近年来，海洋平台在碰撞、火灾、爆炸等偶然灾害下的风险评估越来越引起学者们的关注。目前大部分的海洋平台风险分析方法是基于独立风险因素分析的，对风险事件耦合的影响考虑不足，导致风险评估中的概率计算不准确。本项目拟从多风险耦合的角度研究偶然灾害下海洋平台多风险耦合演化及致灾机理。主要研究内容有：（1）基于系统工程理论，结合复杂网络理论和多米诺效应原理，建立海洋平台的多风险耦合演化模型；（2）将风险元及动态逻辑门引入演化模型，进而分析计算风险的空间和时间相关性；（3）通过边线阀值确定突出相关的耦合风险，采用水动力学、结构力学结合数值仿真建立多风险耦合作用下海洋平台响应模型及可靠性增长模型。旨在为海洋平台的风险评估及风险管理提供理论依据和参考。

Recently, risk assessment of offshore platform under the accidental disasters of collision, fire, blast and others has attracted more and more concern from scholars. However, most of the evaluation methods are based on analyzing independent risk factors, and lose sight of influence from risks coupling, which bring an inaccurate calculation in risk assessment. The project study on the evolvement and destructive mechanism of coupled multiple risks of offshore platform under accidental disaster from the angle of risks coupling. The main contents including: Firstly, build the evolvement model of coupled multiple risks by combining the system engineering theory, complex network theory and the domino effect principle; Secondly, the risk-element and dynamic logic gate will be introduced into the evolvement model to analyze and calculate the correlation in space and time. Thirdly, determine the relevant coupling risks through the threshold, use hydrodynamics, structural mechanics, and combine the numerical simulation to build the response model and steady growth model of offshore platform. The study aims to provide theoretical foundation and references for risk assessment and risk management of offshore platform.