【摘要】 为了拓展水面防波堤的有效消波周期范围，本文应用Bragg共振，开展多重水面穿透箱体与潜堤组合结构物的消波性能研究。基于时域势流理论，采用去奇异边界元方法（Desingularized Boundary Integral Equation Method, DBIEM），建立数值波浪水槽，数值计算了规则波与多重等间距布置的水面箱体与水底潜堤组合的结构物之间的相互作用。通过反射系数和透射系数分析了组合结构物的Bragg共振发生点位置、反射强度和消波性能。通过将数值结果与文献数据进行比较，验证了本文数值计算方法的有效性。计算结果给出了透射系数和反射系数随2S/λ（S为相邻结构物的中心间距，λ为入射波长）的变化趋势。结果表明，规则波在多重结构物中传播时会发生Bragg共振，此时其对波浪的衰减效果明显优于单体结构物。对于多重结构物，随着其数量、宽度、水面箱体浸深的增加，Bragg共振反射强度增加，不仅降低了透射系数，而且提升了对长周期波浪的消波能力；而增加相邻组合结构物间隙拓宽了有效消减波浪的周期范围。潜堤的存在加强了防波堤对长周期波的消浪能力。本研究为组合形式的防波堤设计提供参考。更多还原

【Abstract】 To extend the effective wave attenuation period range of free surface breakwaters, a study on the wave attenuation performance of a combined structure consisting of multiple surface-piercing boxes and submerged bars was conducted using Bragg resonance. A numerical wave flume was constructed utilizing the Desingularized Boundary Integral Equation Method(DBIEM) based on time-domain potential flow theory,and the interaction between regular waves and the combined structure of multiple equally spaced free surface boxes with submerged bars was calculated numerically. The occurring condition of Bragg resonance,reflection strength and wave attenuation performance of the combined structure were analyzed through reflection and transmission coefficients. The effectiveness of the numerical calculation method in this paper was verified by comparing the numerical results with existing literature data. The variation trend of transmission and reflection coefficients with 2S/λ(S is the center distance of adjacent structures, λ is the incident wavelength) is given. The results indicate that Bragg resonance occurs when regular waves propagate through multiple structures, and the wave attenuation performance of these multiple structures is significantly better than that of single structures. For multiple structures, as the number, width, and immersion depth of the boxes increase, the reflection intensity of Bragg resonance also increases. This not only reduces the transmission coefficient but also enhances the ability to dissipate long-period waves. Furthermore, increasing the gap between adjacent combined structures mainly aims to expand the effective range of the wave attenuation period. The submerged bars improve the wave-dissipating efficacy against long-period waves.This study provides valuable insights for the design of composite breakwaters.更多还原