發(fā)布時(shí)間：2018-06-02 15:37

  本文選題：瑞利面波頻散 + 噪聲源��； 參考：《西南交通大學(xué)》2015年碩士論文

【摘要】：瑞利面波在波場(chǎng)中的能量占有比例較大,且面波速度與橫波接近,在層狀介質(zhì)中具有速度頻散特性,可用來推斷地層信息,因此瑞利面波勘探法被廣泛應(yīng)用于地下調(diào)查領(lǐng)域,目前,對(duì)主動(dòng)源瑞利面波探測(cè)方法國內(nèi)外學(xué)者已經(jīng)進(jìn)行了比較深入的研究。近年來,噪聲源瑞利面波探測(cè)方法受到廣泛關(guān)注,大量的野外工作者在實(shí)地探測(cè)中對(duì)其進(jìn)行了運(yùn)用。但是對(duì)噪聲源瑞利面波的模擬研究進(jìn)行較少,對(duì)噪聲源瑞利面波波場(chǎng)進(jìn)行物理模擬,探究噪聲源瑞利面波波場(chǎng)的普遍規(guī)律是十分有意義的。本論文主要介紹了瑞利面波理論及面波頻散特性,以超聲物理模擬為基礎(chǔ),選用合理的試驗(yàn)材料及觀測(cè)方法制成了均勻地層的試驗(yàn)?zāi)Ｐ?對(duì)噪聲信號(hào)源進(jìn)行物理模擬,采集數(shù)據(jù),并通過運(yùn)用頻率波數(shù)法(F-K法)和空間自相關(guān)法(spac法)進(jìn)行數(shù)據(jù)處理,提取頻散曲線。通過對(duì)主動(dòng)源和噪聲源兩種方法提取的頻散曲線的對(duì)比分析,指出主動(dòng)源面波勘探法更適用于淺層工程探測(cè),噪聲源方法由于探測(cè)深度較深更適用于深部地層信息的采集。通過對(duì)噪聲源的兩種數(shù)據(jù)處理方法——F-K法和spac法的對(duì)比分析,指出在提取噪聲源面波信息時(shí)spac法能有效避免體波干擾,在臺(tái)陣精度滿足要求的情況下,spac方法更適用于噪聲源瑞利面波波場(chǎng)特性的分析。
[Abstract]:Rayleigh wave has a large proportion of energy in the wave field, and the velocity of the surface wave is close to that of the shear wave. It has the characteristics of velocity dispersion in layered media and can be used to infer the formation information. Therefore, Rayleigh surface wave exploration method is widely used in the field of underground investigation. At present, the active source Rayleigh surface wave detection methods at home and abroad have been more in-depth research. In recent years, the Rayleigh surface wave detection method of noise source has received extensive attention, and a large number of field workers have applied it in the field detection. But there is little research on Rayleigh surface wave simulation of noise source. It is very meaningful to simulate Rayleigh surface wave field of noise source and explore the general law of Rayleigh surface wave field of noise source. This paper mainly introduces Rayleigh surface wave theory and surface wave dispersion characteristics. On the basis of ultrasonic physical simulation, using reasonable test materials and observation methods to make a uniform formation test model, the noise signal source is physically simulated. The frequency wave number method (F-K method) and spatial autocorrelation method (spac method) are used to process the data to extract the dispersion curve. By comparing and analyzing the dispersion curves extracted by two methods, active source and noise source, it is pointed out that the active source surface wave exploration method is more suitable for shallow layer engineering detection, and the noise source method is more suitable for the collection of deep formation information because of the deeper exploration depth. By comparing and analyzing two kinds of data processing methods of noise source, F-K method and spac method, it is pointed out that spac method can effectively avoid volume wave interference when extracting surface wave information from noise source. The method of spac is more suitable for analyzing the characteristics of Rayleigh surface wave field of noise source when the precision of array is satisfied.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P631.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 趙群,馬國慶,宗遐齡;超聲地震物理模型連續(xù)數(shù)據(jù)采集系統(tǒng)[J];地球物理學(xué)進(jìn)展;2004年04期

2 魯來玉;張碧星;汪承灝;;基于瑞利波高階模式反演的實(shí)驗(yàn)研究[J];地球物理學(xué)報(bào);2006年04期

3 趙鴻儒，王鐵男，，唐文榜;中國地球物理模型試驗(yàn)的發(fā)展[J];地球物理學(xué)報(bào);1994年S1期

4 凡友華,劉家琦,韓波;瑞利面波頻散曲線的理論計(jì)算研究[J];湖南大學(xué)學(xué)報(bào)(自然科學(xué)版);2001年03期

5 彭文;周熙襄;;利用瑞雷面波調(diào)查表層結(jié)構(gòu)的可行性分析[J];天然氣工業(yè);2006年09期

6 王振東;微動(dòng)的空間自相關(guān)法及其實(shí)用技術(shù)[J];物探與化探;1986年02期

7 趙東;;被動(dòng)源面波勘探方法與應(yīng)用[J];物探與化探;2010年06期

相關(guān)博士學(xué)位論文 前1條

1 張立;層狀介質(zhì)中瑞利面波波場(chǎng)特征分析和反演方法研究[D];西南交通大學(xué);2009年

本文編號(hào)：1969299