振动环境下嵌件锁紧螺母防松性能研究

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中图分类号：TH131.3 文献标志码：A文章编号：1006-0316（2025）09-0015-07

doi ： 10.3969/j.issn.1006-0316.2025.09.003

Anti-Loosening Performance of Insert Lock Nuts under Vibration Environment

WANG Wenchao1²，NI Qihan³，GAO Jingjing12， SUN Jianfei³，YANG Yao12，WANG He4 （1.Henan Provincial Key Laboratory of Fastening Technology， Xinyang 464000， China; 2. Henan

Aerospace Precision Manufacturing Co.，Ltd.， Xinyang 4640o0， China; 3.Key Laboratory of Advanced

Technologies ofMaterials，Ministry of Education， Chengdu 610031， China; 4.School of Mechanics and Aerospace Engineering， Southwest JiaotongUniversity， Chengdu 61oo31， China）

Abstract ： This paper is to study the failure behavior of insert nuts under diferent vibration loads （lateral and axial）. In order to evaluate the anti-loosening performance of insert locknuts and common nuts under transverse alternating load， weconduct a comprehensive analysis of the behaviour ofaxial force atenuation ofbolts and the response curves of connecting structures to reveal the loosening failure mechanism ofinsert nuts. We investigate the role of insert locknuts on improving the service life of the coupling structure by changing different axial alternating load amplitudes.Then，combining macro and micro analysis methods，damage analysis is conducted on the damage area. The results show that under transverse alternating loads，the axial force of the insert locknuts decreases slowly，indicating good loosening resistance.Under axial alternating load，insert nuts can relieve the stress concentration phenomenon of the whole bolt， improve the stressdistribution of the whole nut， and reduce the damage caused by micromotion wearon the threads of non-inserted parts.The wear mechanisms include fatigue wear， oxidative wear，adhesive wear and abrasive wear.

Key words ∵ self-locking nut;damage morphology; friction factor; anti-loosening performance

螺栓连接结构是现代机械工程和结构设计中最基本、最重要的连接形式之一。（剩余5401字）