关键词: 浮体结构;吃水深度;浮体长度;水力特性;回流区;

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.

Key words: floating structure; draft depth; floating structure length; hydraulic characteristics; recirculation zone;