ENERGY EXCHANGE BETWEEN FLUID AND FLAPPING/BENDING STRUCTURES

具有长而柔韧的叶或茎的沉水植物常见于许多水生环境中，包括河流、湖泊和沿海海洋沃茨。这些植物对环境的生态健康和水质做出了许多重要贡献，包括作为庇护栖息地、食物来源、捕获和储存颗粒物、减少河床沉积物侵蚀和浊度。利用工程术语，水生植物可以被定义为复合的、各向异性的、粘弹性的、高度非均匀的结构。水生植物生活在流动的沃茨中，承受着复杂的载荷，这些载荷通常由拉伸、压缩、弯曲、扭转和剪切的混合物来表现。复杂和规模依赖的流体-植物相互作用仍然没有得到很好的理解。特别是，目前的知识有许多差距，有关阻力产生和阻力控制机制。

Submerged plants with long, flexible leaves or stems are commonly found in many aquatic environments, including rivers, lakes and coastal marine waters. These plants make many significant contributions to the ecological health and water quality of their environments, including acting as sanctuary habitats, sources of food, capturing and storing particulates, reducing bed sediment erosion and turbidity. Using the engineering terminology, the aquatic plants can be defined as composite, anisotropic, viscoelastic, highly heterogeneous structures. Living in flowing waters, aquatic plants experience complex loads which are often presented by a mixture of tension, compression, bending, torsion and shear. The complex and scale dependent fluid-plant interactions are still not well understood. In particular, there are many gaps in the current knowledge related to drag-generating and drag control mechanisms.