一种起伏板防波堤最优支撑刚度计算方法

带有弹簧支撑的水平板结构，可在波浪作用下起伏运动进行消浪，作为防波堤具有广泛的应用前景，但如何设计支撑刚度仍是当前研究的重点课题。基于黏性流理论建立数值波浪水槽，开展规则波与起伏板防波堤相互作用的模拟，得到起伏板透反射系数随支撑刚度的变化曲线，并分析最小透射系数对应刚度下起伏板运动相位对消浪的影响。为快速得到最小透射系数对应的支撑刚度，根据弹簧—阻尼—质量模型，建立一种以运动相位为输入反推起伏板最优支撑刚度的计算方法，并将推导结果与数值结果进行比较。结果表明，该方法推导的最优支撑刚度值与数值最优值接近，且可省去遍历取最优值的步骤，可为起伏板防波堤的支撑刚度设计提供参考。

A method for obtaining the optimal support stiffness of heaving plate breakwater

Horizontal plate with an elastic support can form heaving responses under waves to improve its wave dissipation performance, which has great potential to serve as a breakwater, but how to design the support stiffness is still the key topic of current research. In this study, a numerical wave flume is established based on the viscous flow theory, the interaction between regular waves and heaving plate breakwater is simulated, the variation of the transmission/reflection coefficient of the heaving plate with support stiffness is obtained, and the plate''s phase corresponding to the minimum transmission coefficient on the wave dissipation effect is analyzed. In order to quickly obtain the support stiffness corresponding to the minimum transmission coefficient, the spring-damping-mass model is introduced to establish a method for calculating the optimal support stiffness by inputting the moving phase, and the deduced stiffness and the numerical optimal stiffness are compared. The results show that the optimal support stiffness derived by this method is close to the numerical optimal value, therefore the traversing step can be omitted. This method can provide guidance for support stiffness design of heaving plate breakwater.