农机发动机叶片复杂零件的有限元网格生成方法研究  

Research on Mesh Generation Method of Finite Element of Complex Parts of Agricultural Engine Blades

作　　者：毛丹丹[1] 刘志刚[2,3] 

机构地区：[1]柳州职业技术学院机电工程学院,广西柳州545006 [2]南昌工学院,南昌330108 [3]南昌大学,南昌330031

出　　处：《农机化研究》2018年第4期252-256,共5页Journal of Agricultural Mechanization Research

基　　金：江西省教育厅科学技术研究项目(GJJ150156);广西高校科学技术研究项目(2013YB356)

摘　　要：随着现代农机体积的不断增大,发动机的功率和散热问题成为制约农机发展的主要因素之一。为了提高农机发动机的散热效率,提出了一种基于有限元仿真的发动机风扇优化方法。由于发动机风扇属于复杂零件,引入了一种复杂零件的三维六面体网格划分方法,主要采用有限元模型和网格规划的原理,对复杂模型进行网格分块,最后通过网格整合有效地提高了有限元网格划分的效率和精度。为了验证网格划分方法对复杂机械零部件有限元网格划分的可靠性,以重型农机发动机散热风扇叶片的有限元网格划分和仿真模拟为例,对网格划分方法的可靠性进行了验证。有限元仿真表明:采用这种网格划分方法可以有效地实现复杂零件的三维网格划分。同时,将生成的网格代入到有限元软件中进行了仿真计算,将计算结果和实验测试结果进行了对比发现:仿真结果和实验结果基本吻合,从而验证了网格划分的可靠性。With the increasing volume of modern agricultural machinery,power and heat dissipation of the engine has become one of the main factors restricting the development of agricultural machinery. In order to improve the cooling efficiency of agricultural engine,it presents an engine fan optimization method based on finite element simulation. Because the engine fan belongs to complex parts,taking three-dimensional hexahedral meshes into a complex parts,the method is the main principle of the finite element model and mesh planning,model of complex mesh block. Finally,it effectively improves the efficiency and accuracy of the finite element mesh through the mesh integration. In order to verify the reliability of finite element mesh division method of complex mechanical parts mesh,taking heavy machinery of engine cooling fan blade finite element mesh and simulation as an example,the reliability of mesh method is verified by finite element simulation show that the 3D mesh can effectively realize complex parts the generated mesh into the finite element software was simulated with the mesh generation method. The calculated results and the experimental results were compare. By comparison,simulation results and experimental results are basically consistent,which verifies the reliability of the mesh.

关 键 词：重型农机 发动机叶片 复杂零件 有限元 网格生成 

分 类 号：S220.6[农业科学—农业机械化工程] S220.3[农业科学—农业工程]