滚筒-连杆组合式草方格铺设打散机构的仿真分析与试验  

Simulation analysis and test of a roller⁃linkage combination type grass square laying and dispersing mechanism

作　　者：郭佳辉 孙步功 祁渊 张鹏 余伟军 王正宇 徐先英[2] 马新兵[2] GUO Jiahui;SUN Bugong;QI Yuan;ZHANG Peng;YU Weijun;WANG Zhengyu;XU Xianying;MA Xinbing(College of Mechanical and Electrical Engineering,Gansu Agricultural University,Lanzhou 730070,China;Gansu Desert Control Research Institute,Lanzhou 730070,China)

机构地区：[1]甘肃农业大学机电工程学院,兰州730070 [2]甘肃省治沙研究所,兰州730070

出　　处：《中国农业大学学报》2025年第3期185-196,共12页Journal of China Agricultural University

基　　金：甘肃省重大科技计划项目(21ZD4FA010)。

摘　　要：针对以散放稻草为原料的草方格沙障铺设作业过程中秸秆打散不均匀、铺设厚度不符合技术要求等问题,基于多体动力学和离散元耦合方法对秸秆打散、输送过程进行仿真分析;以滚筒转速、滚筒间距和曲柄转速为影响因素,以打散后输送板上秸秆平均厚度和秸秆均匀度为响应值,通过预试验和单因素试验确定各因素对响应值的影响规律,基于前期试验进行响应面优化试验,使用Design-Expert软件建立二次多项式回归模型。以草方格沙障铺设要求范围内的秸秆平均厚度最低和秸秆均匀度最高作为目标值,通过响应面进行优化求解。仿真试验结果表明:滚筒转速为68.98 r/min,滚筒间距184.7 mm,曲柄转速90.63 r/min,打散装置性能最优。台架试验结果与仿真理论值相比,秸秆平均厚度误差为2.89%,秸秆均匀度误差为1.96%。Aiming at the problems of uneven straw dispersal and non-compliance of laying thickness during the sand barrier laying operation of the straw square lattice with loose straw as raw material,a simulation analysis of straw dispersal and conveying process was carried out based on the multi-body dynamics and discrete element coupling method.Taking the roller rotational speed,roller spacing and crank rotational speed as the influencing factors,and the average thickness of the straw on the conveying plate and the uniformity of straw after dispersal as the response values,a response surface optimization test was carried out based on the pre-tests and the single-factor test to determine the influencing law of each factor on response values.Pre-test and single-factor test were used to determine the influence law of each factor on the response value.Based on preliminary tests,a response surface optimization test was conducted using Design-Expert software to establish a quadratic polynomial regression model.The lowest average thickness of straw and the highest uniformity of straw within the range of grass square sand barrier laying requirements were taken as the target values,and the optimization solution was carried out through the response surface.The simulation test results showed that the performance of the dispersing device was optimal with a roller speed of 68.98 r/min,a roller spacing of 184.7 mm and a crank speed of 90.63 r/min.Compared with the simulated theoretical values,the error of the average thickness of straw in the bench test was 2.89%,and the error of straw uniformity was 1.96%.

关 键 词：打散机构 草方格 DEM-MBD 仿真优化 

分 类 号：S288[农业科学—农业水土工程]