Scientific Development Research

This paper presents a systematic analysis of the loosening mechanisms and anti-loosening measures for aluminum alloy bolted joints under vibratory loads. By investigating the dynamic behavior characteristics of the joint under vibration, the evolution process and influencing factors of loosening are revealed. The applicability of traditional anti-loosening methods in aluminum alloy connections is evaluated, highlighting their limitations in friction maintenance, mechanical locking, and assembly adaptability. A novel composite anti-loosening solution integrating multiple mechanisms is proposed, along with the corresponding implementation approach. Comparative experiments are conducted to evaluate the performance of various anti-loosening methods under different vibration conditions. Results show that the new strategy offers superior advantages in maintaining preload and resisting slip, providing theoretical support and engineering guidance for enhancing the stability of bolted connections.

Aluminum alloy bolt; Vibratory load; Loosening mechanism; Anti-loosening measure; Connection stability