...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ocean Engineering >Time domain predictions of inertial loads on a drifting ship in irregular beam waves
【24h】

Time domain predictions of inertial loads on a drifting ship in irregular beam waves

机译：不规则波束中一艘漂流船的惯性载荷的时域预测

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A proper estimation of the ship accelerations, particularly in the transversal direction, is fundamental for predicting the risk of cargo shifts and inherent structural damages in severe irregular seas. A specific situation worth to be considered in this context is the so-called dead ship condition, in which the ship, because of a loss of steering capabilities, is drifting in beam waves at zero speed. Particularly in this situation, a proper modelling of ship dynamics in wave is deemed necessary for a reliable assessment of inertial loads.In this paper three time domain procedures with different accuracy are applied and compared. The aim is to investigate the dependency of inertial loads on the non-linear effects of ship geometry and on the couplings among the 6DOF of the ship.Simulations are carried out with, in input, the same irregular sea realizations in the time domain, obtained from a digitalisation of JONSWAP spectra. A technique allowing for a fine matching of the digitalised spectra to the analytical ones is developed and applied.The investigation indicates that couplings among ship motions trigger larger inertial loads and, accordingly, a larger probability of occurrence for cargo shifting and structural damages.
机译：正确估计船舶加速度，尤其是横向方向的加速度，对于预测严重不规则海域中货物移动和固有结构损坏的风险至关重要。在这种情况下，值得考虑的一种特殊情况是所谓的死船状态，在这种情况下，由于转向能力的丧失，船舶正以零速在束波中漂移。特别是在这种情况下，为了可靠地评估惯性载荷，必须对波浪中的船舶动力学进行正确的建模。本文采用了三种时域精度不同的程序，并进行了比较。目的是研究惯性载荷对船舶几何形状的非线性影响以及船舶六自由度之间的耦合的依赖性。在输入中，在时域中使用相同的不规则海域实现进行模拟，获得来自JONSWAP光谱的数字化。研究和应用了一种使数字化光谱与分析光谱精确匹配的技术。研究表明，船舶运动之间的耦合会触发较大的惯性载荷，因此，发生货物移动和结构损坏的可能性更大。

著录项

  • 来源
    《Ocean Engineering》 |2019年第15期|135-147|共13页
  • 作者

    Acanfora Maria; Rizzuto Enrico;

  • 作者单位

    Univ Naples Federico II, Dept Ind Engn DII, Naples, Italy;

    Univ Naples Federico II, Dept Ind Engn DII, Naples, Italy;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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