Measuring Seabed Pressure: a Search for Longuet-Higgins Events
Measuring Seabed Pressure: a Search for Longuet-Higgins Events
复制标题
测量海底压力：寻找朗格-希金斯事件
作者：
K. Richter;Peishuh Wang;J. Ayers
Longuet-Higgins发展了一种非线性理论，预测相互作用的表面波可以产生比流行的线性理论预测的大得多的底部压力场。这种强烈的海底压力变化可以为水下海洋传感器提供可提取的能量。本研究旨在确定（1）是否可以检测到来自Longuet-Higgins非线性相互作用的底部压力，（2）反射悬崖海岸线与低洼海滩的检测是否存在差异，以及（3）如果检测到，表面波方向和高度是否可以预测这种压力场。我们发现，在所有的调查地点，由于表面波的底部压力变化很好地预测线性理论，而不是Longuet-Higgins非线性理论。
Longuet-Higgins developed a non-linear theory predicting that interacting surface waves could produce bottom pressure fields that were much greater than predicted by prevailing linear theory. Such strong bottom pressure variations could provide extractable energy to power underwater oceanographic sensors. This study was designed to determine (1) whether bottom pressures derived from Longuet-Higgins nonlinear interactions could be detected off San Diego, (2) whether there was a difference in detection off a reflective cliff shoreline versus a low-lying beach, and (3) whether surface wave direction and height could predict such pressure fields, if detected. We found that in all locations surveyed, bottom pressure variations due to surface waves were well predicted by linear theory, rather than Longuet-Higgins non-linear theory.