| 摘要: |
| 采用考虑螺纹细节的有限元模型对螺栓预紧过程进行仿真分析。研究了摩擦系数、支撑结构材料对螺栓扭矩系数、受力变形和螺纹扣的受力分配的影响。提出了根据螺栓变形计算螺栓相对刚度系数的方法。与传统的理论和经验结果对比表明，基于该精确模型的仿真能准确反映螺栓预紧过程，提高螺栓预紧力设计和强度校核准确度，为实现复杂连接结构螺栓预紧力精确设计和验证提供了有效解决途径。 |
| 关键词: 螺栓预紧 扭矩系数 有限元仿真 |
| DOI： |
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| 基金项目:国家自然科学基金（11602031） |
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| Study of Bolt Pre-tightening Process Based on Simulation With Thread Details |
| XU Weixiu,WANG Shufan,YANG Fan,HUANG Wei |
| (Beijing Institute of Astronautical Systems Engineering) |
| Abstract: |
| In this paper, the finite element model with thread details is used to simulate the bolt pre-tightening process. The influence of friction coefficients and supporting structure materials on the torque coefficient, forced deformation of bolt and the forces distribution of threads are studied. And the method of calculating relative stiffness coefficient of bolt according to the bolt deformation is provided. Compared with traditional theory and experiment， the results show that the simulation based on the accurate model can reflect the pre-tightening process, and improve the accuracy of the bolt preload design and strength checking. It provides an effective solution for accurate design and verification of bolt pre-tightening of complex connection structures. |
| Key words: Bolt pre-tightening Torque coefficient Finite element simulation |