浙江省近岸台风浪特征分析

发布时间：2018-10-20 12:40

【摘要】：近年来，台风浪的研究始终倍受关注，近岸区的波浪状况更是与人们的生活息息相关。利用SW谱波浪模型，建立了浙江省海域的台风浪计算模型。对模型风场和浪场的源项参数进行试验和取值，讨论白帽耗散、底摩阻和波浪破碎等源项参数对模型的影响程度。本文利用实测资料分别对浙江省海域的台风风场和台风浪模型进行验证。将登陆浙江省的台风分成三类，并利用验证后的浙江省台风浪模型对三类台风进行数值模拟。本文重点研究浙江省近岸台风浪的传播和演化过程。通过分析台风浪的传播和演变特点，得出以下结论：（1）本文建立的浙江省海域的台风浪模型，在研究浙江省附近海域的台风浪特征具有较好的适用性。（2）在SW模型计算中，，白帽耗散项对有效波高的影响效果明显，底摩阻系数对有效波高值仍有较大影响，波浪破碎作用对模拟结果影响很小。波浪由深水向浅水传播时，会在海岸附近发生波浪破碎，因此需要开启波浪破碎项。（3）经过台风眼中心区域的点其有效波高经历了4个阶段，分别为升高、降低、再升高和再降低；而不经过台风眼中心区域的点其有效波高的变化规律为先升高后降低。（4）在北半球台风前进方向右侧的波浪发展迅速，右侧的有效波高值远大于左侧的有效波高值，形成危险半圈。台风右半圈有效波高相对左半圈增幅的最大值出现在移动路径右侧的十级风圈内。（5）台风移动路径上有效波高的最大值出现在台风中心的前眼壁处，而台风风眼中心以外区域有效波高的最大值出现在距离台风中心最近的时刻。（6）登陆浙江省的台风引起的台风浪在舟山岛E向产生的有效波高最大，而有效波高的最小值在舟山岛的N向产生。
[Abstract]:In recent years, the study of typhoon waves has been paid more and more attention, and the wave situation in coastal areas is closely related to people's lives. Based on the SW spectral wave model, the typhoon wave model in Zhejiang Province is established. The source parameters of wind field and wave field are tested and measured, and the influence of source parameters such as white cap dissipation, bottom friction and wave breakage on the model is discussed. In this paper, the typhoon wind field and typhoon wave model in Zhejiang Province are verified by the measured data. The typhoon landing in Zhejiang Province is divided into three types, and the three kinds of typhoons are numerically simulated by using the verified typhoon wave model in Zhejiang Province. This paper focuses on the propagation and evolution of typhoon waves near the coast of Zhejiang Province. By analyzing the characteristics of typhoon wave propagation and evolution, the following conclusions are drawn: (1) the typhoon wave model in Zhejiang Province is established in this paper. In the study of typhoon wave characteristics near Zhejiang Province, it has good applicability. (2) in the calculation of SW model, the effect of white cap dissipation term on effective wave height is obvious, and the bottom friction coefficient still has great influence on effective wave height. Wave breakage has little effect on the simulation results. Wave breaking occurs near the coast when the wave propagates from deep water to shallow water, so it is necessary to open the wave breaking term. (3) the effective wave height of the point passing through the center of the typhoon eye has gone through four stages, which are rising and decreasing, respectively. (4) the wave on the right side of the typhoon's forward direction in the Northern Hemisphere develops rapidly, and the change of the effective wave height does not pass through the central region of the typhoon eye. The effective wave height on the right side is much larger than the effective wave height on the left side, forming a dangerous half circle. The maximum increase of the effective wave height in the right half circle of the typhoon relative to the left half circle appears in the 10-magnitude wind circle on the right side of the moving path. (5) the maximum effective wave height on the moving path of the typhoon appears at the front eye wall of the typhoon center. The maximum effective wave height outside the typhoon eye center appears at the closest moment to the typhoon center. (6) the typhoon wave caused by the typhoon landing in Zhejiang Province is the largest effective wave height in the E-direction of Zhoushan Island. The minimum effective wave height is generated in the N direction of Zhoushan Island.
【学位授予单位】：大连海洋大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P731.22

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