...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Proceedings of the Institution of Civil Engineers >Fast random wave generation in numerical tanks
【24h】

Fast random wave generation in numerical tanks

机译：数字罐中的快速随机波产生

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

Generating and absorbing random waves in numerical models is a challenging problem, in particular when meaningful wave statistics should be generated to meet design sea-state requirements. The methodology presented herein allows for the generation of random wave fields (free surface elevation and velocities) to be reconstructed in time and in space by using window processing from a reference time series. It is demonstrated that the methodology is efficient in reproducing long non-repeating wave sequences by using only O(10~1)–O(10~2) wave components, rather than O(10~3)–O(10~4) required by a direct reconstruction from a single spectrum. This reduces the computational times required for the development of wave-train time-series elements by 40 times. Errors in instantaneous surface elevation and particle velocity between windowed and non-windowed reconstruction techniques were less than 0•4 and 0•2%, respectively, in the cases considered. The technique was combined with the relaxation zone method typically used in numerical wave tanks for generating waves. The simulations were performed using Proteus, a rapidly developing CFD−FEM toolkit for modelling fluid−structure interaction cases. The use of windowed reconstruction reduced the overall computational time associated with the simulation of waves in a numerical wave tank by ～40 and ～70% for serial and parallel execution. Results of the study show windowed reconstruction to be suitable for the representation of long-duration wave trains. Wave height and peak period are conserved within 2 and 1%, respectively.
机译：在数值模型中产生和吸收随机波是一个具有挑战性的问题，特别是当应该产生有意义的波浪统计来满足设计海州要求。本文呈现的方法允许通过使用来自参考时间序列的窗口处理来产生在时间和空间中重建的随机波场（自由表面升高和速度）。证明该方法通过仅使用O（10〜1）-O（10〜2）波分量而不是O（10〜3）-o（10〜4）来效率高效地再现长的非重复波序列从单频谱直接重建所需。这减少了40次波动时间序列元素所需的计算时间。在考虑的病例中，窗口和非窗口重建技术之间瞬时表面升高和粒子速度的误差分别小于0•4和0•2％。该技术与通常用于数值波槽中用于产生波的弛豫区方法结合。使用PROTEUS进行模拟，该模拟是一种用于建模流体结构相互作用案例的快速开发的CFD-FEM工具包。使用窗口重建的使用减少了与数值波槽中的波模拟相关的整体计算时间，以达到〜40〜70％，以进行串行和并行执行。该研究的结果显示窗口重建，适用于长持续时间波列的表示。波高和峰期分别在2和1％内保存。

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