摘要
以往对波浪与开孔沉箱相互作用进行试验研究,通常利用传统多元线性回归方法分析试验数据,拟合回归函数关系式,缺乏保证关系式同时具有良好拟合精度和泛化性能(预测精度)的“策略”。为解决这一问题,综合考虑消浪室相对宽度、相对基床高度、波陡、相对水深、开孔率等影响因素,开展不规则波作用下的明基床上开孔沉箱物模试验,同时建立带有外部存档的差分进化算法(JADE)优化的支持向量回归机(SVR)模型(JADE-SVR),计算开孔沉箱不规则波浪反射系数、所受总水平力极值时刻对应的总垂直力折减系数。经与传统多元回归分析方法作对比,发现JADE-SVR模型计算精度更高且泛化性能良好,可以为港口工程领域的科研工作与工程所应用。
In previous physical model studies on the wave interaction with perforated caisson,traditional multivariable regression analysis was usually used to analyze the experimental data and to fit the regression formula.This analysis is lack of‘strategy’for balancing the precision and generalization quality of the regression formula.In view of this point,a laboratory test was carried out to investigate the perforated caisson by irregular waves.The various factors including the relative wave-absorbing chamber width,the relative height of the rubble bed,relative water depth,wave steepness and the perforation ratio of the caisson were considered.An adaptive differential evolution with optional external archive(JADE)algorithm based Support Vector Regression(JADE-SVR)machine was developed to calculate the wave reflection coefficient and the reduced coefficient of the vertical wave force of perforated caisson.A comparison was made between the JADE-SVR algorithm and traditional multivariate regression analysis on both precision and generalization quality.It shows that JADE-SVR algorithm makes a better result than traditional multivariate regression and thus can be used in scientific research and engineering practice.
作者
赵沛泓
孙大鹏
吴浩
ZHAO Pei-hong;SUN Da-peng;WU Hao(State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China)
出处
《水道港口》
2021年第2期166-173,共8页
Journal of Waterway and Harbor
基金
国家自然科学基金委员会—山东省人民政府联合基金资助(U1706226)。
关键词
开孔沉箱
不规则波
反射系数
垂直力
JADE
SVR
perforated caisson
irregular wave
wave reflection coefficient
vertical wave force
JADE
SVR
