偏差对螺栓连接拧紧力矩-预紧力关系的影响
Influence of Deviation on Tightening Torque-preload Relation of Bolted Joints
刘宁 1安鲁陵 1许文豪 1赵聪 1屈征涛1
作者信息
- 1. 南京航空航天大学 机电学院,南京 210016
- 折叠
摘要
螺栓连接在飞机结构装配中应用广泛,目前主要通过控制拧紧力矩间接控制预紧力,以保证连接可靠性.但实际情况中由于被连接结构和工装制造偏差以及定位误差,难免出现孔倾斜、被连接件端面不平行等偏差,可能会影响拧紧力矩与预紧力的转化关系,进而影响最终获得的预紧力.采用实验与有限元仿真结合的方法开展研究,探究拧紧过程中上述偏差对拧紧力矩与预紧力转化关系以及对预紧力的影响,对于提升工程实际中预紧力的精准性具有重要意义.研究发现对于拧紧力矩-预紧力转化关系,孔倾斜偏差的影响存在一个阈值,超过该值时影响显著,使得最终获得的预紧力下降超过30％,端面不平行偏差的影响存在类似的情况.
Abstract
Bolted joints are widely used in aircraft structural assembly.At present,preload is controlled indirectly by controlling the tightening torque to ensure connection reliability.However,due to manufacturing deviations and positioning errors in the connecting structure and tooling,it is inevitable that the hole inclination and the end face of the connected part are not parallel,which may affect the conversion relation between the tightening torque and the preload force,which in turn affects the final preload force.By combining experiments and finite element simulation,the transformation relation between the tightening torque and the preload as well as the influence of the above deviation on the preload in the tightening process is explored,which is crucial to improving the accuracy of the preload in engineering practice.Significant influence of the hole tilt deviation on the tightening torque-preload conversion relation is found beyond a certain threshold.The influence of the end face non-parallel deviation is similar.
关键词
螺栓连接/拧紧过程/偏差/拧紧力矩-预紧力/有限元仿真Key words
bolted joints/tightening process/deviation/tightening torque-preload/finite element simulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据