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采用试验研究和有限元分析方法,研究了混杂聚合物/金属螺栓连接的结构响应。主要研究目的是采用模数混合建筑方法为传统的船体建造技术提供比较方案。主要目标是实现防水混合连接的构思,为船体上使用的可移动板提供连接方法。改进的混合节点用于连接玻璃纤维增强复合材料板与金属底部基础。对各种几何尺寸及弯曲荷载的混合节点的性能进行了定量试验研究。试验结果显示,承受弯曲荷载时,带有金属盖板的节点比标准的螺栓节点具有更高的强度和转动刚度,同时也减小了节点的缝隙,因此提高了连接的整体防水能力。介绍了连接的局部壳单元和详细的实体单元有限元分析。简化的壳单元有限元模型被拓展到结构的整体模型中,并观察到了连接刚度与试验结果良好的相关性。采用详细的平面应变接触模型获取三维效果来预测连接的非线性响应。用本研究的结果选择连接的几何尺寸,并进行一个足尺四块板装配的静水压力试验。
The structural response of hybrid polymer / metal bolted connections was investigated using experimental studies and finite element analysis. The main research objective is to provide a comparative solution to traditional hull construction techniques using modular hybrid construction methods. The main objective is to realize the concept of a waterproof hybrid connection, providing a connection method for the movable panels used on the hull. Improved hybrid joints are used to join the glass fiber reinforced composite sheet to the metal base. Quantitative experimental study on the performance of hybrid nodes with various geometrical dimensions and bending loads. The test results show that the joint with metal cover has higher strength and rotational rigidity than the standard bolt joints when subjected to bending load and also reduces the nodal gap so as to improve the overall water-proofing ability of the joint. The connection of the local shell element and detailed solid element FEA are introduced. The simplified shell element finite element model was extended to the overall model of the structure and a good correlation between the connection stiffness and the test results was observed. A detailed plane strain contact model is used to obtain three-dimensional effects to predict the non-linear response of the connection. Using the results of this study, the geometry of the connection was chosen and a hydrostatic pressure test was performed on a full-size four-plate assembly.