砂质海床波浪传播衰减试验研究

Experimental study on wave propagation attenuation over sandy seabeds

近岸海床对波浪传播的影响是客观存在的。为研究砂质海床上波浪传播的衰减情况,综合考虑砂质海床孔隙率、海床相对厚度、波陡和相对传播距离等影响因素,开展砂质海床上波浪传播衰减物理模型试验。通过分析各影响因素与波高衰减率之间的关系,应用单一变量与多元非线性回归拟合方法,分别得到砂质海床上规则波浪与不规则波浪的波高沿程衰减率的计算关系式。验证结果表明,该计算关系式具有较好的精确性与适用性。

The influence of nearshore seabed on wave propagation is objectively present.To investigate the attenuation of wave propagation on sandy seabeds,a physical model experiment was conducted,comprehensively considering influencing factors such as porosity of sandy seabeds,relative seabed thickness,wave steepness,and relative propagation distance.By analyzing the relationships between these influencing factors and the wave height attenuation rate,a methodology involving single-variable and multivariate nonlinear regression fitting was applied,resulting in the derivation of calculation formulas for wave height attenuation rates along distances for both regular and irregular waves on sandy seabeds.Verification results indicate that these calculation formulas exhibit favorable accuracy and applicability.