海广场:跳计划的实施和对单一波浪的波浪与岸边相互作用的基准研究
Yu Zhang1,2, Kunlong Yin2, Yang Tang3,4
1Central-South Architectural Design Institute Co., Ltd. (CSADI), Wuhan, China.
Scientific reports
|June 6, 2024
概括
一个新的海方块跳模型改进了从山体滑坡和其他大规模运动的冲动波预测. 这种增强的数值方案提供了更好的准确性和更低的波衰减率,用于改进工程评估.
科学领域:
- 工程 工程师 工程师 工程师
- 流体动力学 流体动力学
- 计算科学 计算科学
背景情况:
- 来自空中物质运动的冲动波对沿海设施和居民构成风险.
- 对这些波的准确预测和评估对于实际的工程应用至关重要.
- "海方块"数值方法已被用于模拟滑坡产生的冲动波.
研究的目的:
- 开发和验证一个更新的数值方案,海方块跳,用于模拟冲动波.
- 在准确性,波浪衰变和预测能力方面评估更新方案的性能.
- 为了对波浪上升,反射和陆地流动场景进行基准测试,对该方案的性能进行比较.
主要方法:
- 开发了 Tsunami Squares Leapfrog,结合了融合测试的新流功能和第二阶精度的 Leapfrog 时间集成方法.
- 通过模拟在各种条件下 (波幅,水深,斜率角度) 沿着斜坡的单个波进行了系统的基准测试.
- 对水的动态摩擦系数进行了灵敏度分析.
主要成果:
- 与原来的海广场相比,更新后的方案表现出更好的性能,波浪衰变率较低.
- 对于波浪上升,该方案在相对波幅<0.4的情况下表现良好,但在轻微/的斜坡上显示低估/高估.
- 陆地流量最大高度的预测错误在±50% (90% CI) 之内,而前部传播速度的预测错误在±100% (90% CI) 之内.
结论:
- 海方块跳为模拟冲动波提供了更高的准确性和性能,这对于风险评估至关重要.
- 该模型对波浪和陆地流量的预测能力为工程设计提供了宝贵的见解.
- 在这些模拟中,建议水的动态摩擦系数范围为0.010.1.
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