Statistical investigation of the nonlinear dynamical behavior of offshore structures
Statistical investigation of the nonlinear dynamical behavior of offshore structures
复制标题
海上结构物非线性动力行为的统计研究
DOI：
10.1002/pamm.200810131
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Ellermann
中科院分区：
文献类型：
--
作者：
Reimers;Ellermann
越来越多的关于由于波浪结构相互作用造成的船舶、结构损坏和货物损失的报告要求开发系统来预测近海环境中的危急情况。在过去的几年里，人们进行了研究来预测与关键波浪或波浪群的遭遇，例如“流氓波浪”或所谓的“三姐妹”。此类研究的目的是开发能够预测危险事件并可能及时向船员发出警报的程序。这种极端波浪情况的危险性非常严重，但发生的情况却相当罕见。此外，更常见的是，由于流体-结构相互作用，导致在没有极端波高的波浪环境中出现关键的动力系统行为，结构受到威胁。这些事件的严重性取决于船长及其船员的规避行为的经验和决策的正确性。考虑到非线性效应，波浪中结构的统计研究显示了船舶和结构的临界行为，而无需绝对必要的恶劣海况或危险海洋现象的发生。本文描述了一个程序的开发，该程序使用基于通用面板方法的蒙特卡罗模拟技术来创建附加质量和附加阻尼，以预测结构在多种波浪条件下的行为。它展示了使用与正在开发的关键波群类似的早期预警系统来防止发生这种情况的可能方法。 （© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
The increasing amount of reports concerning damages of ships, structures and loss of cargo due to wave structure interaction demand the development of systems to predict critical situations in the offshore environment. Within the last years, research has been done to predict encounter with critical wave or wave groups such as “rogue waves” or the so–called “three sisters”. The aim of such research is to develop programs that predict dangerous incidents and possibly alert the crew in time. The dangers of such extreme wave situations are severe, but occurrence of them is rather rare. Additionally and more often, structures are endangered because of fluid–structure–interaction leading to critical dynamical system behaviour in a wave environment that shows no extreme wave heights. The severeness of these incidents then depends on the experience and correctness of decision concerning the evasive actions of the master and his crew. Taking nonlinear effects into account, the statistical investigation of structures in waves shows critical behaviour of ships and structures without the absolute necessity of heavy sea conditions or the occurrence of dangerous sea phenomena. This paper describes the development of a program that uses a Monte–Carlo–Simulation technique based on a common panel–method for the creation of added masses and added dampings to predict the behaviour of the structure in several wave conditions. It shows possible ways to prevent the occurrence using similar early warning systems to those in development for critical wavegroups. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)