止口及螺栓对法兰盘结构静力学特性的影响

以含止口配合的螺栓连接法兰盘结构为研究对象，利用ANSYS有限元软件进行数值仿真分析，基于接触算法与实体单元建模方法分析结构受横向载荷时的静力学特性，对比了含止口结构和无止口结构在接触状态和弯曲刚度上的差异.在此基础上，讨论了不同参数对接触特性和弯曲刚度的影响规律，为后续含止口螺栓连接法兰盘结构的设计提供一定参考.研究结果表明:对接触特性的影响，止口长度的增加有利于降低受压区域面积和接触压力的最大值；对弯曲刚度的影响，螺栓个数对弯曲刚度的影响占主导地位，其次是止口长度和摩擦系数，然后是螺栓预紧力，而止口过盈量对弯曲刚度的影响最小，同时良好的接触状态有利于提高结构弯曲刚度.

Influence of Rabbets and Bolts on Static Characteristics of Flange Structures

The bolted flange structure with rabbet fit is taken as the research object， and the numerical simulation analysis is carried out by using ANSYS finite element software. Based on the contact algorithm and solid element modeling method， the static characteristics of the structure under lateral load are analyzed， and the differences of contact state and bending stiffness between the structure with rabbets and the structure without rabbets are compared. On this basis， the influence of different parameters on the contact characteristics and bending stiffness is discussed， which provides a reference for the subsequent design of flange structures with the rabbet-bolt connection. The results show that the increase of rabbet length is helpful to reduce the area of compression area and the maximum value of contact pressure， and the number of bolts is the most important factor affecting the bending stiffness， followed by the rabbet length and friction coefficient， and then the bolt preload， while the interference of rabbets has the least effect on the bending stiffness. At the same time， good contact state is conductive to improving the bending stiffness of the structure.