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作 者:WANG Wei WEI Weicheng CHAI Bo XIA Hao WANG Yang DU Juan LIU Jizhixian
机构地区:[1]School of Environmental Studies,China University of Geosciences,Wuhan 430078,China [2]Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science,Wuhan 430078,China [3]Faculty of Engineering,China University of Geosciences,Wuhan 430074,China [4]Research Center for Geohazards Monitoring and Warning in Three Gorges Reservoir,Wanzhou 404000,China
出 处:《Journal of Ocean University of China》2024年第2期328-344,共17页中国海洋大学学报(英文版)
基 金:support from the National Natural Sciences Foundation of China(Nos.42177159,42077277,41877253);the Fundamental Research Funds for the Central Universities,China University of Geosciences(Wuhan)(No.CUG2106304).
摘 要:Landslide-generated impulsive waves(LGWs)in reservoir areas can seriously threaten waterway safety as well as hu-man life and properties around the two side slopes.The risk reduction and mitigation of such a hazard require the accurate prediction of near-field wave characteristics,such as wave amplitude and run-up.However,near-field LGW involves complicated fluid-solid interactions.Furthermore,the wave characteristics are closely related to various aspects,including the geometry and physical features of the slide,river,and body of water.However,the empirical or analytical methods used for rough estimation cannot derive accurate results,especially for deformable landslides,due to their significant geometry changes during the sliding process.In this study,the near-field waves generated by deformable landslides were simulated by smoothed particle hydrodynamics(SPH)based on multi-phase flow.The deformable landslides were generalized as a kind of viscous flow by adopting the Herschel-Bulkley-Papanastasiou(HBP)-based nonNewtonian rheology model.The HBP model is capable of producing deformable landslide dynamics even though the high-speed sliding process is involved.In this study,an idealized experiment case originating from Lituya LGW and a practical case of Gongjiafang LGW were reproduced for verification and demonstration.The simulation results of both cases show satisfactory consistency with the experiment/investigation data in terms of landslide movement and near-field impulsive wave characteristics,thus indicating the applicability and accuracy of the proposed method.Finally,the effects of the HBP model’s rheological parameters on the landslide dynamics and near-field wave characteristics are discussed,providing a parameter calibration method along with sug-gestions for further applications.
关 键 词:deformable landslide impulsive waves NEAR-FIELD SPH nonNewtonian fluids
分 类 号:P642.22[天文地球—工程地质学] TV697.3[天文地球—地质矿产勘探]
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