...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of offshore mechanics and arctic engineering >Bivariate Extreme Value Statistics of Offshore Jacket Support Stresses in Bohai Bay
【24h】

Bivariate Extreme Value Statistics of Offshore Jacket Support Stresses in Bohai Bay

机译：渤海湾近海夹克支撑应力的二元极值统计

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper presents a generic Monte Carlo-based approach for bivariate extreme response prediction for fixed offshore structures, particularly jacket type. The bivariate analysis of extremes is often poorly understood and generally not adequately considered in most practical measurements/situations; that is why it is important to utilize the recently developed bivariate average conditional exceedance rate (ACER) method. According to the current literature study, there is not yet a direct application of the bivariate ACER method to coupled offshore jacket stresses. This study aims at being first to apply bivariate ACER method to jacket critical stresses, aiming at contributing to safety and reliability studies for a wide class of fixed offshore structures. An operating jacket located in the Bohai bay was taken as an example to demonstrate the proposed methodology. Satellite measured global wave statistics was used to obtain realistic wave scatter diagram in the jacket location area. Second-order wave load effects were taken into account, while simulating jacket structural response. An accurate finite element ANSYS model was used to model jacket response dynamics, subject to nonlinear hydrodynamic wave and sea current loads. Offshore structure design values are often based on univariate statistical analysis, while actually multivariate statistics is more appropriate for modeling the whole structure. This paper studies extreme stresses that are simultaneously measured/simulated at two different jacket locations. Due to less than full correlation between stresses in different critical jacket locations, application of the multivariate (or at least bivariate) extreme value theory is of practical engineering interest.
机译：本文提出了一种基于蒙特卡洛的通用方法，用于固定海上结构特别是夹套类型的双变量极端响应预测。极端情况的双变量分析通常了解不多，在大多数实际测量/情况下通常没有充分考虑；这就是为什么利用最近开发的双变量平均条件超出率（ACER）方法很重要的原因。根据目前的文献研究，还没有将双变量ACER方法直接应用于耦合的海上夹层应力。这项研究的目标是首先将双变量ACER方法应用于夹套临界应力，旨在为各种固定式海上结构的安全性和可靠性研究做出贡献。以位于渤海湾的一个操作夹克为例，说明了所建议的方法。卫星测得的全球海浪统计数据用于获得外套位置区域中的真实波散射图。在模拟护套结构响应时，考虑了二阶波浪荷载效应。在非线性流体动力波和海流载荷作用下，使用了精确的有限元ANSYS模型来建模护套响应动力学。海上结构设计值通常基于单变量统计分析，而实际上多元统计更适合于对整个结构进行建模。本文研究了在两个不同护套位置同时测量/模拟的极限应力。由于在不同的关键护套位置上的应力之间的相关性不足，因此多元（或至少二元）极值理论的应用具有实际的工程意义。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号