台风期间浪流相互作用对海浪影响的数值模拟
发布时间：2019-06-25 13:26
【摘要】：台风期间，围绕台风中心逆时针方向的强风在海面引起海浪和风生流，海浪和风生流之间的浪流相互作用对台风浪的成长和传播有一定影响，也刻画着台风期间海浪的分布情况。我国靠近西北太平洋，受台风影响较为集中，每年都因台风和台风引发的海洋灾害造成巨大损失。研究台风期间浪流相互作用对应对台风引发的海洋灾害有一定意义。 将ADCIRC水动力模式和SWAN海浪模式进行耦合，开发了适合台湾附近海域的海浪——流场耦合模式。使用耦合模式对2011年第11号强台风“南玛都”期间的海浪和风生流进行模拟，结合实测海浪和流的数据，验证了模式的合理性。同时发现，模型风场不能体现台湾岛地形对台风的作用，使得台湾海峡内部的海浪模拟偏高。 根据影响台湾岛台风路径统计资料，选取了三个代表主要台风路径的典型台风：“南玛都”、“凤凰”和“韦帕”，进行模拟。通过比较耦合模式和非耦合模式的海浪波高模拟结果，得到浪流相互作用对海浪波高影响的空间分布。结果表明：在开阔水域，台风中心的右前方区域，浪流相互作用使海浪波高减小；而在台风中心以及台风中心的左后方区域，浪流相互作用使海浪波高增大。靠近台湾岛时，浪流相互作用对海浪影响的显著影响区域向整个台湾岛东岸延伸。在台湾海峡内部，显著影响区域的分布被狭长地形所改变。 分析了以上分布特征的形成机制：风生流对同向海浪成长的阻碍作用，和风生流涌浪传播速度的增加作用共同导致了台风中心附近“右前-左后”的分布；台湾岛阻碍了海浪的传播路径，放大了“右前-左后”分布的形成机制，从而引起显著影响区域的向台湾岛东岸的延伸。 本研究加深了对台风期间海浪分布特征和浪流相互作用影响的认识，证明了使用浪流耦合模式对台风期间海浪进行模拟的必要性，对台风期间海浪预报和精确模拟有一定参考价值。
[Abstract]:During the typhoon, the strong wind around the center of the typhoon causes waves and wind-induced currents on the sea surface. The wave-current interaction between the waves and the wind-generated currents has a certain impact on the growth and propagation of Taiwan wind waves, and also describes the distribution of waves during the typhoon. China is close to the northwest Pacific Ocean and is mainly affected by typhoons. Every year, it causes great losses due to typhoons and marine disasters caused by typhoons. It is of great significance to study the correspondence of wave and current interaction during typhoons for marine disasters caused by typhoons. The ADCIRC hydrodynamic model is coupled with the SWAN wave model, and a wave-flow field coupling model suitable for the waters near Taiwan is developed. The coupling model is used to simulate the waves and wind-induced current during the 11th strong typhoon "Nanmadu" in 2011. Combined with the measured wave and current data, the rationality of the model is verified. At the same time, it is found that the model wind field can not reflect the effect of Taiwan island topography on typhoon, which makes the wave simulation in Taiwan Strait on the high side. Based on the statistical data of typhoon paths affecting Taiwan Island, three typical typhoons, "Nanmadu", "Phoenix" and "Weipa", which represent the main typhoon paths, are selected for simulation. By comparing the simulation results of wave height between coupling mode and uncoupled mode, the spatial distribution of the influence of wave current interaction on wave height is obtained. The results show that in the open water area, in the right front of the typhoon center, the wave height decreases, while in the typhoon center and the left rear area of the typhoon center, the wave height increases. Near Taiwan Island, the significant influence area of wave current interaction on waves extends to the east coast of Taiwan Island. In the Taiwan Strait, the distribution of the significantly affected area is changed by the narrow topography. The formation mechanism of the above distribution characteristics is analyzed: the hindering effect of wind-generated current on the growth of waves in the same direction, and the increase of the propagation velocity of wind-generated current jointly leads to the distribution of "right front-left back" near the center of typhoon. Taiwan Island hinders the propagation path of waves and magnifies the formation mechanism of "right front-left back" distribution, thus causing the extension of the affected area to the east coast of Taiwan Island. This study deepens the understanding of the distribution characteristics of waves and the influence of wave-current interaction during typhoons, and proves the necessity of using wave-current coupling model to simulate the waves during typhoons, which has certain reference value for wave prediction and accurate simulation during typhoons.
【学位授予单位】：中国科学院研究生院（海洋研究所）
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P731.2
本文编号：2505717
[Abstract]:During the typhoon, the strong wind around the center of the typhoon causes waves and wind-induced currents on the sea surface. The wave-current interaction between the waves and the wind-generated currents has a certain impact on the growth and propagation of Taiwan wind waves, and also describes the distribution of waves during the typhoon. China is close to the northwest Pacific Ocean and is mainly affected by typhoons. Every year, it causes great losses due to typhoons and marine disasters caused by typhoons. It is of great significance to study the correspondence of wave and current interaction during typhoons for marine disasters caused by typhoons. The ADCIRC hydrodynamic model is coupled with the SWAN wave model, and a wave-flow field coupling model suitable for the waters near Taiwan is developed. The coupling model is used to simulate the waves and wind-induced current during the 11th strong typhoon "Nanmadu" in 2011. Combined with the measured wave and current data, the rationality of the model is verified. At the same time, it is found that the model wind field can not reflect the effect of Taiwan island topography on typhoon, which makes the wave simulation in Taiwan Strait on the high side. Based on the statistical data of typhoon paths affecting Taiwan Island, three typical typhoons, "Nanmadu", "Phoenix" and "Weipa", which represent the main typhoon paths, are selected for simulation. By comparing the simulation results of wave height between coupling mode and uncoupled mode, the spatial distribution of the influence of wave current interaction on wave height is obtained. The results show that in the open water area, in the right front of the typhoon center, the wave height decreases, while in the typhoon center and the left rear area of the typhoon center, the wave height increases. Near Taiwan Island, the significant influence area of wave current interaction on waves extends to the east coast of Taiwan Island. In the Taiwan Strait, the distribution of the significantly affected area is changed by the narrow topography. The formation mechanism of the above distribution characteristics is analyzed: the hindering effect of wind-generated current on the growth of waves in the same direction, and the increase of the propagation velocity of wind-generated current jointly leads to the distribution of "right front-left back" near the center of typhoon. Taiwan Island hinders the propagation path of waves and magnifies the formation mechanism of "right front-left back" distribution, thus causing the extension of the affected area to the east coast of Taiwan Island. This study deepens the understanding of the distribution characteristics of waves and the influence of wave-current interaction during typhoons, and proves the necessity of using wave-current coupling model to simulate the waves during typhoons, which has certain reference value for wave prediction and accurate simulation during typhoons.
【学位授予单位】：中国科学院研究生院（海洋研究所）
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P731.2
【参考文献】
相关期刊论文 前1条
1 许富祥;中国近海及其邻近海域灾害性海浪的时空分布[J];海洋学报(中文版);1996年02期
，本文编号：2505717
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