波浪冲击作用下核电站防浪堤动力响应的数值模拟

Numerical simulation of the dynamic response of breakwater under wave impact

基于多物质ALE(Arbitrary Lagrangian-Eulerian)方法,利用带阻尼罚函数实现波浪与防浪堤结构间耦合作用,模拟波浪冲击作用下防浪堤结构及流体三维动态响应过程,所得结果与物理模型试验结果一致性较好。讨论挡浪墙表面波压力分布及挡浪墙所承受最大水平推力及结构动态响应对波浪冲击系数影响。结果表明,前挡浪墙静水面位置与后挡浪墙底部波压力较大;后墙承受波浪水平推力较大;结构动态响应会增强波浪的冲击作用。仿真结果可作为防浪堤强度设计重要依据及控制越浪量设计参考。

To understand and improve the anti-wave-impact performance of coastal breakwater, the dynamic behaviors of breakwater under wave impact were numerically simulated. The wave movement was modeled by using the multi-material arbitrary lagrangian-eulerian （ALE） method. The interaction between breakwater structure and fluid was studied by applying the penalty method. The model and approaches were validated by comparing numerical results with experimental data. Based on the above investigation, a numerical simulation was performed to explore the wave pressure distribution of seawall surface and the maximum horizontal thrust. The effect of structure response of breakwater on wave pressure was also dealt with. The results show that： the wave pressures are in good agreement with the experimental results, the wave impact is enhanced by structural dynamic response, and the rear wall withstands the larger horizontal wave thrust. The results can provide references to the anti-wave-impact design and overtopping design of coastal nuclear power plant breakwaters.