum stress at the link between the wheel transmission box and the drive axle was 30.2290 MPa,and the deformation displacement was 2.8104×10^(-2) mm.The stress on the key parts was less than the yield limit of 235 MPa,and the influence of deformation displacement on the whole machine could be ignored.The shape of the whole machine was good,all in the reasonable use of safe range,meeting the requirements of the use in hilly mountains.

关 键 词：自适应丘陵山地拖拉机底盘 侧倾稳定性 虚拟样机技术 有限元分析 

分 类 号：S219.85[农业科学—农业机械化工程]