CAJ | 학술논문

波浪流对近岸浅水带床面作用强烈，该区域结构物局部床面侵蚀显著，潜存致灾威胁。用三维数值方法研究了瞬态孤立波作用下非黏性沙海床上的近岸圆柱体局部冲刷规律，分析了波浪流冲刷的3类主要影响要素，讨论了近岸地形条件影响下的波流冲刷深度。研究认为，表征浅水波流特征和柱体尺度的无量纲数Urp与KC数存在非独立关系，二者均能分别反映波流冲刷的主要规律；表示泥沙运动的力学参数Shields数在波流动床条件下仍对柱体局部冲刷有贡献；近岸地形通过床面坡度对波破碎的增强及堤岸挡墙对波浪的反射，都会影响到局部冲刷。
파랑류대근안천수대상면작용강렬，해구역결구물국부상면침식현저，잠존치재위협。용삼유수치방법연구료순태고립파작용하비점성사해상상적근안원주체국부충쇄규률，분석료파랑류충쇄적3류주요영향요소，토론료근안지형조건영향하적파류충쇄심도。연구인위，표정천수파류특정화주체척도적무량강수Urp여KC수존재비독립관계，이자균능분별반영파류충쇄적주요규률；표시니사운동적역학삼수Shields수재파류동상조건하잉대주체국부충쇄유공헌；근안지형통과상면파도대파파쇄적증강급제안당장대파랑적반사，도회영향도국부충쇄。
Solitary wave attack causes substantial erosion and significant local scour around cylindrical struc?tures in nearshore shallow water conditions. The transient wave scour around a coastal cylinder on noncohe?sive sediment seabed was investigated by three-dimensional numerical method. Three kinds of influential fac?tors on wave flow scour were identified. In addition,the maximum scour depths in different coastal topogra?phy conditions were analyzed. The results show that either modified Ursell (Urp) number or Keulegan-Car?penter (KC) number, representing the ratio of wave characteristic and cylinder scale, governs the maxi?mum scour depth. Furthermore, the dependent relationship between these two numbers was also obtained. In live-bed conditions, the Shields parameter of sediment still contributes to the local scour of the cylin?der. The offshore seabed slope and embankment wall have effects on wave breaking and wave reflection re?spectively,which therefore influence the scour depth.