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中文摘要：
提出地震作用下海底悬跨管道周围流场变化的计算方法，并基于海底悬跨管道水下振动台模型试验条件，建立有限元离散模型，开展试验工况的数值仿真计算，验证了海底悬跨管道地震作用下流体动力分析模型的可行性。并借鉴波流作用下海底管道水动力计算的Morison方程，开展了地震作用下水动力系数影响因素和规律的数值仿真研究。
英文摘要：
A numerical method to calculate fluid field surrounding submarine pipeline subjected to earthquake is proposed. To validate the proposed method of subsea pipeline under earthquake, finite element discretization model tests are conducted, meanwhile, numerical simulation corresponding to experimental cases is carried out. Morison equation is used for reference to calculate hydrodynamic force on subsea pipeline subject to current and wave, numerical study on factors and trends of hydrodynamic coefficients related to submarine pipeline subjected to earthquakes are achieved.
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