摘要
为了探究T型透空式防波堤的水动力特性,本文采用匹配特征函数展开法对线性波作用下的流场进行求解,并得出波浪荷载及反、透射系数。针对结构物尖角附近流体运动的奇异性行为,分别引入特定正交多项式将区域间公共界面上的速度分布函数近似展开。通过研究水面方箱,对比实验结果与T型结构的数模结果,验证方法的正确性,并综合分析T型结构各几何参数的影响。计算结果表明:水平板尺寸对波浪荷载及反、透射系数均有显著影响;增大垂向薄板长度能有效减少波浪透射;垂向薄板从水平板中部向两侧移动时,波浪透射系数略有减小,但结构物所受波浪荷载变化较大。垂直薄板的存在,能有效提升透空式防波堤的消波性能,进而减少工程造价。
In exploring the hydrodynamic properties of T-type open-type breakwaters,the matched eigenfunction expansion method was used to determine the flow field under the action of linear waves,wave loads,and reflection and transmission coefficients.Aiming at the singularity behavior of fluid motion close to the sharp corner of structure,specific orthogonal polynomials were introduced to approximately extend the speed distribution function to the public interface between zones.Comparison of the theoretical and experimental results of a water surface square box and numerical simulation results of a T-type structure verified the accuracy of the proposed method.Comprehensive analysis was carried out to describe the effect of geometric parameters on the T-type structure.The calculation results showed that the size of the horizontal plate exerts significant effects on the wave loads and reflection and transmission coefficients and that wave transmission can be effectively reduced by increasing the vertical plate length.While the wave transmission coefficient decreased slightly when the vertical sheet was moved from the middle of the horizontal plate to both sides,the wave loads were affected significantly.The presence of a vertical thin plate can improve the wave dissipation performance of T-type open-type breakwaters and reduce construction costs.
作者
汪林
邓争志
赵西增
陈勇
WANG Lin;DENG Zhengzhi;ZHAO Xizeng;CHEN Yong(Ocean College,Zhejiang University,Zhoushan 316021,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2018年第9期1444-1450,共7页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(11702244
51679212)
浙江省杰出青年基金项目(LR16E090002)
关键词
线性波
T型防波堤
匹配特征函数展开法
正交多项式
波浪荷载
反射系数
透射系数
linear wave
T-type breakwater
matched eigenfunction expansion method
orthogonal polynomials
wave loads
reflection coefficient
transmission coefficient
