【摘要】：海洋資源的開采有著誘人的美好前景,隨著海洋資源開發(fā)活動不斷向深水和自然環(huán)境惡劣海域等新領域推進,面臨著越來越惡劣的海洋作業(yè)環(huán)境,風浪對海洋資源的開采造成了極大危害,針對海洋油氣開采工程設備在南海極端海洋環(huán)境條件下設計、施工和安全運行的需要,對南海海域的臺風浪進行推算變得尤為重要,本文選用第三代海浪數(shù)值模式SWAN對南海臺風浪進行模擬和推算。 本文基于南海的實際地形和多場真實的臺風過程,對影響SWAN模式在南海臺風浪模擬中的準確性的因素進行了較為系統(tǒng)的研究。首先對不同的模型風場進行了對比分析,結果表明一個準確的風場是正確推算臺風浪的關鍵。同時基于臺風啟德對SWAN模式中的白帽耗散作用、風能輸入與白帽耗散不同的組合方式和折射項作用等因素對臺風浪模擬的影響進行分析,并給出了模式中的各影響因素的合理建議。使得SWAN模式在南海臺風浪模擬中具有更好的適用性。將各項的建議值用于對2013年影響南海海域的超級臺風“海燕”進行臺風浪的模擬。結果表明,模式能夠很好地刻畫臺風經(jīng)過南海海域時臺風浪的成長變化過程。 對發(fā)生于1949年一2013年65年間的熱帶風暴進行統(tǒng)計分析,篩選出南海海域達到臺風等級及以上的強熱帶風暴共471場進行臺風浪模擬。建立了精度為0.05。整個南海海域的波浪要素極值數(shù)據(jù)庫,可推算任一點處波浪要素的重現(xiàn)期。給出了南海海域65年間的有效波高極值及對應的平均周期。利用P-III曲線方法,進行南海波浪要素重現(xiàn)期的推算,給出了代表區(qū)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.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：P731.2

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