1.内燃机与动力系统全国重点实验室,潍坊 261205
2.潍柴动力股份有限公司,潍坊 261001
3.北京理工大学 机械与车辆学院,北京 100081
赵振龙,男,1990年生,山东东营人,高级工程师;主要研究方向为发动机紧固可靠性研究及产品设计;E-mail:zhaozl@weichai.com。
覃文洁,女,1968年生,四川南充人,博士,副教授;主要研究方向为机械系统动力学、结构强度;E-mail:qinwj@bit.edu.cn。
收稿:2024-05-25,
纸质出版:2026-02-15
移动端阅览
赵振龙,祁同晖,孙宇,等. 横向循环载荷作用下螺柱滑移松动的试验测试及数值分析[J]. 机械强度,2026,48(2):120-125.
ZHAO Zhenlong,QI Tonghui,SUN Yu,et al. Test and numerical analysis of slip loosening of stud under transverse cyclic loading[J]. Journal of Mechanical Strength,2026,48(2):120-125.
赵振龙,祁同晖,孙宇,等. 横向循环载荷作用下螺柱滑移松动的试验测试及数值分析[J]. 机械强度,2026,48(2):120-125. DOI: 10.16579/j.issn.1001.9669.2026.02.014.
ZHAO Zhenlong,QI Tonghui,SUN Yu,et al. Test and numerical analysis of slip loosening of stud under transverse cyclic loading[J]. Journal of Mechanical Strength,2026,48(2):120-125. DOI: 10.16579/j.issn.1001.9669.2026.02.014.
目的
2
在横向循环载荷作用下,螺纹连接结构的接触面间会产生微动滑移,引起旋转松动,损害系统的性能,甚至引发重大安全事故。以承受横向循环载荷的紧螺纹螺柱连接结构为研究对象,运用试验测试和有限元仿真的方法对其接触界面的滑移行为进行考察,可为螺纹连接结构的可靠性设计提供支撑。
方法
2
采用基于摩擦纳米发电机原理的自驱动传感器测量螺母的旋转滑移位移,实现了对螺柱松动的监测。对在横向循环载荷作用下螺柱连接结构的接触滑移情况进行有限元仿真,考察了几个不同幅值循环载荷下螺纹连接结构中螺母支承面和螺纹接触面的滑移行为。
结果
2
结果表明,螺母支承面发生了完全滑移;而与下连接件接触的螺纹面则仅发生了局部滑移;部分螺纹圈1个载荷循环内的所有接触面在不同时刻都发生了过滑移,即蠕动滑移。随着循环载荷次数的增加,发生蠕动滑移的螺纹圈数增加。在预紧力相同的情况下,横向循环载荷的幅值越大,所有螺纹面越早进入蠕动滑移状态,螺柱也松动得越快。
Objective
2
Micro slip will occur at contact interfaces in threaded connection structures under transverse cyclic loading
causing looseness, damaging the performance of the system
and even leading to serious safety accidents. Taking the tightly threaded stud connection structure under transverse cyclic loading as the research object
the slip behavior of its contact interface was investigated by means of testing and finite element simulation
which can provide support for the reliability design of threaded connection structures.
Methods
2
A self-driven sensor based on the principles of triboelectric nanogenerators was used to measure the rotational slip displacement of the nut and monitor the loosening of the stud. The finite element simulation was conducted to simulate the contact slips in the stud connection structure under transverse cyclic loads
and the slip behaviors of the nut bearing surface and the thread contact surfaces in the threaded connection structure under several different amplitude cyclic loads were investigated.
Results
2
The results indicate that the nut bearing surface experienced complete slip
while the thread surface in contact with the lower connecting part only experienced local slip. All contact surfaces of the partial thread turns exhibited overslip at different moments within one load cycle
i.e.
creep slip. As the number of load cycles increased
the number of thread turns that experienced creep slip would increase. Under the same preloading force
the larger the amplitude of transverse cyclic load
the earlier the whole threaded surface became creep slipping
and the faster the stud loosened.
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