考虑界面接触的燕尾榫结构局部并联偏差传递建模方法研究  

Research on the Modeling Method of Partial Parallel Deviation Propagation of Dovetail Considering Interface Contact Effect

作　　者：邹斌 刘涛 康贺贺 吴玉萍 李志敏[1] ZOU Bin;LIU Tao;KANG Hehe;WU Yuping;LI Zhimin(School of Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Mechanical and Electrical Engineering,Zhoukou Normal University,Zhoukou 466001,Henan,China;Hunan Aviation Powerplant Research Institute,Aero Engine Corporation of China,Zhuzhou 412002,Hunan,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]周口师范学院机械与电气工程学院,河南周口466001 [3]中国航发湖南航空动力机械研究所,湖南株洲412002

出　　处：《力学季刊》2024年第3期638-651,共14页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金(52005334,51775346);国家科技重大专项基础研究项目(779608000000200007)。

摘　　要：燕尾榫是航空发动机中重要的连接结构,其装配精度直接影响整机的性能和稳定性.然而,叶盘燕尾榫结构服役于高温高压高转速的极端工作环境,其装配界面会发生弹性或塑性接触变形影响几何偏差的传递.为探究燕尾榫界面接触对结构偏差传递的影响机制,首先,本文简要介绍了基于雅克比旋量模型的串联结构偏差传递分析方法.其次,基于奇异积分方程的数值解法实现了非对称平压头接触的界面接触力学分析,构建了界面传递等效旋量.在此基础上,利用最小势能原理将界面接触变形纳入偏差分析中,提出了考虑界面接触的燕尾榫结构局部并联偏差传递建模方法.最后,以燕尾榫结构为例,将提出的方法与传统方法进行对比,验证了提出方法的可行性和准确性,并研究了不同转速和风压下界面接触对燕尾榫偏差传递的影响.研究结果证明了燕尾榫界面接触变形对结构偏差传递的显著影响,并为其他机构的偏差传递分析提供了一种可行方法.The dovetail is an important connecting structure in aero-engine,and its assembly accuracy directly affects the performance and stability of the whole aircraft.However,dovetails are subjected to harsh working environments of high temperature/pressure loads and high rotation,and their assembly interfaces are subjected to elastic or plastic contact deformation,which affects the structural deviation propagation.In order to investigate the influence of the dovetail interface contact on the structural deviation propagation,firstly,in this paper we briefly introduce the tolerance analysis method of series structure based on Jacobian-Torsor model.Secondly,the interface contact mechanics analysis of asymmetric flat punch contact is realized based on the numerical solution of singular integral equation,and its equivalent torsor is constructed.On this basis,the interfacial contact deformation is incorporated into the deviation analysis by using the principle of minimum potential energy,and the partial parallel deviation propagation modeling method of dovetail considering interfacial contact is proposed.Finally,the proposed method is compared with the traditional method by taking the dovetail as an example to verify the feasibility and accuracy of the proposed method.The effect of interface contact on the deviation propagation of dovetail under different rotational speeds and wind pressures is investigated.The results demonstrate the significant effect of dovetail interface contact deformation on the deviation propagation and provide a feasible method for the deviation propagation analysis of other mechanisms.

关 键 词：燕尾榫 界面接触 奇异积分方程 雅克比旋量模型 偏差传递 

分 类 号：O343.2[理学—固体力学]