| Experimental Study on Local Scour Around A Large Circular Cylinder Under Irregular Waves |
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| 作者姓名： | 周益人 陈国平 |
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| 作者单位： | Harbor and River Department，Harbor and River Department Nanjing Hydraulic Research Institute，Nanjing 210024，China，College of Transportation and Ocean Engineering，Hohai University，Nanjing 210098，China，Nanjing Hydraulic Research Institute，Nanjing 210024，China，College of Transportation and Ocean Engineering，Hohai University，Nanjing 210098，China |
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| 基金项目： | TheprojectisfinanciallysupportedbyExcellentandProfessionalTalentsFundoftheMinistryofCommunicationsofChina |
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| 摘 要： | 1 .IntroductionWiththedevelopmentofexploitationofmarineresources ,theconstructionofoffshorestructuresdevelopsrapidly ,suchasmarineoilplatforms ,deep waterbreakwaters ,marinebridges ,largehar bors,etc .Thesestructureswillchangesurroundingwaveandcurrentconditionsandleadtolocalscourofseabed ,resultinginstructuraldamage .Therefore ,localscouraroundmarinestructuresaswellastheirprotectionhasdrawnmuchattentionfromrelativeengineeringfields .Manyscholarshaveconduct edtheoreticalanalysisandexperimentals…
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| 关 键 词： | 大循环柱面 局部冲刷 不规则波 光谱密度方程 流体力学 |
Experimental Study on Local Scour Around A Large Circular Cylinder Under Irregular Waves |
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| ZHOU Yi-ren a,b, and CHEN Guo-ping a,b a Harbor and River.Experimental Study on Local Scour Around A Large Circular Cylinder Under Irregular Waves[J].China Ocean Engineering,2004,18(2):245-256. |
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| Authors: | ZHOU Yi-ren a b and CHEN Guo-ping a b a Harbor and River |
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| Institution: | ZHOU Yi-ren a,b,1 and CHEN Guo-ping a,b a Harbor and River Department,Nanjing Hydraulic Research Institute,Nanjing 210024,China b College of Transportation and Ocean Engineering,Hohai University,Nanjing 210098,China |
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| Abstract: | A series of physical model tests are conducted for local scour around a circular cylinder of a relatively large diameter (0 15< D/L <0.5) under the action of irregular waves. The laws of change of the topography around the cylinder are systematically studied. The effects of wave height, wave period, water depth, sediment grain size and cylinder diameter are taken into account. The mechanism of formation of the topography around the cylinder is analyzed. A detailed analysis is given to bed sediment grain size, and it is considered that the depth of scour around the cylinder under wave action is not inversely proportional to the sediment grain diameter. On such a basis, an equation is proposed for calculation of the maximum depth of scour around a cylinder as well as its position under the action of irregular waves. |
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| Keywords: | large circular cylinder local scour irregular waves |
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