非规则曲面的离散元法分析模型建模软件  

Development of Software for Establishing Analytical Model of Irregular Surfa ces in Discrete Element Method

作　　者：付宏[1] 吕游[1] 徐静[1] 黄山[1] 于建群[2] 

机构地区：[1]吉林大学计算机科学与技术学院,长春130012 [2]吉林大学生物与农业工程学院,长春130025

出　　处：《吉林大学学报（信息科学版）》2012年第1期23-29,共7页Journal of Jilin University（Information Science Edition）

基　　金：国家自然科学基金资助项目(60973090;51175219;11172112);吉林省科技发展计划基金资助项目(20100313)

摘　　要：在采用离散元法分析机械部件与颗粒材料接触作用时,需要建立机械部件(边界)的离散元法分析模型。分析可知,机械部件中与颗粒材料接触作用的零件表面,存在不能用初等解析函数表达的非规则曲面。为此,采用推进波前法(AFT:Advancing Front Technique)进行非规则曲面网格划分,把非规则曲面离散成三角形平面片的组合,同时添加运动属性和材料特性参数,由此建立非规则曲面边界的离散元法分析模型。在对PRO/E软件进行二次开发的基础上,研制了非规则曲面边界建模软件。通过实例验证,初步证明了基于AFT边界建模方法和软件的可行性,为复杂结构机械部件工作过程的仿真分析奠定了基础。It needs to establish analysis models of machine parts （boundaries）,when use DEM（Discrete Element Method） to analyze the contact action between machine parts and granular materials. There ex ist irregular surfaces which can not be expressed by the elementary analytic function in the parts＇ sur- faces which contact with granular materials. The AFT（Advancing Front Technique） was used to mesh and discrete irregular surfaces into the triangle planar units, parameters of movement characters and ma- terial properties were added in the same time, so the DEM analysis models of irregular surfaces was crea- ted. Based on the redevelopment of PRO/E software, the boundary modeling software of irregular sur- faces was developed. By application examples, the feasibility of boundary modeling method and the soft- ware which based on the AFT was validated, which lays foundations for simulation and analysis of work- ing process for machine parts with complex structure.

关 键 词：离散元法 边界建模 非规则曲面 推进波前法 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术]