【摘要】 浮体结构作为一种环境友好型装置已广泛应用于平原防洪水利工程，但在浮体沉浮过程中，周围水流变化会影响浮体结构的安全运行。采用物理模型试验，对浮体结构长度以及吃水深度不同时浮体周围的水力特性及回流区进行了测量分析。结果表明：由于浮体的阻挡，靠近浮体背水面位置的水流流速减小；吃水深度增大导致过水断面减小，最大流速增大且位置下移，回流区范围增加；浮体结构长度变化对流速分布影响较小，但随着长度增加，回流区长度减小；浮体长度的增加以及吃水深度的减小会提高浮体结构的稳定性。更多还原

【Abstract】 As an environmentally friendly device, floating structures have been widely used in plain flood control water conservancy projects.However, during the sinking and floating process of a floating structure, the change of surrounding water flow will affect the safety operation of the floating structure.In this paper, the physical model test was carried out to measure and analyze the hydraulic characteristics and recirculation zone around the floating structure when the floating structure length and draft depth were different.The results showed that the flow velocity near the back surface of the floating structure decreased due to the blocking of the floating body.The increase of draft depth led to the decrease of cross section, so the maximum velocity increased and the position moved down, and the range of the recirculation zone increased.The change of the floating structure length had little effect on the flow velocity distribution, but the recirculation zone length decreased with the increasing of the floating structure length.The increase of the floating structure length and the decrease of the draft depth would improve the stability of the floating structure.更多还原