上海交通大学学报

上海交通大学学报 ›› 2019, Vol. 53 ›› Issue (12): 1404-1410.doi: 10.16183/j.cnki.jsjtu.2019.12.002

• 学报（中文） • 上一篇    下一篇

随机波浪作用下自升式平台的极值响应估计

许超超，倪萍，顾颖，何军   

  1. 上海交通大学 船舶海洋与建筑工程学院， 上海 200240
  • 发布日期:2020-01-06
  • 通讯作者: 何军，男，副教授，博士生导师，电话(Tel.):021-34207985； E-mail: junhe@sjtu.edu.cn.
  • 作者简介:许超超 (1993-)，男，浙江省宁波市人，硕士生，研究方向为结构可靠度计算.
  • 基金资助:
    工信部高技术船舶科研项目深水半潜式支持平台研发——平台振动与噪声控制技术研究项目；上海市自然科学基金项目(16ZR1417300)

Extreme Response Estimate of Jack-Up Platforms Under the Action of Random Wave Loads

XU Chaochao，NI Ping，GU Ying，HE Jun   

  1. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • Published:2020-01-06

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摘要： 提出一种用于估计随机波浪载荷作用下自升式海洋平台极值响应的参数化方法.该方法采用移位广义对数正态分布模型近似计算平台随机响应的极值分布，由紧邻分布尾部的两个支撑点及其超越概率估计模型参数，从而减少估计极值响应分布尾部所需的响应样本容量.将所提出方法用于某实际平台的极值响应分析的结果表明，该方法具有数值精度高和计算费用小的优点，适用于随机波浪载荷作用下自升式平台的可靠性及风险评估.

关键词: 自升式平台； 极值响应； 移位广义对数正态分布； 尾部分布

Abstract: For estimating the extreme response of the jack-up platform, a parametric method under the action of random wave loads is developed. The method approximates the extreme distribution of the stochastic response of the platform by using the shifted generalized lognormal distribution model. The model parameters are estimated by two supporting points and their exceeding probability in the adjacent tail distribution such that the size of the needed samples is reduced significantly. The extreme response analysis of a real platform shows that the proposed method has enough high numerical accuracy and needs relatively few computational costs, which is suitable for the reliability and risk assessment of the jack up platform under the action of random wave loads.

Key words: jack-up platform; extreme response; shifted generalized lognormal distribution; tail distribution

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