波浪中锚泊浮堤系统特性的理论研究

Technical Research on the Performance of Multi-mooring Floating Breakwater System in Waves

本文研究了在规则波作用下锚泊浮堤的运动响应、消波性能、横漂力引起的堤体横漂量以及此时链的受力情况。在理论计算过程中应用了Frank源汇分布法和Grim切片理论,并采用九尾的远场积分法计算二阶漂移力,采用Kim法计算无穷远处的反射波波幅,用传统的悬链线理论对锚泊系统作静力计算,还将矩形剖面防波堤的计算结果与日本井上义行的计算结果以及我国南京水利科学研究院有关矩形剖面防波堤的系列模型试验結果做了比较,计算结果和试验结果接近,吻合。本研究的目的在于用理论方法预测浮式防波堤的特性并优化防波堤的形状。

This paper deals with the procedure of predicting the performance of multi-mooring floating breakwater in regular waves, which includes the motions of breakwater, transmission coefficient, steady displacement of breakwater and mooring line tension caused by steady drifting force. Frank's closed-fit method, Grim's strip method, Maruo's formula of far field method for two-dimentional drifting force, Kim's method for the amplitudes of reflected waves of infinityand the classical catenary theory for mooring lines are used. Numerical results were compard with Yoshiyuki Inoue's calculation on rectangular vessels and model tests on the rectangular breakwater undertaken by Nanjing Water Conservancy Science Institute and found they are in good agreement, The aim of this research is to monitor the performance of floating breakwater and to optimize the configuration of floating breakwaters by using the theoretical model.