漂浮式潮流电站载体结构疲劳分析  

Structure Fatigue Analysis of Floating Tidal Power Station Carrier

作　　者：徐国明 孙苏龙 刘峰[3] 

机构地区：[1]中交一航局第二工程有限公司,山东青岛266071 [2]沪东中华造船(集团)有限公司,上海200129 [3]哈尔滨工程大学,黑龙江哈尔滨150001

出　　处：《船舶标准化工程师》2015年第4期71-74,共4页Ship Standardization Engineer

摘　　要：漂浮式潮流电站载体在波浪交变载荷的长期作用下容易产生疲劳破坏,进而带来整体结构的安全隐患,因此在设计初期需进行节点疲劳分析,预测结构工作寿命,并对易疲劳部位结构采取措施以延长使用周期。本文基于谱分析法,应用短期疲劳累积损伤理论和S-N曲线,通过计算两个节点在不同工况与波浪频率组合下的热点应力范围,结合功率谱密度函数,分析了某200k W漂浮式潮流电站在特定海域下的疲劳特性,结果表明疲劳寿命满足使用年限要求。The floating tidal power station carrier is subject to fatigue failure due to the long-term effect of alternating wave load, and is furthermore subject to the risks of structural safety. Therefore it is essential, at the early stage of design, to do the node fatigue analysis, to predict the working life of the structure and to take measures on the structure of the easy-fatigue parts for longer working period. Based on the spectral analysis method, applying the short-term fatigue cumulative damage theory and the S-N curve, the paper analyzes the fatigue performance for a 200 k W floating tidal power station carrier under particular sea condition, by calculating the hot spot stress range of two nodes under the combination of different conditions and wave frequencies, as well as combining the power spectral density function. The results show that the fatigue life meets the requirement of the service life.

关 键 词：潮流电站载体 谱分析法 累计损伤 疲劳分析 

分 类 号：U661.4[交通运输工程—船舶及航道工程] U674.37[交通运输工程—船舶与海洋工程]