本文研究了海洋平台结构系统疲劳可靠性评沽方法。文中对平台结构简兰管节点疲劳可靠性分析模型进行了简单的评述，在该模型的基础上，建立了用S-曲线模型与断裂力学模型分别计算平台完好管节点及有初始裂纹管节点疲劳寿命的平台结构系统疲劳可靠性分析模型。作为一人算例，文中运用作者开发的程序系统，对一固定式导管架平台进行了疲劳可靠性计算。

本文介绍了适用于固定式导管架海上平台结构系统静强度可靠性分析程序系统的功能特点、原理及结构最后, 以一固定式导管架平台作为算例验证了程序的可靠性。

本文介绍了作者开发的适用于固定式导管架海上平台结构系统疲劳与疲劳可靠性分析程序系统的设计原理、结构及功能特点。最后, 以一固定式导管架平台作为算例验证了程序系统的可靠性与实用性。

A system reliability estimation method for spatial jacket platforms is developed in this paper. The jacket platform is modeled into three-dimensional assembly of spatial beam and plate elements in Finite Element Method (FEM). The limit failure states correspond to collapse of a series of structural members which are identified by engineering design criteria. In this paper the following aspects are taken into account: the punching shear and buckling failures in member failure modes for the tubular joints and tubular columns respectively; incremental loading approach for establishment of the safety margin equations of system failure; the algorithm of enumerating significant failure modes for the structural systems and other concepts, such as the false failure mode and the virtual limit state. The final work is devoted to the reliability analysis for a practical jacket platform presently put into operation on the Bohai Sea. The computed results shows that method suggested in this paper is feasible and effective for the evaluation of the system reliability of offshore platforms.

研究了结构系统疲劳可靠性分析方法建立了结构系统疲劳可靠性分析模型，提出了求取结构系统疲劳主要失效模式的方法最后，以一海上平台为工程实际算例验证了文中算法的可行性及有效性。