海底悬跨管道地震作用下水动力模型的数值分析
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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。
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.
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.
引文
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[2]杨烁,吴宝山.二维圆柱扰流数值模拟[J].中国造船,2007,48(增刊):533-539.
[3]李玉成,Marchal J L J.波浪作用下海底管线的物理模型实验研究[J].海洋通报,1996,15(5):68-73.
[4]Yamamoto T,Nath J H,Slotta L S.Wave Forces on Cylinders Near Plane Boundary[J].Journal.Waterways Harborsard Coastal Engineering Division,1974,100(4):345-359.
[5]Gryta O,Torum A.On wave and current forces on pipelines on sea bed[C].Proceedings of the 8th International Off-shore Mechanics and Arctic Engineering Symposium,1989,5:143-148.
[6]Sumer B M,Fredse J.Pressure measurements around a pipeline exposed to combined waves and current[C].Proceed-ings of the 11th International Offshore Mechanics and Arctic Engineering,1992:113-121.
[7]李昕,刘亚坤,周晶等.海底悬跨管道动力响应的试验研究和数值模拟[J].工程力学,2003,20(2):21-25.
[8]王志培,何颖强.水下圆柱体地震分析[J].水动力学研究与进展:A辑,1989,4(1):122-129.
[9]王勖成.有限单元法[M].北京:清华大学出版社,2003.
[10]李明高,李昕,周晶.地震对海底悬跨管道动水力作用的实验研究[J].水动力学研究与进展:A辑,2009,24(6):747-753.
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