發(fā)布時間：2018-03-21 19:42

  本文選題：剪切波時空變化　切入點：規(guī)則波　出處：《河海大學學報(自然科學版)》2016年01期 　論文類型：期刊論文

【摘要】：基于物理模型試驗、小波變換理論及剪切不穩(wěn)定理論等,研究入射波為規(guī)則波、地形為平直斜坡情況下的剪切波時空變化特性。通過對15個不同波況下的剪切波流速時間歷程的小波譜進行分析,得出如下結論:入射波為規(guī)則波、地形為平直斜坡情況下可以觀測到剪切波,但是時空變化不明顯;剪切波產(chǎn)生后隨時間的變化呈現(xiàn)連續(xù)性;剪切波在沿岸方向的能量譜中比在垂直岸線方向能量譜中占優(yōu)勢;地形坡度增加會使剪切波產(chǎn)生的區(qū)域減小;無論是1∶40坡還是1∶100坡,由剪切不穩(wěn)定引起的剪切波頻率都在約0.015 Hz左右變化。
[Abstract]:The physical model test based on wavelet transform theory and the theory of shear instability, incident wave wave, the terrain is temporal and spatial variation characteristics of shear wave slope straight condition. Through the analysis of 15 different spectral shear wave condition of the wave velocity time history, and the following conclusion: the incident wave is regular wave, the terrain is flat slope under the condition of shear wave can be observed, but the temporal variation is not obvious; showed a continuous variation with time after shear wave; shear wave energy spectrum in the alongshore direction than in the direction perpendicular to the coastline in the dominant energy spectrum; the terrain slope will increase shear wave region decreases; whether 1 or 1: 100: 40 slope slope, shear wave frequency by shear instability caused by changes in about 0.015 Hz.

【作者單位】： 太原理工大學水利科學與工程學院;天津大學水利工程安全與仿真國家重點試驗室;
【基金】：中國博士后面上基金(2013M541179) 水利工程仿真與安全國家重點實驗室開放基金(HESS-1406)
【分類號】：P731.2
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本文編號：1645272