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将抛石防波堤认为离散介质结构,首次运用二维刚性体离散单元法对抛石防波堤在波浪作用下的失稳过程和机理进行了研究。该计算模型和方法可以模拟抛石防波堤块体在波浪作用下的局部失稳和从局部失稳到整体失稳的变化过程。计算结果显示周期和波高越大,波浪的作用力也越大,对防波堤的破坏作用依次增大,防波堤的局部失稳主要表现为两侧堤肩块体的失稳,整体失稳是局部失稳累积的结果,抛石防波堤的破坏现象和波浪理论得到验证。
Considering the structure of discrete medium as the breakwater, the instability process and mechanism of riprap breakwater under wave action are firstly studied by using two-dimensional rigid body discrete element method. The calculation model and method can simulate the local instability and the change from local instability to overall instability under the wave action of the riprap block. The results show that the larger the period and the wave height, the greater the force of the wave, and the greater the damage to the breakwaters. The local buckling of the breakwater is mainly manifested as the instability of the block body on both sides, and the overall instability is the local instability The cumulative results, the destruction of the breakwater and the theory of waves, are validated.