三维公差建模与敏感度分析  

Three-dimensional tolerance modeling and sensitivity analysis

作　　者：于鹏[1] 孔晓玲[1] 刘素梅[1,2] 陈艳[1] 鲁明宣[2] 

机构地区：[1]安徽农业大学工学院,安徽合肥230036 [2]中国科学院等离子体物理研究所,安徽合肥230031

出　　处：《合肥工业大学学报（自然科学版）》2013年第1期15-19,共5页Journal of Hefei University of Technology：Natural Science

基　　金：中科院等离子体物理研究所国际合作资助项目(4200000119)

摘　　要：文章以托克马克装置的中子屏蔽块中的一典型部件为对象,建立了三维公差模型,针对公差分析中的敏感度数值进行了探讨,线性尺寸的敏感度数值为+1～-1之间;角度尺寸的敏感度数值绝对值可以大于1,也可以为0,敏感度数值的绝对值越大,说明该尺寸对装配精度要求影响越大;通过敏感度数值分析,可了解三维尺寸链中影响装配要求的关键尺寸和非关键尺寸,从而为零部件的精度设计优化提供依据。Taking a typical component in the neutron shielding blocks of tokamak device as the object, a three-dimensional tolerance model is established. Sensitivity coefficient in the tolerance analysis is investigated. The sensitivity coefficient of the linear dimension is in the range of ＋ 1--1. The abso- lute value of sensitivity coefficient of the angle may be greater than 1, it may also be 0. The greater the absolute value of sensitivity coefficient, the greater the assembly accuracy is affected by the di- mension. The critical and non-critical dimensions influencing the assembly requirements are found out by the sensitivity coefficient analysis, which lays a basis for the optimization of components accuracy design.

关 键 词：三维公差模型 敏感度 线性尺寸 非线性尺寸 

分 类 号：TB114.3[理学—概率论与数理统计]