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张尧,陈新平,石先武,王宇星,国志兴,林雨霏,石晓勇,谭骏,刘钦政.相位解析有旋数值模拟在近海近岸非静压海浪荷载计算和风险分布评估上的应用[J].海洋开发与管理,2016,33(z2):79-87,104
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| 相位解析有旋数值模拟在近海近岸非静压海浪荷载计算和风险分布评估上的应用 |
| 张尧,陈新平,石先武,王宇星,国志兴,林雨霏,石晓勇,谭骏,刘钦政 |
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| 国家海洋局海洋减灾中心 |
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| 摘要: |
| 区域尺度精细化水动力数值模拟是解决大量工程、地质、环境等问题的重要手段。水动力荷载的直接冲击是近海近岸结构物、设施破坏的主要动力因素。本文章旨在介绍BoussinesqGreenNaghdi有旋非静压水动力模型及其在区域尺度灾害性海浪的非静压水动力荷载分析和风险分布评价上的应用。这套模型利用了Boussinesq量纲和GreenNaghdi加权积分的结构。速度和压力被用多项式假设来表达和非线性重排法的应用，有效地提高了模型性能，避免了无旋假设的使用，更好地模拟计算了右旋流速和非静态压力场等复杂水动力参数。模拟重现美国和菲律宾沿海台风浪过程，深入分析非静压海浪荷载作用机理，计算海浪荷载的时空分布，与巨石迁移和结构物损坏的调查数据进行对比验证，构建海浪荷载与区域结构物破坏程度分布的相关性，量化各项影响要素如流速、浪高、结构物特征等的风险权重，通过回归分析法推导基于多影响要素的区域海浪风险参数化定量评价方法。为非静压相位解析有旋水动力理论和海浪灾害机理的科学探索提供原创性基础。为沿海人类活动、区域规划、工程设计、防灾减灾等提供科学指导。 |
| 关键词: 相位解析 近海近岸 海浪荷载 风险分布 |
| DOI： |
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| 基金项目: |
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| Nonhydrostatic Simulation and Risk Assessment for Nearshore Hydrodynamics Using Phase Resolving Rotational Model |
| ZHANG Yao,CHEN Xinping,SHI Xianwu,WANG Yuxing,GUO Zhixing,LIN Yufei,SHI Xiaoyong,TAN Jun,LIU Qinzheng |
| National Marine Hazard Mitigation Service，State Oceanic Administration |
| Abstract: |
| The nearshore wave is a dominant hydrodynamic impact for engineering，geophysics and environmental problems.Nonhydrostatic impact could be a major factor for the failure of coastal structures during extreme marine events.This paper introduced，tested and applied Boussinesq-Green-Naghdi rotational hydrodynamic model to regionalscale assessment of the non-hydrostatic wave load and risk assessment in nearcoast areas during extreme marine events.It also simulated selected study areas in United States and Philippines devastated by hurricane storms with detailed flow thickness，orbital velocities，and wave forces computed.The boulder transport was found initiated by the infragravity swash bore.The intermittent loading of boulders onshore by swash bores has direct implications for loading on manmade structures，which might locate in similar regions and will experience similar forces.The non-hydrostatic wave load and the house damage state distribution are correlated with a proportional expectation.The weight analysis of velocities，wave heights and relative shielding were carried out.The regionalscale assessment method of the wave risk were derived and parameterized based on this study.The research would contribute significantly to the further exploration of the rotational phase-resolving hydrodynamics theory and the wave disaster mechanism.The assessment method would be useful to engineers and planners to design coastal communities that will withstand future marine hazards. |
| Key words: Non hydrostatic,Wave Loads,Phase-resolving |
