基于有限元技术的螺纹联接扭矩系数分析与计算方法

在螺纹联接的装配过程中，为保证连接的可靠性，必须为连接提供合适预紧力，因此需要确定预紧力一扭矩关系（扭矩系数），从而施加台适的装配扭矩。文中研究了螺纹联接传统分析方法的不足和螺纹联接几何、材料、接触等因素，提出了一种螺纹联接扭矩系数的分析与计算方法，利用有限元技术得到更加准确的结果。建立了螺纹联接3D有限元分析模型，解决了接触分析中刚体位移问题。分析得到轴向载荷分布关系和预紧力一扭矩关系曲线，计算得到的扭矩系数合理准确。

The Analysis Method Of Torque Coefficient in Threaded Connection Based on Finite Element

In order to ensure the reliability of the connection, during assembly process of the threaded connection, suitable preload must be provided, so need to determine the preload-torque relationship ＂ （torque coefficient）, thus imposing an appropriate assembly torque. This paper studies the threaded connection under traditional analysis methods and the threaded connection geometry, materials, contact and other factors, presents a threaded connection torque coefficient analysis and calculation method, results are more accurate by using finite element technology. 3D threaded connection finite element analysis model was established, the problem of rigid-body displacement of contact analysis was solved. The distribution curve of axial load and preload-torque is obtained, and the computed torque coefficient is reasonable and accurate.