工程设计学报2017，Vol.24Issue(3)：264-272,9.DOI:10.3785/j.issn.1006-754X.2017.03.004
机械结构相似度评价及可靠性预计研究
Research on similarity evaluation and reliability prediction of mechanical structure
摘要
Abstract
The differences between the selected similar products and evaluation object will lead to the deviation of the expected results w hen the reliability prediction is carried out by the traditional similar comparison method .In order to solve this problem ,a new method of reliability prediction based on"function-movement-action"structural decomposition was proposed .A"function-move-ment-meta-action units" hierarchical model was established for reliability prediction with steps by the means of establishing function layer by analysing the product's all functions ,establishing movement layer by analysing components' movements that completed corresponding functions of function layer ,and establishing meta-units layer by analysing meta-actions that completed corre-sponding components' movements of movement layer . The interval analytic hierarchy process (AHP) was introduced to determine the weights that reflected the influence degree of offspring motion units to parent motion units .And a mathematical model was constructed to predict paren-tal motion units' reliability from offspring motion units .The factors were determined that affected similarity evaluation process ,so as to construct interval comprehensive evaluation cloud model to evaluate similarity between meta-action units and mechanical structures ,and the most similar mechanical structures were chosen as referential structures .And the similarity value was used that concluded from interval comprehensive evaluation cloud model to correct the reliability data of referential structures .Then the corrected reliability data were used to predict every meta-ac-tion units' reliability of the meta-units layer .The reliability prediction value of the unit of motion was substituted into the mathematical model ,so the parental motion units' reliability were predic-ted from offspring motion units layer by layer ,so as to obtain the whole product's reliability pre-diction value .At last ,numerical control rotary table was taken as a case to illustrate the feasibili-ty and accuracy by using the proposed method .T he reliability prediction value w as obtained and compared with the traditional method .The result shows that this new reliability prediction meth-od has better feasibility and higher accuracy .关键词
相似度评价/可靠性预计/云模型/区间层次分析法Key words
similarity evaluation/reliability prediction/cloud model/interval analytic hierarchy process分类
通用工业技术引用本文复制引用
张根保,徐付伟,冉琰,章小刚..机械结构相似度评价及可靠性预计研究[J].工程设计学报,2017,24(3):264-272,9.基金项目
国家自然科学基金资助项目(51575070 ,51305418 ) （51575070 ,51305418 ）
国家科技重大专项(2014ZX04001-031 ,2015ZX04003003-07 , 2015 Z X 04003003 ) （2014ZX04001-031 ,2015ZX04003003-07 , 2015 Z X 04003003 ）
