产品仿真分析中曲面不均匀分布载荷施加方法  

Method for Asymmetric Distributed Loads on Curving Areas in Products Simulation Analysis

作　　者：林小夏[1] 张树有[1] 陈婧[1] 薛杨[1] 

机构地区：[1]浙江大学流体传动及控制国家重点实验室,杭州310027

出　　处：《机械工程学报》2010年第1期122-127,共6页Journal of Mechanical Engineering

基　　金：国家高技术研究发展计划(863计划;2006AA04Z114);国家科技支撑计划(2006BAF01A45-09);国家自然科学基金(50775201)资助项目

摘　　要：针对复杂零件有限元分析中,曲面不均匀分布载荷难以施加等问题,提出基于特征函数分布的曲面有限元加载方法。给出载荷特征函数的基本概念,基于载荷特征函数分别对自由曲面以及圆柱面不均匀分布载荷的加载进行研究。将曲面离散为小单元的网格面,根据载荷分布特征函数与曲面的形状,计算出曲面上各网格或者节点所受的载荷,自动将载荷离散并映射到需要加载的曲面上。该方法对叶轮叶片表面不均匀分布载荷的加载等进行应用验证,验证结果表明该方法是稳定可靠的,可快速实现自由曲面与圆柱面不均匀分布载荷的施加,有效地解决复杂零件有限元处理中不均匀面载荷的加载问题。In order to solve the problem of asymmetric distributed loads on curving areas, and improve the efficiency and quality in complicated products finite element method （FEM） analysis, the method for asymmetric distributed loads on curving areas based on the eigenfunction distribution of FEM is put forward. The basic concept of loading eigenfunction is presented. The loading of asymmetric distributed loads on unrestricted curving areas and cylindrical areas is researched. The curving areas are discretized into small-unit grids. The load on the grids （or nodes） of unrestricted curving areas can be calculated automatically according to the eigenfunction of load distribution and the shape of curving areas. The method is proved to be steady and reliable through the experiment of putting the asymmetric distributed loads on the impeller curving areas. The loading of asymmetric distributed loads on unrestricted curving areas and cylindrical areas can be implemented faster by using this method, and the FEM analysis of uneven surface load in complicated products can be solved effectively.

关 键 词：特征函数 自由曲面 散射加载 有限元法 仿真分析 

分 类 号：TP391.73[自动化与计算机技术—计算机应用技术] TP391.9[自动化与计算机技术—计算机科学与技术]