基于SPH法的植保机高花纹轮牵引性能研究  

Research on tractive performance of the wheel with high tread patterns of fog machine based on SPH method

作　　者：康宏彬[1,2] 刘嘉程 周敬东 陈正[1,2] Kang Hongbin;Liu Jiacheng;Zhou Jingdong;Chen Zheng(Hubei University of Technology,Wuhan,430068,China;Hubei Agricultural Machinery Engineering Research and Design Institute,Wuhan,430068,China)

机构地区：[1]湖北工业大学,武汉市430068 [2]湖北省农业机械工程研究设计院,武汉市430068

出　　处：《中国农机化学报》2020年第2期39-45,72,共8页Journal of Chinese Agricultural Mechanization

基　　金：国家重点研发计划(2017YFD0700905)。

摘　　要：植保机存在水稻田土壤时行走困难,牵引性能差等问题,以植保机高花纹驱动轮为研究对象,基于SPH(光滑流体粒子动力学法)建立植保机驱动轮-土壤有限元模型,以植保机高花纹轮结构参数中花纹深度,花纹倾斜角及花纹宽度为三个因素,以挂钩牵引力和牵引效率为牵引性能指标,利用ANSYS显式动力学求解模块LS-DYNA对驱动轮在水稻田土间行走进行仿真分析,通过正交试验法分析各因素对驱动轮土壤间行走牵引性能的影响规律,经过多目标优化,花纹深度50 mm、花纹倾斜角为80°、花纹宽度121.87 mm时可以获得最优的牵引性能,较原始值挂钩牵引力提高249 N,牵引效率提高15.51%,该结果为后期的驱动轮结构设计优化提供参考。Traction performance of fog machine was insufficient when it walking in paddy field. This paper takes the driving wheel with high tread patternsof fog machine as the research object. Establishingfinite element model of interaction between driving wheel and soil based on SPH. The pattern depth, pattern tilt angle and pattern width are taken as three factors. Takingdrawbar-pull and tractive efficiency as indicators. Using LS-DYNA which is an ANSYS explicit algorithm solver tosimulatemodel of driving wheel walking in paddy field. The influence of various factors on the traction performance was analyzed by orthogonal test method. After multi-objective optimization,when the pattern depth is 50 mm, the pattern inclination angle is 80°, and the pattern width is 121.87 mm, the value oftractive performance can be optimal. The drawbar-pull is increased by 249 N compared with the initial value, and the tractive efficiency is improved by 15.51%. This result provides a reference for the design optimization of the later drive wheel structure.

关 键 词：高花纹轮 牵引性能 挂钩牵引力 光滑粒子流体动力学法 车辆地面力学 

分 类 号：S232.3[农业科学—农业机械化工程]