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

Guang ZHAO; Yongquan WANG; Xiangyang ZHAO; Shengxiang LI; Guangrong TENG

doi:10.13224/j.cnki.jasp.20210065

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

Structure,Strength and Vibration | 更新时间：2025-04-07

- Modeling and application test of contact stiffness of bolt connection structure of disk and drum
- Journal of Aerospace Power Vol. 37, Issue 1, Pages: 76-86(2022)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.13224/j.cnki.jasp.20210065
  CLC：
- 稿件说明：
移动端阅览
Guang ZHAO, Yongquan WANG, Xiangyang ZHAO, et al. Modeling and application test of contact stiffness of bolt connection structure of disk and drum[J]. Journal of Aerospace Power, 2022, 37(1): 76-86.
DOI：

Guang ZHAO, Yongquan WANG, Xiangyang ZHAO, et al. Modeling and application test of contact stiffness of bolt connection structure of disk and drum[J]. Journal of Aerospace Power, 2022, 37(1): 76-86. DOI： 10.13224/j.cnki.jasp.20210065.

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。

Abstract

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.

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references

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