【摘要】 连接结构为多模块浮体中最薄弱的环节，受力形式较为复杂，所以其极限承载能力直接影响到浮体结构的使用寿命和安全性能。本文初步设计了一种含锥度的插销式连接结构，基于罚函数法和准静态法，考虑轴销接触效应影响，对该结构进行非线性强度计算，分析其失效模式和极限强度，并研究摩擦因子和材料属性对该结构极限承载能力的影响规律，最终形成了一套考虑接触效应的复杂连接结构非线性极限承载能力及其统计特征分析方法。结果表明：插销式连接结构的失效模式为销轴受弯后与有锥度轴承挤压导致的变形失效；摩擦因子对结构极限强度的影响呈对数正态分布，且摩擦因子越大，极限强度越小；屈服强度是影响结构极限承载力的最主要因素。研究结果可为浮体用插销式连接结构的设计和安全可靠性分析提供相关参考。更多还原

【Abstract】 The connecting structure is the weakest link in a multi module floating body, and its stress form is quite complex, so the ultimate bearing capacity of the connecting structure directly affects the service life and safety performance of the floating body structure. In this paper, a pin connection structure with taper was preliminarily designed. Based on the penalty function method and quasi-static method, with consideration of the influence of shaft pin contact effect, the nonlinear strength of the structure was calculated, its failure mode and ultimate strength were analyzed, and the influence laws of friction factor and material properties on the ultimate bearing capacity of the structure were studied. Finally, a nonlinear ultimate bearing capacity and statistical characteristics analysis method of complex connected structures considering contact effect was formed. The results show that the failure mode of the pin connection structure is of deformation caused by the extrusion of the pin shaft and the tapered bearing after bending. The influence of friction factor on the ultimate strength of the structure shows a lognormal distribution, and the greater the friction factor, the smaller the ultimate strength. Yield strength is the most important factor affecting the ultimate bearing capacity of structures. The research results can serve as a reference for both the design and the safety and reliability analysis of pin connection structures for floating bodies.更多还原