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不同断面形状下滑坡涌浪特性的数值模拟研究
Numerical Simulation of Landslide-Induced Wave Characteristics Under Different Cross-Section Shapes
【摘要】 针对窄深河道滑坡涌浪对沿岸设施和航运安全的威胁,基于真实地形数据构建原型、U形和V形三种河道模型,并通过数值模拟分析不同断面形状下滑坡体运动参数对涌浪特性的影响。结果表明,滑坡体入水速度与最大波高及对岸爬高呈正相关关系。不同断面形状对速度变化的响应存在显著差异,V形断面的首浪波高和首浪爬高对速度变化最为敏感,而原型断面在第二次爬高阶段对速度变化表现出较强的敏感性。入水角度与三种断面的首浪波高及首浪爬高呈负相关关系,首浪波高和首浪爬高随角度增大而降低,而第二次爬高则有所增加。入水角度的变化对涌浪特性产生差异化影响,原型和V形断面的首浪波高,以及U形断面的第二次爬高,对角度变化的响应更为显著。本研究为涌浪预测模型的建立和防控措施的制定提供了重要的参考依据。
【Abstract】 This study investigates the threat of landslide-induced waves to coastal infrastructure and shipping safety in narrow, deep rivers. Based on real topographic data, prototype, U-shaped, and V-shaped river models were constructed, and numerical simulations were conducted to analyze the impact of landslide body motion parameters on wave characteristics for different channel shapes. The results shows a positive correlation between the landslide impact velocity and both the maximum wave height and run-up. The response of different channel shapes to changes in velocity varies significantly. The wave height and run-up height on the opposite bank of the V-shaped channel are most sensitive to changes in velocity, while the prototype channel show a stronger sensitivity during the second run-up phase. The water entry angle is negatively correlated with the first wave height and run-up height for all three channel types, with both decreasing as the angle increases, while the second run-up increases. Changes in the entry angle produce differentiated effects on wave characteristics, with the first wave height of the prototype and V-shaped channels, as well as the second run-up height of the U-shaped channel, showing a more pronounced response to angle changes. This study provides important insights for the development of wave prediction models and the formulation of mitigation measures.
【Key words】 landslide-induced wave; river cross-sectional shape; run-up height; narrow deep channel;
- 【文献出处】 河南科学 ,Henan Science , 编辑部邮箱 ,2025年12期
- 【分类号】TV139.23
- 【下载频次】97