盘鼓螺栓连接结构接触刚度建模与应用检验  

Modeling and application test of contact stiffness of bolt connection structure of disk and drum

作　　者：赵广[1] 王永泉 赵向阳 李盛翔 滕光蓉 ZHAO Guang;WANG Yongquan;ZHAO Xiangyang;LI Shengxiang;TENG Guangrong(School of Energy and Power Engineering,Dalian University of Technology,Dalian Liaoning 116024,China;Sichuan Gas Turbine Establishment,Aero Engine Corporation of China,Mianyang Sichuan 621000,China)

机构地区：[1]大连理工大学能源与动力学院,辽宁大连116024 [2]中国航空发动机集团有限公司四川燃气涡轮研究院,四川绵阳621000

出　　处：《航空动力学报》2022年第1期76-86,共11页Journal of Aerospace Power

基　　金：国家自然科学基金(12172073);中央高校基本科研业务费专项资金(DUT16JJ(G04));国家科技重大专项(779608000000200007)。

摘　　要：针对航空发动机中盘鼓转子螺栓连接结构连接刚度精确建模与工程化应用问题,通过扇形盘鼓螺栓结构固有特性实验获得前6阶固有频率随螺栓预紧力变化关系,考虑螺栓接触面应力分布,基于双薄层单元法获得了扇形盘鼓螺栓连接结构各阶固有频率随薄层单元弹性模量变化规律。通过构建实验与仿真结果误差函数实现接触刚度的识别,并将接触刚度模型推广应用于整圈盘鼓螺栓连接结构中,检验了模型的有效性和通用性。结果表明:基于单螺栓连接的扇形盘鼓结构固有频率测试与仿真建立的接触刚度模型,接触刚度平均识别误差为2.40%,将其应用于整圈盘鼓转子螺栓连接结构中时,仿真与实验平均误差为4.10%,检验了提出的接触刚度模型的普适性。In view of the problem of precise modeling and engineering application of the connection stiffness of the bolt connection structure of the aero-engine disk and drum rotor,the relationship between the first six natural frequencies and the bolt preload was obtained through the inherent characteristics test of the bolt structure of the sectorial disk and drum. Considering the stress distribution on the contact surface of the bolts, the variation of natural frequencies of the bolted structure of the sectorial disk and drum with the elastic modulus of the thin-layer element was obtained based on the double-thin-layer element method.The identification of the contact stiffness was realized by constructing the error function of the test and simulation results,and the contact stiffness model was applied to the bolt connection structure of the whole circle drum,which verified the validity and universatility of the model.The results showed that the contact stiffness model established based on the natural frequency test and simulation of sectorial disk and drum structure connected by single bolt had an average identification error of 2.40%.In the bolted structure of the full disk and drum rotor, the average error between simulation and test was 4.10%,which verified the universality of the proposed contact stiffness model.

关 键 词：盘鼓转子 螺栓连接 接触刚度 刚度识别 薄层单元法 

分 类 号：V232.7[航空宇航科学与技术—航空宇航推进理论与工程]