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首页> 外文期刊>Journal of Physical Oceanography >Are Rogue Waves Really Unexpected?
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Are Rogue Waves Really Unexpected?

机译：流氓浪潮真的出乎意料吗？

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摘要

An unexpected wave is defined by Gemmrich and Garrett as a wave that is much taller than a set of neighboring waves. Their definition of "unexpected'' refers to a wave that is not anticipated by a casual observer. Clearly, unexpected waves defined in this way are predictable in a statistical sense. They can occur relatively often with a small or moderate crest height, but large unexpected waves that are rogue are rare. Here, this concept is elaborated and statistically described based on a third-order nonlinear model. In particular, the conditional return period of an unexpected wave whose crest exceeds a given threshold is developed. This definition leads to greater return periods or on average less frequent occurrences of unexpected waves than those implied by the conventional return periods not conditioned on a reference threshold. Ultimately, it appears that a rogue wave that is also unexpected would have a lower occurrence frequency than that of a usual rogue wave. As specific applications, the Andrea and Wave Crest Sensor Intercomparison Study (WACSIS) rogue wave events are examined in detail. Both waves appeared without warning and their crests were nearly 2 times larger than the surrounding O(10) wave crests and thus unexpected. The two crest heights are nearly the same as the threshold h(0.3)x10(6) similar to 1.6H(s) exceeded on average once every 0.3 x 10(6) waves, where H-s is the significant wave height. In contrast, the Andrea and WACSIS events, as both rogue and unexpected, would occur slightly less often and on average once every 3 x 10(6) and 0.6 x 10(6) waves, respectively.
机译：Gemmrich和Garrett将意外波定义为比一组相邻波高得多的波。他们对“意外”的定义是指偶然的观察者无法预料到的波浪，显然，以这种方式定义的意外的波浪在统计意义上是可以预测的，它们可能在波峰高度较小或中等的情况下相对经常发生，但波幅较大。流氓的意外波很少见，这里基于三阶非线性模型对此概念进行了详细阐述和统计描述，特别是开发了波峰超过给定阈值的意外波的条件返回周期。与没有以参考阈值为条件的常规返回周期所隐含的返回周期相比，返回周期更长或更平均地出现不期望波的频率更低，最终看来，同样出乎意料的流氓波的发生​​频率也比通常情况下更低作为特定的应用，将对安德里亚波峰传感器比对研究（WACSIS）进行详细研究。两种波浪都毫无预警地出现，其波峰比周围的O（10）波峰大近2倍，因此出乎意料。两个波峰高度几乎与阈值h（0.3）x10（6）相同，类似于平均每0.3 x 10（6）波超过一次1.6H（s），其中H-s是有效波高。相反，由于无赖和意外事件，Andrea和WACSIS事件的发生频率会略有降低，并且平均每3 x 10（6）和0.6 x 10（6）波发生一次。

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  • 来源
    《Journal of Physical Oceanography》 |2016年第5期|1495-1508|共14页
  • 作者

    Fedele Francesco;

  • 作者单位

    Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA|Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA;

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