The study of storm loading simulation model for fatigue strength assessment of ship structural members

船舶结构件疲劳强度评估的风暴载荷模拟模型研究

• 批准号: 17560713
• 负责人: KAWABE Hiroshi
• 金额: $ 2.18万
• 依托单位: Tokai University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560713/
• 关键词: Wave-induced load; Fatigue strength; Wave condition; Wave statistics; Ship motion; 荒天回避; 波流追算; シミュレーション; 波浪追算

Tomita et al. proposed a storm loading simulation model for a ship hull structural fatigue strength assessment. They analyzed encountered wave data collected from large number of ships and introduced the random loading model. The model is not consistency with a wave frequency table to calculate a long-term distribution of wave-induced load, such as Hobgen's wave frequency table.The purpose of this study is to introduce a new storm loading simulation model which is consistent in a wave frequency table. To simulate the time history of encountered wave condition by ship (significant wave height, mean wave period and relative angle between wave direction and ship course), we analyze a dataset of hindcast wave condition between Japan and North American shipping route over 5 years (1995-1999) and comparing measured buoy wave data and ECMWF hindcast data. To do so, the time histories of encountered wave condition are verified. Based on the encountered wave data, encountered wave conditions of ocean-going ships can be grouped into the following two classes : storm conditions and calm conditions. These two kinds of conditions appear alternatively in random order.We propose a wave simulation model which is consistent with a wave frequency table along with shipping route. This is called the storm loading model. We demonstrate a fatigue strength evaluation of VLCC structure employing a crack propagation low

Tomita等人提出了一种用于船舶船体结构疲劳强度评估的风暴载荷模拟模型。他们分析了从大量船舶收集的遭遇波数据，并引入了随机载荷模型。该模型与Hobgen的波浪频率表不一致，因此本文提出了一种新的与波浪频率表一致的风暴荷载模拟模型。为了模拟船舶遇到的波浪条件（有效波高、平均波周期和波向与航向的相对角）的时间历程，分析了日本-北美航线5年（1995-1999）的后报波浪条件数据集，并将实测浮标波浪数据与ECMWF后报数据进行了比较。为此，验证了所遇到的波浪条件的时间历程。根据船舶遭遇波资料，将船舶遭遇波状态分为风暴状态和平静状态两类。这两种情况以随机顺序交替出现，我们提出了一个与沿着航线波浪频率表相一致的波浪模拟模型。这就是所谓的风暴荷载模型。我们证明了VLCC结构的疲劳强度评估采用裂纹扩展低

项目成果

波浪荷重の最大値推定に関する考察

估算波浪载荷最大值的思考

• 发表时间: 2005
• 期刊: 日本造船学会講演論文集 第5号
• 作者: 朝永 俊;大池 孝信;宗宮 詮;河邉 寛
• 通讯作者: 河邉 寛

波浪荷重の最大値の推定における想定海象の設定とリスク解析

设定假定海况和风险分析以估算波浪载荷最大值

• 发表时间: 2005
• 期刊: 日本船舶海洋工学会講演会論文集 第1号
• 作者: Tatenobu;Sakai;河邉 寛
• 通讯作者: 河邉 寛

波浪荷重の嵐モデルの検証とその応用

波浪载荷风暴模型验证及其应用

• 发表时间: 2006
• 期刊: 日本船舶海洋工学会講演会論文集 第2号
• 作者: Shigeyuki;Nakashima;河邉 寛
• 通讯作者: 河邉 寛

Assessment of storm model for evaluation of ship structural fatigue strength

评估船舶结构疲劳强度的风暴模型评估

• 发表时间: 2006
• 期刊: Conference Proceedings of The Japan Society of Naval Architects and Ocean Engineering Vol.2K
• 作者: Shigeyuki;Nakashima;河邉 寛;Takenobu Sakai;Hiroshi Kawabe
• 通讯作者: Hiroshi Kawabe

Estimation and risk anlysis on design wave condition

设计波况估算及风险分析

• 发表时间: 2005
• 期刊: Conference Proceedings of The Japan Society of Naval Architects and Ocean Engineering Vol.1
• 作者: 坂井 建宣;田尾 隆幸;宗宮 詮;Hiroshi Kawabe
• 通讯作者: Hiroshi Kawabe