Dynamic Stability Analysis of Caisson Breakwater in Lifetime Considering the Annual Frequency of Severe Storm
Dynamic Stability Analysis of Caisson Breakwater in Lifetime Considering the Annual Frequency of Severe Storm作者机构:State Key Laboratory for Simulation & Safety of Hydraulic EngineeringCollaborative Innovation Center for Advanced Ship and Deep-Sea ExplorationTianjin University
出 版 物:《China Ocean Engineering》 (中国海洋工程(英文版))
年 卷 期:2015年第29卷第2期
页 面:287-300页
核心收录:
学科分类:081505[工学-港口、海岸及近海工程] 0908[农学-水产] 08[工学] 0710[理学-生物学] 0830[工学-环境科学与工程(可授工学、理学、农学学位)] 0707[理学-海洋科学] 0807[工学-动力工程及工程热物理] 0815[工学-水利工程] 0824[工学-船舶与海洋工程] 0802[工学-机械工程] 0814[工学-土木工程] 082401[工学-船舶与海洋结构物设计制造] 0801[工学-力学(可授工学、理学学位)]
基 金:financially supported by the National Natural Science Foundation of China(Grant No.51279128) the Innovative Research Group Science Foundation(Grant No.51321065) the Construction Science and Technology Project of Ministry of Transport of the People’s Republic of China(Grant No.2013328224070)
主 题:caisson breakwater dynamic stability lifetime wave spectrum annual storm frequency
摘 要:In the dynamic stability analysis of a caisson breakwater, most of current studies pay attention to the motion characteristics of caisson breakwaters under a single periodical breaking wave excitation. And in the lifetime stability analysis of caisson breakwater, it is assumed that the caisson breakwater suffers storm wave excitation once annually in the design lifetime. However, the number of annual severe storm occurrence is a random variable. In this paper, a series of random waves are generated by the Wen Sheng-chang wave spectrum, and the histories of successive and long-term random wave forces are built up by using the improved Goda wave force model. It is assumed that the number of annual severe storm occurrence is in the Poisson distribution over the 50-year design lifetime, and the history of random wave excitation is generated for each storm by the wave spectrum. The response histories of the caisson breakwater to the random waves over 50-year design lifetime are calculated and taken as a set of samples. On the basis of the Monte Carlo simulation technique, a large number of samples can be obtained, and the probability assessment of the safety of the breakwater during the complete design lifetime is obtained by statistical analysis of a large number of samples. Finally, the procedure of probability assessment of the breakwater safety is illustrated by an example.