波流共同作用下海底子母管线水动力的物理模型试验研究

成小飞; 王永学; 王国玉

波流共同作用下海底子母管线水动力的物理模型试验研究

大连理工大学海岸和近海工程国家重点实验室, 辽宁大连 116024

基金项目: 国家自然科学创新研究群体基金(50921001)。

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出版历程
- 收稿日期: 2011-10-25
- 修回日期: 2012-02-12

Physical model experimental study of hydrodynamic forces on submarine piggyback pipeline under wave-current coexisting action

State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China

摘要

摘要: 通过物理模型试验研究海底子母管线分别在规则波加流和不规则波加流作用下的水动力特性。基于Morison方程,采用"等效直径法"分析得到子母管线拖曳力系数C_D,惯性力系数C_M和升力系数C_L(C_D⁺,C_L^-)。试验分别考察了流速比U_c/U_w,母管与海床间隙比e/D及子母管间的相对缝隙G/D对海底子母管线水动力系数的影响。结果表明水动力系数随U_c/U_w的增大而减小;当e/D<0.5时,海床对子母管线受力的影响比较明显,C_D,C_M及C_L⁺均随e/D增大而减小,|C_L^-|随e/D增大而增大;对子母管间的相互影响也不可忽略,C_D,C_M和|C_L^-|均随G/D增大而减小,C_L⁺值随G/D增大而增大。
- 波流 /
- 海底子母管线 /
- 力系数
Abstract: Physical model experiments are conducted to study the hydrodynamic characteristic of submarine piggyback pipeline under regular wave-current and irregular wave-current actions.Based on Morison equation, drag coefficient C_D, inertia coefficient C_M and lift coefficient C_L(C_L⁺,C_L^-) are obtained with the method of "equivalent diameter". In the experiments, effects of current ratio U_c/U_w, gap ratio between the large pipeline and the seabed e/D and spacing ratio between the large pipeline and the small pipeline G/D on the hydrodynamic coefficients of submarine piggyback pipeline are investigated. The results indicate that the hydrodynamic coefficients decrease with the increase of U_c/U_w.The effect of the seabed on the hydrodynamic forces on the piggyback pipeline is pronounced for e/D<0.5.C_D,C_M and C_L⁺ decrease with the increase of e/D,and |C_L^-| increases with the increase of e/D. In addition, the interaction between the large pipeline and the small pipeline is not negligible.C_D,C_M and |C_L^-| decrease with the increase of G/D,and C_L⁺ increases with the increase of G/D.
- wave-current /
- submarine piggyback pipeline /
- force coefficients

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参考文献(14)

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