摘要
部分开口沉箱因其能有效降低波浪力和反射系数被广泛的应用到港口工程领域,基于修正后的光滑粒子流体动力学(SPH)算法建立了二维数值波浪水槽与开口沉箱数值模型,并与现有的线性规则波理论进行对比,验证了SPH数值方法的正确性,同时还对开孔沉箱消浪室内部流体流入流出的复杂运动过程性、总水平力比与其相关因素的关系进行了深入分析,并将数值结果与物理模型实验进行对比,结果表明,数值结果与实验拟合的线性关系相一致;当消浪室相对宽度B/L为0.11时,开孔沉箱总水平力减小趋势很明显。最后,采用了最小二乘法拟合出开孔沉箱总水平力与其相关因素的非线性回归关系。本研究将为类似工况下开口式沉箱的设计和优化提供一个新的参考依据。
The perforated caisson can effectively decrease the wave force and reflection coefficient,thus it is widely used in port engineering.In this paper,the modified Smoothed Particle Hydrodynamics （SPH） algorithm was used to develop a two-dimensional numerical model of wave and perforated caisson.Compared with the results determined by the existing linear regular wave theory,the numerical results obtained from the SPH method were proved to be correct.Meanwhile,the complex characteristics of internal fluid motion in and out of the wave dissipation chamber,and the relationship between the total horizontal force and its affecting factors were investigated.The numerical results were compared with the experimental results,which indicated that the numerical calculation of the ratio of total horizontal force is in good agreement with the empirical regression equation obtained from the experimental data,and the total horizontal force of the perforated caisson tends to decrease when the relative width of wave dissipation chamber is about 0.11.Finally,the least squares method was used to derive a nonlinear regression equation to represent the relationship between the total horizontal force and its affecting factors.The research can provide a new reference for the design and optimization of perforated caisson under the similar working conditions.
出处
《南水北调与水利科技》
CAS
CSCD
北大核心
2014年第6期78-83,88,共7页
South-to-North Water Transfers and Water Science & Technology
基金
国家自然科学基金项目“波浪作用下斜坡堤护面块体失移和破坏过程的精细模拟”(51179030)
关键词
波浪力
SPH
开孔沉箱
水动力
线性关系
规则波
光滑函数
wave force
SPH
partially perforated caisson
hydrodynamics
linear relationship
regular wave
smooth function
