履带式农机底盘在超湿黏土地面的通过性研究

王海霞¹，卢立富^2*，李加坤¹，胡忠义¹，许永超¹

1.山东交通学院汽车工程学院，山东 济南  250357；2.山东泰开隔离开关有限公司，山东 泰安  271000

摘要：为研究履带式农机底盘在超湿黏土地面上的通过性问题，采用仿真分析和试验验证相结合的方法分析某履带式农机底盘在超湿黏土地面上的通过性。原位采集超湿黏土土壤，以土壤硬度为评价指标，实现土壤样本的实验室重构；进行土壤的承压特性和剪切特性试验，获取超湿黏土土壤的力学特性参数；依据某型号履带式农机底盘的具体结构参数，采用软件Recurdyn，结合土壤的力学特性参数，构建履带式农机底盘超湿黏土地面通过性仿真模型，分析履带式农机底盘以5 km/h的速度通过超湿黏土地面时挂钩牵引力的变化情况，以挂钩牵引力为评价通过性的指标，并进行实车验证。结果表明：在超湿黏土地面上作业时，履带式农机底盘挂钩的平均牵引力的仿真结果为20.000 kN，实车验证结果为17.923 kN，仿真结果与试验结果基本一致，仿真结果准确、合理。

关键词：履带式农机底盘；超湿黏土地面；通过性

Passability of tracked agricultural machinery chassis on super wet clay ground

WANG Haixia¹, LU Lifu^2*, LI Jiakun¹, HU Zhongyi¹, XU Yongchao¹

1.School of Automotive Engineering, Shandong Jiaotong University, Jinan 250357, China;

2.Shandong Taikai Isolation Switch Co., Ltd., Taian 271000, China

Abstract:In order to study the passability of tracked agricultural machinery chassis on super wet clay ground,super wet clay soil is collected in situ, and the laboratory reconstruction of soil samples is realized with the soil hardness as the evaluation index. The mechanical properties of super wet clay soil are obtained via the bearing and shear properties test. According to the specific structural parameters of a certain type of tracked agricultural machinery chassis, a simulation model for the passability of the tracked agricultural machinery chassis on the super wet clay ground is constructed with the software Recurdyn and considering the mechanical parameters of soil. The variation of hook traction when the tracked agricultural machinery chassis passes through the super wet clay ground at the speed of 5 km/h is analyzed, and the traction force of the hook is taken as the index to evaluate the passability, and the real vehicle verification is carried out.The results show that the average tractive force of the chassis hook of tracked agricultural machinery is 20.000 kN in simulation and 17.923 kN in real vehicle verification. The simulation results, basically consistent with the test results, are accurate and reasonable.

Keywords:tracked agricultural machinery chassis; super wet clay soil ground; passability