摘要
本文以风暴状态下自升武平台为研究对象，借助随机NewWave理论给出了给定波面极值时平台结构随机动力响应极值概率特征分析步骤。研究了平台结构随机动力响应极值统计分布随最大波面极值的演化规律，确定出两种具有统一形式的概率分布，并对其进行有效统计描述。通过对平台结构随机动力响应极值统计分布参数与波面极值之间映射关系的模拟，建立起平台结构随机动力响应极值的概率特性数值仿真器。计算结果表明，本文所提供的方法以有限次结构分析为代价，可完成对任意给定最大波面极值时平台结构随机动力响应极值概率特性的有效模拟，从而为进一步建立高效、实用的结构动力可靠性分析模型奠定了必要的基础。
Based on NewWave theory, a statistical analysis of extreme response of Jack-up platform subjected to random wave loading with given crest elevation is performed in this paper. An investigation on the trend of statistical distribution of the extreme response is given, and two probabilistic functions are proposed to represent it. The paper puts forward a numerical method to simulate the relationship between extreme response and crest elevation, which can be used to estimate the statistical parameters of extreme response of jack-up platform related to any given crest elevation. The results of engineering example show that the presented method can improve the efficiency of structural dynamic reliability analysis greatly with decreasing the amount of stuctural analysis.
出处
《中国造船》
EI
CSCD
北大核心
2005年第B11期55-61,共7页
Shipbuilding of China
基金
高等学校博士学科点专项科研基金资助项目（20030425014）
