Variation Law of Preload of Bolted Joint in Tightening Process

被引：2

作者：

Luo Z. ^{[1
,2
,3
]}

Shi B.-L. ^{[1
,2
]}

Zhang X.-X. ^{[1
,2
]}

Wu F.-Y. ^{[4
]}

机构：

[1] School of Mechanical Engineering & Automation, Northeastern University, Shenyang

[2] Key Laboratory of Vibration, Control of Aero-Propulsion System, Ministry of Education, Northeastern University, Shenyang

[3] Foshan Graduate Innovation School of Northeastern University, Foshan

[4] AECC Shenyang Engine Research Institute, Shenyang

来源：

Dongbei Daxue Xuebao/Journal of Northeastern University | 2023年 / 44卷 / 02期

关键词：

bolted joint; experimental research; preload decline; residual preload; tightening process;

D O I：

10.12068/j.issn.1005-3026.2023.02.009

中图分类号：

学科分类号：

摘要：

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. © 2023 Northeastern University. All rights reserved.

引用

页码：215 / 222

页数：7

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