有限流动水域浮体结构沉浮稳性研究

Floating structure has been widely used in new type sluices of plain flood control engineering, tidal power stations, pumping stations, large oil production platforms. During construction and operation it offen is needed to subside and buoy in finite flowing water, and the hydrodynamics of floating structure are very complicated..Now we are not understand the mechanism of floating structure's stability well, and the floating structure will overturn when it is designed improperly.Present, the researches of floating structure's stability are mainly focus on still water or the floating state influenced with wave in infinite water. It is very important and pressing to research the stability of floating structure subsiding and buoying in finite flowing water. This research is mainly based on hydrodynamic essential theory, advanced testing method of PIV and micro pressure testing system.The method combined of theoretical analysis, physical model experiment, and numerical simulation is adopted. The dynamic experimental and simulation method is applying also in this research. The primary research results including:.(1) Hydrodynamic mechanism of floating structure in finite flowing water;.(2) Hydrodynamic influence factors of floating structure in finite flowing water;.(3) Relationship of floating structure's stability with hydrodynamic influence factors..The law of floating structure's stability obtained in this research can provide theoretical basis for design and operation of new types of sluices in plain flood control engineering and revision of floating sturcture's design code.

浮体结构已被广泛应用于平原防洪工程的大跨度新型水闸、潮汐电站、泵站、大型采油平台等工程中，在施工或运行中常需要在有限流动水域中进行沉浮，其沉浮过程水动力条件复杂，稳性机理尚不清楚，处理不当容易发生倾覆。目前的研究主要针对浮体在无限水域静水或有波浪作用下漂浮状态的稳性，开展浮体在有限水域流动条件下沉浮过程的稳性研究是非常重要和迫切的。本项目研究基于水动力学基本理论、PIV 和微压测试系统等先进的测试手段，采用理论分析、物理模型试验以及数值仿真相结合的动态试验及数值模拟方法开展研究，主要包括（1）有限流动水域浮体结构稳性的水动力作用机制；（2）有限流动水域浮体水动力影响因素；（3）有限流动水域浮体结构稳性与水动力影响因素的关系。本项目研究得到的流动条件下浮体结构稳性规律，可为平原防洪工程大跨度新型水闸等的设计和施工运行以及浮式构筑物设计规范修订提供理论依据。

浮体结构已被广泛应用于平原防洪工程的大跨度新型水闸、潮汐电站、泵站、大型采油平台等工程中，在施工或运行中常需要在有限流动水域中进行沉浮，其沉浮过程水动力条件复杂，稳性机理尚不清楚，处理不当容易发生倾覆。目前的研究主要针对浮体在无限水域静水或有波浪作用下漂浮状态的稳性，开展浮体在有限水域流动条件下沉浮过程的稳性研究是非常重要和迫切的。本项目研究基于水动力学基本理论、PIV 和微压测试系统等先进的测试手段，采用理论分析、物理模型试验以及数值仿真相结合的动态试验及数值模拟方法开展研究，主要包括（1）有限流动水域浮体结构稳性的水动力作用机制；（2）有限流动水域浮体水动力影响因素；（3）有限流动水域浮体结构稳性与水动力影响因素的关系；（4）有限流动水域浮体结构倾覆力矩变化规律。本项目研究得到的流动条件下浮体结构稳性规律，可为平原防洪工程大跨度新型水闸等的设计和施工运行以及浮式构筑物设计规范修订提供理论依据。