In this study, by applying three-dimensional FEM, the nut screwing process is analyzed to obtain the prevailing torque T_p confirming anti-loosening. Since the nut unscrewing properties after the nut tightening is more important to prevent the nut self-loosening, the nut unscrewing is also analyzed to obtain the residual prevailing torque T_p^u newly defined in this process. Both results of T_p and T_p^u are in good agreement with the experimental results. With increasing the pitch difference, the residual prevailing torque T_p^u increases as well as the prevailing torque T_p.

中文翻译：

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螺距稍有差异的螺栓-螺母连接的剩余扭矩和剩余的主流扭矩

在这项研究中，通过应用三维有限元法，对螺母拧紧过程进行了分析，以获得确定抗松动的主要扭矩T _p。由于螺母拧紧后的螺母拧松性能对于防止螺母自松松性更为重要，因此还对螺母拧松进行了分析，以获得在此过程中新定义的剩余主要扭矩T _p ^u。的两个结果牛逼_p和牛逼_p ^ü是与实验结果相吻合。随着螺距差的增加，剩余主要转矩T _p ^u和主要转矩T _p都增加。