基于雅可比旋量统计法的发动机三维公差分析  

Three-dimensional tolerance analysis of engine based on Jacobian-Torsor statistical model

作　　者：陈华[1] 唐广辉 陈志强 李志敏[1] 金隼[1] 

机构地区：[1]上海交通大学上海市复杂薄板结构数字化制造重点实验室,上海200240 [2]上汽通用五菱汽车股份有限公司,广西柳州545007

出　　处：《哈尔滨工程大学学报》2014年第11期1397-1402,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51121063;51175340);"十二五"国家科技支撑计划资助项目(2012BAF06B03)

摘　　要：为了在发动机装配体的公差分析中考虑传统尺寸链无法处理的几何公差信息,以发动机的做功机构为分析对象,引入雅可比旋量模型,建立在尺寸和形位公差约束下的特征及其配合旋量的变动和约束方程。将其融入到蒙特卡洛算法中,实现发动机做功机构的三维统计公差分析。与传统分析方法相比,基于雅克比旋量模型的分析方法考虑了更多的几何公差信息,分析结果也更加精确,该模型可以从尺寸链角度建立发动机零部件公差与整机性能的映射关系。The working mechanism of an engine is the target of analysis in order to consider geometric tolerances which cannot be handled by traditional tolerance chains in engine assemblies. The Jacobian-Torsor model is introduced, and variations and constraints of torsors for features and their joints under the restrictions of size and geometric tolerances are built. Based on Monte Carlo simulation, three-dimensional tolerance analysis for working mechanism with a statistical way is achieved. Compared with traditional tolerance analysis methods, the rrethod based on the Jacobian-Torsor statistical model takes more geometric tolerances into consideration and obtains more accurate results. This model can build the relationship between tolerances of parts and engine performance frown tolerance chains perspectives.

关 键 词：雅可比旋量 统计法 三维公差分析 做功机构 发动机 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]