港域波浪联合绕射、反射特性试验研究

摘要

Aiming at the complex characteristics of harbor waves in the combination of diffraction and reflection,based on the overall physical model test of the port,the distribution law of the wave height disturbance coefficient in the harbor area under the action of the irregular wave was studied.The results show that the disturbance coefficients of the multi-directional irregular waves are positively correlated with the peak period in the coverage area where the wave diffraction or wave reflection are dominant,and the larger the difference of the period,the larger the difference of the disturbance coefficient.Under the combined effect of wave-induced wave diffraction,the disturbance coefficient of unidirectional irregular wave has no obvious relationship with the change of spectrum peak period,and wave reflection is very sensitive to wave direction.In the physical model test of the reflection of the existing building,it is necessary to simulate the model boundary reflection accurately,otherwise it may result in test failure.Numerical model is the same,the relevant buildings need to be selected the appropriate reflection coefficient.The results of the study have important reference significance for the following port project construction.%针对港域波浪在绕射、反射联合作用下波况复杂的特点,基于港口波浪整体物理模型试验,对不规则波作用下港域内波高扰动系数的分布规律进行研究.研究表明:在波浪绕射作用或波浪反射作用占主导地位的掩护区域,多向不规则波的扰动系数与谱峰周期正相关,且周期相差越大,扰动系数相差越大.在波浪反射占主导地位的波浪绕射联合作用下,单向不规则波的扰动系数随谱峰周期的变化无明显规律性关系,且波浪反射对波向十分敏感.在存在原有建筑物反射的物理模型试验中,需要将模型边界反射模拟准确,否则可能造成试验失败;数学模型亦然,对相关建筑物需选取合适的反射系数.研究结果对后续的港口工程建设有重要的借鉴意义.