中文摘要：

植物的消波特性能有效防止波浪冲刷所造成的岸线侵蚀。在开展根茎叶共同作用下的刚性植物消波实验的基础上,采用Kobayashi和Dalrymple经验公式计算本实验植物模型的拖曳力系数,探究了拖曳力系数变化规律。通过对比分析两种经验公式计算所得的拖曳力系数,发现采用Kobayashi消波模型对于本实验中刚性植物消波模拟效果更好。根茎叶均在不同程度上对于植物消波特性产生影响。拖曳力系数与邱卡数、雷诺数、厄塞尔数及相对水深之间的关系依赖于植物淹没度。针对包含根茎叶的刚性植物,考虑植物摆动因素,对波能耗散方程中阻力项进行修正,提出改进的消波模型。

英文摘要：

The coastal erosion problems caused by wave scouring can be solved by vegetation efficiently due to their function of wave damping. The experiments of wave attenuation by rigid vegetation were conducted in the flume,in which the effects of roots,stems and canopies were considered. The drag coefficientwas computed by the formula of Kobayashi and Dalrymple and its variation was investigated. It can befound that the wave damping simulated by the Kobayashi model is better than that of Dalrymple by compar-ing the drag coefficients between the two formulas. Root,stem and canopy affect on wave dissipation at varying degrees. The relationship between the drag coefficient and Keulegan-Carpenter number,Reynolds number,Ursell number and relative water depth depends on submergence ratio. Finally,to obtain the model ofrigid vegetation composed of root,stem and canopy,the term of drag force derived from the dissipation of energy equation has been modified involving swaying motion of plants.