基于SWAN模式下南海台风浪的推算

发布时间：2018-08-28 13:58

【摘要】：海洋资源的开采有着诱人的美好前景,随着海洋资源开发活动不断向深水和自然环境恶劣海域等新领域推进,面临着越来越恶劣的海洋作业环境,风浪对海洋资源的开采造成了极大危害,针对海洋油气开采工程设备在南海极端海洋环境条件下设计、施工和安全运行的需要,对南海海域的台风浪进行推算变得尤为重要,本文选用第三代海浪数值模式SWAN对南海台风浪进行模拟和推算。本文基于南海的实际地形和多场真实的台风过程,对影响SWAN模式在南海台风浪模拟中的准确性的因素进行了较为系统的研究。首先对不同的模型风场进行了对比分析,结果表明一个准确的风场是正确推算台风浪的关键。同时基于台风启德对SWAN模式中的白帽耗散作用、风能输入与白帽耗散不同的组合方式和折射项作用等因素对台风浪模拟的影响进行分析,并给出了模式中的各影响因素的合理建议。使得SWAN模式在南海台风浪模拟中具有更好的适用性。将各项的建议值用于对2013年影响南海海域的超级台风“海燕”进行台风浪的模拟。结果表明,模式能够很好地刻画台风经过南海海域时台风浪的成长变化过程。对发生于1949年一2013年65年间的热带风暴进行统计分析,筛选出南海海域达到台风等级及以上的强热带风暴共471场进行台风浪模拟。建立了精度为0.05。整个南海海域的波浪要素极值数据库,可推算任一点处波浪要素的重现期。给出了南海海域65年间的有效波高极值及对应的平均周期。利用P-III曲线方法,进行南海波浪要素重现期的推算,给出了代表区域的波浪要素特征值。
[Abstract]:The exploitation of marine resources has an attractive and beautiful prospect. As the exploitation of marine resources continues to advance to new areas such as deep water and the abominable natural environment, it is facing more and more bad marine operating environment. Wind and waves have caused great harm to the exploitation of marine resources. In view of the need of design, construction and safe operation of offshore oil and gas mining engineering equipment under the extreme marine environment conditions in the South China Sea, it is particularly important to calculate the typhoon waves in the South China Sea. In this paper, the third generation wave numerical model SWAN is used to simulate and calculate typhoon waves in the South China Sea. Based on the actual terrain of the South China Sea and the real typhoon process in many fields, the factors influencing the accuracy of SWAN model in the simulation of typhoon waves in the South China Sea are studied systematically in this paper. The results show that an accurate wind field is the key to correct calculation of typhoon wave. At the same time, based on the influence of Typhoon Kai Tak on the white cap dissipation in SWAN model, the different combination of wind energy input and white cap dissipation, and the effect of refraction term on the typhoon wave simulation, and so on, the influence of Typhoon Kai Tak on Typhoon wave simulation is analyzed. The reasonable suggestions of the influencing factors in the model are also given. The SWAN model is more suitable for typhoon wave simulation in the South China Sea. The recommended values were used to simulate the typhoon waves of Haiyan, a super typhoon that affected the South China Sea in 2013. The results show that the model can well describe the growth and variation of typhoon waves in the South China Sea. A total of 471 severe tropical storms occurring in the South China Sea during the 65 years from 1949 to 2013 were selected for typhoon wave simulation. The precision is 0.05. The maximum value database of wave elements in the whole South China Sea can calculate the recurrence period of wave elements at any point. The maximum of effective wave height and the corresponding mean period in the South China Sea during 65 years are given. The P-III curve method is used to calculate the recurrence period of the wave elements in the South China Sea, and the characteristic values of the wave elements representing the region are given.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P731.2

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