棉秆有限元模型构建及切割参数标定  

Construction of Finite Element Model of Cotton Pole and Calibration of Cutting Parameters

作　　者：郑超 赵金[1,2] 张晋国 张瑞星[3] 李峰涛 Zheng Chao;Zhao Jin;Zhang Jinguo;Zhang Ruixing;Li Fengtao(Cotton industry Collaborative Innovation Center of Hebei,Baoding 071001,China;College of Mechanical and Electrical Engineering,Agricultural University of Hebei,Baoding 071001,China;Hebei Shuang Tian Machinery Manufacturing Co.Ltd.,Dingzhou 073000,China)

机构地区：[1]河北省棉花产业协同创新中心,河北保定071000 [2]河北农业大学机电工程学院,河北保定071000 [3]河北双天机械制造有限公司,河北定州073000

出　　处：《农机化研究》2021年第8期198-203,共6页Journal of Agricultural Mechanization Research

基　　金：河北省棉花产业协同创新中心项目(2014-2019);国家重点研发计划粮食丰产增效科技创新专项(2017YFD0300907)。

摘　　要：为了给棉花打顶机械设计提供参数,利用复合材料力学知识建立了打顶时期棉秆的力学模型,获得其力学参数,并按不同方向进行了压缩和弯曲力学试验。采用HY-0580微型机电子万能力学试验机进行了不同组分的试验,所有机械弹性参数应用复合材料理论分析计算,确定了打顶时期顶部棉秆轴向压缩弹性模量:E_(Z)=11.25MPa,径向压缩弹性模量E_(X)=E_(Y)=3.81MPa,异性面弯剪模量G_(XZ)=G_(YZ)=0.605MPa,同性面弯剪模量G_(XY)=4.32MPa。利用三维实体建模软件建立切割棉秆模型,导入有限元分析软件ANSYS中进行显示动力学分析,采用Box-Behnken模型试验法对影响切割功耗因素进行优化试验研究,建立了切割功耗与刀片刃角、刀片转速与前进速度的二次回归模型。对模型响应曲面分析寻优,得到最佳结构及作业参数,即在刀片刃角31°、转速3394.6r/min、前进速度1.8km/h时,切割功耗为1.6kW。In order to provide mechanical parameters for the study of cotton topping machinery, the mechanical model of cotton pole during topping was established by using the knowledge of composite material mechanics. The mechanical parameters were obtained and the compression and bending tests were carried out in different directions. The test of different components was carried out by hy-0580 microcomputer electronic universal mechanical testing machine. All mechanical elastic parameters are determined by composite material theory, through analysis and calculation, the axial compression elastic modulus E_(Z)=11.25 MPa, radial compression elastic modulus E_(X)=E_(Y)=3.81 MPa, opposite plane bending shear modulus G_(XZ)=G_(YZ)=0.605 MPa, same plane bending shear modulus G_(XY)=4.32 MPa. The three-dimensional solid modeling software is used to establish the cutting cotton pole model, which is imported into the finite element analysis software ANSYS for display dynamics analysis. The box Behnken model test method is used to optimize the factors affecting the cutting power consumption. The quadratic regression model of cutting power consumption and blade angle, blade speed and forward speed is established. The response surface of the model is analyzed and optimized to get the best structure and operation parameters. The results show that the cutting power consumption is 1.6 kW when the cutting edge angle is 31°, the rotating speed is 3394.6 r/min and the forward speed is 1.8 km/h.

关 键 词：棉秆 压缩 弯曲 复合材料 Box-Behnken模型 

分 类 号：S183[农业科学—农业基础科学]