横向振动载荷下有无螺纹配合间隙对连接松脱性能的影响
Influence of Threaded Joint Fit Clearance on Loosening Performance under Transverse Vibration Load
李佳泽 1朱晓磊 1陆晓峰1
作者信息
摘要
分别对无间隙和有间隙的M10×1.5 螺栓连接结构建立有限元模型,采用有限元数值模拟的方法研究横向振动载荷作用下螺纹连接配合间隙对螺纹牙根部应力和预紧力的影响规律.结果表明:在螺栓连接预紧水平 0.5σs,横向振动载荷振幅 0.6 mm,频率 10 Hz工况下,有间隙的M10×1.5 的螺栓连接结构在 0.8～0.9 s,3.8～3.9 s,6.8～6.9 s3 个不同周期内螺纹牙根部应力大于无间隙螺纹牙,9.8～9.9 s周期内螺纹牙根部应力小于无间隙螺纹牙.螺栓和螺母螺纹牙根部应力之间存在相位差,预紧力更容易开始发生下降.间隙的存在重新分配螺纹牙之间应力的分布,为应力的释放提供空间.
Abstract
In this paper,the finite element models were established for M10×1.5 bolt connection with or without fit clearance,including making use of FEM simulation to investigate the law of the threaded joint fit clearance's influence on threaded tooth's root stress and preload under transverse vibration load.The results show that,the threaded tooth's root stress of the M10×1.5 bolt connection with clearance is higher than that of the threaded tooth without clearance in three different cycles of 0.8-0.9 s,3.8-3.9 s and 6.8-6.9 s when the preload level of the bolted connection stays at the 0.5σs,the transverse vibration load amplitude is 0.6 mm and the frequency is 10 Hz;the root stress of the threaded tooth in the 9.8-9.9 s cycle is less than that with-out clearance;a phase difference between the root stress of the bolt and the threaded nut tooth exists,and the preload force is more likely to start falling.The clearance existed can redistribute the stresses distribution between the threaded teeth and provides space for the release of stresses.
关键词
螺纹连接结构/横向振动/配合间隙/有限元模拟/松脱性能Key words
threaded connection structure/transverse vibration/fit clearance/FEM simulation/loose per-formance引用本文复制引用
出版年
2024
NETL
NSTL
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