人工块体替代垫层块石的数值试验研究

摘要

针对大垫层块石选料困难和抛填理坡施工难度大、较难控制施工质量及进度的问题,通过水工物理模型试验及数值模拟的手段,对人工块体替代垫层块石可行性进行了初步探究.基于水工试验结论,利用CAD与CFD相结合的方式,建立了符合真实海况的三维防波堤水动力数学模型,并通过波面方程和物理模型试验对其有效性进行了验证.数值试验给出了不同垫层形式对波浪爬高的影响,探讨了护面块体的受力和块体间隙的流场分布.结果表明人工块体作垫层有一定可行性.为进一步探究护面层失稳的动力特征提供了依据,对工程设计中人工块体代替垫层块石的可行性提供参考.%It is difficult to control the quality and progress of construction because of the difficulty of material selection and difficult construction of filling slope.Through the physical model test and numerical simulation, we preliminary study the feasibility of using artificial block instead of stone layer.Based on the result of the model test,a three-dimensional breakwater model which is closer to the actual sea conditions is built via CAD and CFD.And it is validated effectively by wave theory and model test.It gives the effects of different cushion types on wave run-up.The fluid force of armor blocks and flow field distribution are discussed.The results indicate that it is feasible to substitute artificial block for stone layer.It provides the basises for exploration the dynamic characteristics when the protective layer is instability,and it can provide some references for analysis the feasibility of using artificial block instead of stone layer in further engineering design.