近破波作用下沉箱式防波堤运动特性的模型实验研究

对近破波作用下沉箱式防波堤的运动特性进行了模型实验研究。实验中测量了沉箱模型与基床的摩擦系数、基床刚度和阻尼系数；不同水位情况下作用于沉箱模型上的近破波波压力时程；近破波作用下沉箱模型的位移和转角响应时程等，并与数学模型计算结果进行了比较分析。实验结果表明，若沉箱的滑移力大于沉箱与基床间的摩擦力，在连续波浪作用下，沉箱将连续出现间歇式滑移运动，数学模型可较好地模拟这一运动过程。

Model experiment on motion behavior of caisson breakwaters under breaking wave excitation

The model experiment on the motion behavior of caisson breakwaters is conducted under breaking wave excitation. The frictional coefficient between caisson model and foundation, the spring constant and the damping ratio of foundation, the histories of breaking wave pressures, the histories of displacements and rotations of the caisson model for various water depths are measured and compared with those calculated by the numerical method. It is shown from the results of model experiment measurement that the caisson will experience intermittent sliding motion under successive breaking wave excitation when the sliding force exceeds the frictional force between the caisson and that the foundation and that the numerical model can simulate the motion behavior of caissons.