Study on Influencing Factors of Interconnected Structures Fatigue Performance of Wing Box and Its Finite Element Analysis

GAO Pengfei; LIU Defeng; CAI Junjie; WANG Xiaoyang; ZHANG Yanjun; LIU Mabao

doi:10.16080/j.issn1671–833x.2019.11.090

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Study on Influencing Factors of Interconnected Structures Fatigue Performance of Wing Box and Its Finite Element Analysis

更新时间：2025-10-30

- Study on Influencing Factors of Interconnected Structures Fatigue Performance of Wing Box and Its Finite Element Analysis
- Aeronautical Manufacturing Technology Vol. 62, Issue 11, Pages: 90-96(2019)
- 作者机构：
  
  1. 西安交通大学机械结构强度与振动国家重点实验室,西安,710049
  2. 西安交通大学航天航空学院,西安,710049
  3. 航空工业北京长城航空测控技术研究所,北京,101111
  4. 航空工业第一飞机设计研究院,西安,710072
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671–833x.2019.11.090
  CLC：
- Published：2019
- 稿件说明：
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高鹏飞，刘德峰，蔡俊杰，王晓阳，张彦军，刘马宝. 机翼盒段连接结构疲劳性能影响因素及有限元分析[J]. 航空制造技术, 2019, 62(11): 90-96.

GAO Pengfei, LIU Defeng, CAI Junjie, WANG Xiaoyang, ZHANG Yanjun, LIU Mabao. Study on Influencing Factors of Interconnected Structures Fatigue Performance of Wing Box and Its Finite Element Analysis. Aeronautical Manufacturing Technology, 2019, 62(11): 90-96.
高鹏飞，刘德峰，蔡俊杰，王晓阳，张彦军，刘马宝. 机翼盒段连接结构疲劳性能影响因素及有限元分析[J]. 航空制造技术, 2019, 62(11): 90-96. DOI： 10.16080/j.issn1671–833x.2019.11.090.

GAO Pengfei, LIU Defeng, CAI Junjie, WANG Xiaoyang, ZHANG Yanjun, LIU Mabao. Study on Influencing Factors of Interconnected Structures Fatigue Performance of Wing Box and Its Finite Element Analysis. Aeronautical Manufacturing Technology, 2019, 62(11): 90-96. DOI： 10.16080/j.issn1671–833x.2019.11.090.

摘要

针对国产某型飞机机翼翼盒典型连接区结构，设计试验件进行疲劳试验，对比分析高锁螺栓不同装配工艺对其疲劳性能的影响。结果表明：对高锁螺栓施加一次拧紧工艺后，再施加适当的二次拧紧力矩，能够有效改善连接结构的疲劳性能。其次，建立连接结构的三维有限元模型，基于正交试验法分别研究螺栓拧紧力矩、板间摩擦系数和螺栓材料弹性模量对基板孔边应力集中系数的影响。研究发现，该3种因素均对孔边应力集中系数有较大影响，其中螺栓拧紧力矩的影响最为显著，表明了适宜的二次定力工艺是提高连接结构疲劳性能的一种有效手段。

Abstract

Fatigue tests of the specimen designed according to the typical interconnected structures of a certain airplane’s wing box were carried out to analyze the effects of different assembly processes of high locked bolts on fatigue performance. The results show that the fatigue performance of interconnected structures can be improved effectively by exerting an appropriate second–tightening torque to high locked bolts after the current assembling processes. A three–dimensional finite element model was established to investigate the effects of tightening torque of bolts

friction coefficient between plates as well as elastic modules of bolts on the stress concentration factor of the hole edge in basic plates. The study indicates that all the three factors have great influence on the stress concentration factor of the hole edge. Furthermore

tightening torque of bolts has the most significant impact. It also shows that exerting a second–tightening torque is an effective mean to improve the fatigue performance of interconnected structures.

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