摘要
为了对滑坡导致涌浪形成、传播特征进行研究,建立了水槽块体滑坡模型。利用小波变换方法得到涌浪对应时频域能量谱,发现低频成分较高频成分传播速度更快,涌浪体现出频散波特性。分析了滑块入水速度、滑块密度、滑块体积等基本因素对涌浪特征的影响。对上述基本因素进行无量纲化处理,经多元线性回归分析得到涌浪相关物理参数经验公式,对比了前人公式,对实验数据拟合效果较好,为实际滑坡涌浪灾害预防提供支持。
A flume block landslide model has been built to study the surge formation and propagation caused by landslide.An energy spectrum of time-frequency domain is obtained by using wavelet transform method.It showed that low frequency medium is of higher propagation speed than high frequency medium.And the surge is characterized with wave dispersion.The basic factors that affect the surge are analyzed,including the diving velocity,density and volume of a slider.Non-dimensionalization of the above factors leads to the empirical formula for surge physical parameters by using multiple linear regression method.By comparing with previous formulas,the empirical formula better fits the experimental data,which will protect the project from landslide surge.
作者
戴磊
白志刚
Dai Lei;Bai Zhigang(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China)
出处
《港工技术》
2018年第4期1-5,共5页
Port Engineering Technology
基金
国家自然科学基金资助项目(41276086)
关键词
滑坡涌浪
波能谱
最大波峰
首浪衰减
landslide impulse wave
wave energy spectrum
maximum wave crest
primary wave attenuation
