ENERGY EXCHANGE BETWEEN FLUID AND FLAPPING/BENDING STRUCTURES

具有长而灵活的叶或茎的沉水植物通常在许多水生环境中发现，包括河流、湖泊和沿海海域。这些植物对其环境的生态健康和水质做出了许多重大贡献，包括充当避难所、食物来源、捕获和储存颗粒、减少床沙侵蚀和浑浊。用工程术语将水生植物定义为复合材料、各向异性、粘弹性、高度非均质结构。水生植物生活在流动的水域中，承受着复杂的载荷，通常表现为拉伸、压缩、弯曲、扭转和剪切的混合。复杂的、依赖于尺度的流体-植物相互作用仍然没有被很好地理解。特别是，在与阻力产生和阻力控制机制相关的现有知识中存在许多空白。

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.