拧紧工艺的螺栓连接结构预紧力变化规律

doi:10.12068/j.issn.1005-3026.2023.02.009

东北大学学报（自然科学版） ›› 2023, Vol. 44 ›› Issue (2): 215-222.DOI: 10.12068/j.issn.1005-3026.2023.02.009

拧紧工艺的螺栓连接结构预紧力变化规律

罗忠^{1, 2, 3}，石宝龙^{1, 2}，张小霞^{1, 2}，吴法勇⁴

(1. 东北大学机械工程与自动化学院，辽宁沈阳 110819； 2. 东北大学航空动力装备振动及控制教育部重点实验室，辽宁沈阳110819； 3. 东北大学佛山研究生创新学院，广东佛山528312； 4. 中国航发沈阳发动机研究所，辽宁沈阳110015)

修回日期:2021-12-14 接受日期:2021-12-14 发布日期:2023-02-27
通讯作者: 罗忠
作者简介:罗忠(1978-)，男，内蒙古集宁人，东北大学教授，博士生导师.
基金资助:
广东省基础与应用基础研究基金联合基金资助项目(2020B1515120015)；国家自然科学基金资助项目(11872148，U1908217).

Variation Law of Preload of Bolted Joint in Tightening Process

LUO Zhong^1,2,3， SHI Bao-long^1,2， ZHANG Xiao-xia^1,2， WU Fa-yong⁴

1. School of Mechanical Engineering ＆ Automation， Northeastern University， Shenyang 110819， China; 2. Key Laboratory of Vibration and Control of Aero-Propulsion System， Ministry of Education， Northeastern University， Shenyang 110819， China; 3. Foshan Graduate Innovation School of Northeastern University， Foshan 528312， China; 4. AECC Shenyang Engine Research Institute， Shenyang 110015， China.

Revised:2021-12-14 Accepted:2021-12-14 Published:2023-02-27
Contact: LUO Zhong
About author:-
Supported by:
-

摘要/Abstract

摘要： 针对航空发动机装配过程中螺栓预紧力一致性差的问题，建立螺栓连接转子有限元模型，获得螺栓在顺序拧紧和星形拧紧时预紧力的衰减规律和分布特点.进行螺栓预紧力实验研究，分析了拧紧顺序及拧紧速度对螺栓预紧力的影响，并揭示了预紧力随时间的衰减机理.结果表明:拧紧相邻螺栓会使预紧力大幅衰减；提高拧紧速度会使螺栓获得较大预紧力，使得连接结构更加稳定；螺栓拧紧后预紧力会在短时间内大幅衰减，衰减规律与扭矩幅值息息相关.因此，在发动机装配中，严格控制螺栓拧紧工艺的同时，预紧力短时间内的衰减不可忽视.

关键词: 螺栓连接；拧紧工艺；预紧力衰减；残余预紧力；实验研究

Abstract: Aiming at such problems as poor consistency of bolt preload in aero-engine assembly， the decline rule and distribution characteristics of bolt preload in sequential tightening and star tightening were studied based on the FEM of bolted rotors. The experimental study of bolt preload was carried out， the influence of tightening sequence and tightening speed on the bolt preload were analyzed， and then the decline mechanism of the preload over time was revealed. The results showed that the preload decreases significantly when the adjacent bolts are tightened，and increasing tightening speed will make the bolt get larger preload， which makes the connection structure more stable. After tightening the bolts， the preload will decline significantly in a short period of time， and the decline rule is closely related to the torque amplitude. Therefore， in engine assembly， the decline of preload in a short period of time cannot be ignored while strictly controlling the bolt tightening process.

Key words: bolted joint; tightening process; preload decline; residual preload; experimental research

中图分类号:

TP20

罗忠，石宝龙，张小霞，吴法勇. 拧紧工艺的螺栓连接结构预紧力变化规律[J]. 东北大学学报（自然科学版）, 2023, 44(2): 215-222.

LUO Zhong， SHI Bao-long， ZHANG Xiao-xia， WU Fa-yong. Variation Law of Preload of Bolted Joint in Tightening Process[J]. Journal of Northeastern University(Natural Science), 2023, 44(2): 215-222.

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拧紧工艺的螺栓连接结构预紧力变化规律

Variation Law of Preload of Bolted Joint in Tightening Process

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