Este trabalho teve como objetivo a realização de um estudo sobre o método MASW (Análise Multicanal de Ondas de Superfície) avaliando-se comparativamente resultados obtidos por diferentes fontes (ativas e passivas), ondas Rayleigh e Love e diferentes modos de propagação das ondas de superfície. Dois ensaios sísmicos foram executados: com geometria de aquisição bidimensional e geofones triaxiais de 10Hz, e com geometria linear e geofones de componente vertical de 4,5Hz. Foram realizados estudos com as fontes marreta, compactador de solo, ruído ambiental e com o tráfego de veículos, a última através da técnica Passive Roadside MASW. Resultados de inversões com dados da componente vertical (ondas Rayleigh) das ondas de superfície foram avaliados com os de inversões conjuntas com a componente radial (ondas Rayleigh) e transversal (ondas Love). Analisou-se também os produtos de inversões da curva de dispersão do modo fundamental com os de inversões conjuntas com o primeiro modo superior. Os estudos foram realizados em frente ao Instituto de Astronomia, Geofísica e Ciência Atmosféricas (IAG) localizado no interior do campus Cidade Universitária Armando de Salles Oliveira (CUASO) da Universidade de São Paulo (USP) no bairro do Butantã, São Paulo. A área de estudo possui informações de sondagem mista com descrição geológica do material e valores SPT (Standard Penetration Test) que foram utilizados para validação dos resultados. O compactador de solo demonstrou ser uma melhor fonte ativa em relação a marreta através de diferentes aspectos: geração de maior energia tanto na componente vertical quanto na transversal; espectros (V,f) de melhor qualidade; os dados apresentam a vantagem de poderem ser processados através da técnica f-k beamforming. A aquisição com o ruído ambiental não possibilitou a interpretação de curvas de dispersão devido ao pouco tempo de aquisição utilizado. Os dados obtidos pela técnica Passive Roadside MASW contribuíram com os dados de ativa através do registro de frequências mais baixas. Além disso, devido a clara identificação do 1° modo superior em seu espectro (V,f) foi possível a identificação do mesmo modo no espectro (V,f) dos dados de ativa, interpretação até então duvidosa. No entanto, a inversão conjunta das curvas de dispersão dos dados Passive Roadside com as dos dados de ativa não resultou em uma melhor inversão comparada com a inversão obtida apenas pelas curvas de ativa. A inversão conjunta de curvas das componentes radial (ondas Rayleigh) e transversal (ondas Love) com as curvas obtidas da componente vertical (ondas Rayleigh) também não trouxe um melhor resultado quando comparada com a inversão alcançada apenas com as curvas da componente vertical. A utilização do primeiro modo superior com o modo fundamental, no entanto, mostrou trazer melhoras significativas nos resultados das inversões em comparação com inversões apenas da curva do modo fundamental. Considerando as incertezas envolvidas os melhores resultados deste trabalho são convergentes com os dados de sondagem da área de estudo. No atual estágio de desenvolvimento do método MASW diversas etapas são bastante dependentes do operador. Neste sentido os estudos realizados neste trabalho contribuem para um melhor entendimento do método nos seus fundamentos, parâmetros de aquisição e processamento. / This work aim to study the MASW (Multichannel Analysis of Surface Waves) method by comparing results obtained with different sources (active and passive), Rayleigh and Love waves and different modes of surface waves propagation. Two seismic tests were performed: one with two-dimensional acquisition geometry and 10Hz triaxial geophones, and the other with linear geometry and 4.5 Hz vertical component geophones. Studies were carried out with the following sources: sledgehammer, rammer compactor, ambient noise and vehicular traffic, the last through the Passive Roadside MASW technique. Inversions results with vertical component data (Rayleigh waves) were evaluated through joint inversions with the radial (Rayleigh waves) and transversal (Love waves) components. It were also analyzed the inversions results of the fundamental mode of the dispersion curve with the results of joint inversions with the first higher mode. The studies were carried out in front of the Instituto de Astronomia, Geofísica e Ciência Atmosféricas (IAG) (Institute of Astronomy, Geophysics and Atmospheric Science) located inside the university campus Cidade Universitária Armando de Salles Oliveira (CUASO) of Universidade de São Paulo (USP) (University of São Paulo) in the neighborhood of Butantã, São Paulo. The study area has information with a geological material description and SPT (Standard Penetration Test) values that were used to validate the results. The rammer compactor showed to be a better active source in relation to sledgehammer through different aspects: generation of greater energy in vertical and transverse components; better quality of (V,f) spectrum; the data have the advantage that they can be processed using the f-k beamforming technique. The acquisition with ambient noise did not allow the dispersion curves interpretation due to the short acquisition time used. Passive Roadside MASW data contributed to the active data through the lower frequency. Besides that, due to the clear identification of the 1st higher mode in its (V,f) spectrum it was possible to identify the same mode in the (V,f) spectrum of the active data, interpretation that was, until then, doubtful. However, the joint inversion of the Passive Roadside dispersion curves with the active curves did not produce better results compared to the inversion obtained only by the active curves. The joint inversion of dispersion curves from radial (Rayleigh) and transversal (Love waves) components with the curves obtained by the vertical component (Rayleigh waves) also did not bring a better result when compared with the inversion achieved only by the vertical component curves. The use of the first higher mode with the fundamental mode, however, showed significant improvements in the joint inversions results compared to inversions only of the fundamental mode curve. Considering the uncertainties involved, the best results of this work converge with the a priori information of the study area. At the current MASW method stage of development, several steps are quite dependent on the operator. Therefore, the studies carried out in this work contribute to a better understanding of the method in its fundamentals, acquisition parameters and processing.

Cette thèse porte sur l’étude numérique et expérimentale de l’utilisation de métamatériaux pour le contrôle des ondes à la surface de l’eau. Dans la première partie, nous avons montré comment focaliser les ondes à la surface de l’eau en utilisant une analogie existant avec des métamatériaux électromagnétiques de permittivité diélectrique quasi nulle qualifiés de ”epsilon-near-zero”. Cela a permis d’adapter le motif de phase à l’interface circulaire entre deux domaines présentant un contraste élevé de profondeur d’eau. L’analogie a donné lieu a un comportement fortement non linéaire des ondes, qui se manifeste par la génération d’une cascade de points focaux associés à des sous-multiples de longueurs d’onde par rapport à l’onde incidente. La deuxième application envisagée des métamatériaux pour les ondes à la surface est de rendre invisible les défauts géométriques d’un guide pour un observateur situé en champ lointain. Dans le premier projet lié au cloaking, des guides d’onde possédant différentes sections transverses ont été analysés. L’efficacité de la bathymétrie, donnée par la cartographie conformationnelle, a été evaluée numériquement en termes de propriétés de diffusion. Dans le second projet, nous avons montré numériquement comment rendre invisible un cylindre qui est décalé de l’axe d’un guide d’onde. Utiliser une bathymétrie de cloaking lisse autour du cylindre permet de reduire de manière significative la dispersion dans une large gamme de frequences. Des experiences réalisées avec des bathymétries conformes aux simulations ont confirmé une augmentation de la transmission par rapport à un scenario de référence avec fond plat. / This thesis presents numerical and experimental results concerning usage of metamaterials for water waves control. Two applications were considered. Firstly, we showed how to focus water waves using analogy to a group of metamaterials called epsilon-near-zero. This allowed to tailor phase pattern at the circular interface between two domains with high contrast in water depth. The analogy resulted in highly nonlinear behaviour of waves, manifested by sub-wavelength cascade of focal spots with respect to the incident wave. The second considered application of metamaterials for water waves was hiding (cloaking) defects in a waveguide from the far-field observer. In the first project, related to cloaking, waveguide with varying cross-sections was analyzed. The efficiency of bathymetry, rendered by conformal mapping, was evaluated in terms of scattering properties. The influence of water waves dispersivity on the cancellation of scattering was also determined. Cloaking properties of the obtained bathymetry were experimentally confirmed using a wave packet characterized by broadband spectrum. In the second project, we showed how to cloak a cylinder that is shifted from the centreline of a waveguide. Smooth cloaking bathymetry surrounding a cylinder was able to significantly reduce the scattering in broad range of frequencies. The experimental counterparts confirmed increase in transmission with respect to a reference case with flat bathymetry. The remainder of the thesis presents novel method for the analysis of fringe profilometry images. Performance of the new method was compared to the Fourier Transform Profilometry. We obtained significant enhancement in spectral capabilities.

Les ondes de surface se propagent le long de la surface terrestre par-delà l'horizon et ces propriétés de propagation sont des atouts pour diverses applications industrielles (civiles ou militaires) opérant dans la bande HF. C'est le cas notamment des radars transhorizon, des systèmes de communications, de la détection de tsunami, ou encore l'étude de la courantologie. Actuellement, les aériens utilisés dans ce contexte ne sont pas optimisés pour privilégier la propagation par ondes de surface. C'est dans ce contexte que TDF, la Direction Générale de l'Armement (DGA) et l'Institut d'Electronique et de Télécommunications de Rennes (IETR) se sont associés pour proposer cette thèse. L'objectif principal de la thèse est de concevoir des antennes en bande HF de dimensions réduites (<3 mètres) réduisant le rayonnement vers le ciel afin favoriser l'onde de surface. Une première approche a permis de concevoir deux antennes élémentaires, l'une omnidirectionnelle et l'autre directive, permettant de réduire le rayonnement vers le ciel pour les sites compris entre -45° et +45°. Les solutions proposées sont de tailles très réduites grâce à l'utilisation d'une antenne à polarisation verticale électriquement courte dans le plan vertical et de parasites horizontaux alimentés par couplage EM. Les études expérimentales réalisées à échelle réelle sont en bon accord avec les performances théoriques obtenus à l'aide de logiciels d'analyse électromagnétique commerciaux. Une seconde approche a permis de concevoir des réseaux d'antennes électriquement courtes dans le plan vertical selon une disposition linéaire des aériens. La réduction du rayonnement vers le ciel est réalisée grâce aux réseaux de type Endfire/Broadside. Enfin, une troisième étude a permis de concevoir deux systèmes antennaires agiles en diagrammes tout en conservant les propriétés de réduction de rayonnement vers le ciel. Le premier système à l'aide d'antennes électriquement courtes dans le plan vertical chargées par des réactances, et le second en appliquant une pondération en amplitude et en phase d'un réseau à deux dimensions. / The surface-waves propagate beyond the horizon. This phenomenon is an attractive feature for many applications operating in the HF band both in civil or military field. By example, we can quote the High Frequency Surface Waves Radar (HFSWR), communicating systems, or the study of the currentology. Currently, the antennas used in the field of surface-waves propagation are not fully optimized and radiate also in sky wave. In order to optimize the radiation pattern of the antennas used in these systems, the company TDF, the Direction Générale de l’Armement (DGA) and the Institute of Electronic and Telecommunications of Rennes (IETR) have proposed this projetct. The main objective of this work is to design electrically small antennas in the vertical plane (< 3 meters) in the HF band while reducing the radiation toward the sky. The first concept is based on vertically polarized antennas electrically small in the vertical plane coupled to horizontally radiators placed above the antenna. As a result, the radiation pattern in the horizontal plane is omnidirectional or directive with a radiation toward the sky reduced for the elevations range from -45° to +45°. Prototypes have been realized and validated by measurements. Then, in the second study we have developed antennas array in order to reduce the radiation toward the sky with another way that the horizontal radiators. This method allows reducing significantly the radiation toward the sky according to the number of elements in the array. Finally, in the third study we have studied electronically scanning antennas while maintaining the reduction of the radiation toward the sky. The first system is based on an array of radiator loaded by reactance, and the second is based on a planar array with an appropriate feeding.

Cette étude porte sur la dynamique instationnaire d'une bulle de Taylor dans un tube vertical en repère oscillant. L'objectif est de réaliser une étude expérimentale quantitative plus détaillée de cet écoulement instationnaire, très peu abordé dans la littérature. Les résultats expérimentaux sont obtenus pour des grands nombres de Reynolds pour comprendre les effets d'inertie. Deux configurations différentes sont étudiées : 1) tubes avec deux diamètres internes différents (9,8 mm et 20 mm) remplis d'eau, 2) le tube de diamètre D=9,8 mm rempli de quatre fluides peu visqueux. Le nombre de Bond Bo, basé sur la vitesse ascendante en cas stagnant, varie alors entre 13 et 57, où les effets de la tension superficielle peuvent être pris en compte. La bulle est suivie à l'aide d'une caméra rapide. les vitesses moyenne et fluctuante et le déphasage avec le plateau oscillant sont obtenus par traitement d'images et traitement numérique des données. Les résultats principaux montrent que pour les faibles accélérations la vitesse moyenne diminue et la vitesse fluctuante augmente lorsque l'accélération relative augmente. Au delà d'une accélération critique, la vitesse moyenne augmente et l'augmentation de la vitesse fluctuante semble ralentir. Ce changement de comportement semble être lié à la déformation de l'interface (courbure modifiée, ondes de surface) qui devient significative aux accélérations élevées. De plus, les comparaisons avec les résultats numériques obtenus en négligeant les effets capillaires sont effectuées. Des corrélations permettant de calculer les vitesses moyenne et fluctuante sont proposées. L'évolution temporelle de rayon de courbure au voisinage du nez de la poche est également étudiée pour les différentes accélérations et les résultats sont comparés avec le cas stagnant. Pour les accélérations élevées, la formation et la propagation des ondes oscillantes qui affectent la dynamique de l'écoulement sont quantifiées / The present work deals with the motion of a Taylor bubble rising through vertical oscillating pipes. The aim is to perform a more detailed and experimental quantitative study of this unsteady flow, still seldom addressed in the literature. The investigation is restricted to high Reynolds numbers to understand inertia effects. Experimental results are provided for two different configurations : 1) pipes with two different inner diameters (9.8 mm and 20 mm) filled with water, 2) the thinner pipe (D=9.8 mm) filled with four low viscous fluids. So the Bond number Bo, based on the steady rise velocity varies from 13 to 57, where the effects of surface tension can be considered. The bubble trajectory is tracked by using a high-speed video camera. The average terminal and fluctuating velocity, as well as the phase shift with the oscillating plate are obtained by using image processing. The main results show that for weak acceleration, the mean velocity decreases with the relative acceleration as the fluctuating velocity increases in proportion to this acceleration. Beyond a critical relative acceleration, the average velocity increases and the fluctuating velocity increase seems to slow down. This behavior change seems to be related to the interface deformation (modified curvature, surface waves) which becomes significant in high accelerations. Additionally, comparisons are made with the numerical results obtained by neglecting the capillary effects. Correlations allowing the prediction of mean and fluctuating velocities depending on the Bond number and relative acceleration are proposed and compared with our experimental results. The time evolution of the radii of curvature in the vicinity of the bubble nose is also studied for different relative accelerations and the results are compared with the stagnant case. In high accelerations, the formation and propagation of surface waves which may influence the bubble dynamics are quantified

Orientador: Odilon Divino Damasceno Couto Júnior / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin / Made available in DSpace on 2018-08-28T03:39:00Z (GMT). No. of bitstreams: 1 Covacevice_AllanCassioTrevelin_M.pdf: 15137963 bytes, checksum: 6269264b01d872c4b40e0034a1575cf5 (MD5) Previous issue date: 2015 / Resumo: Neste trabalho, implementamos cálculos feitos através do método de elementos finitos no estudo de propriedades mecânicas e ópticas de microcavidades ópticas planares (POMCs) quando estas estão sob os efeitos de modulação induzidos por ondas acústicas de superfície (SAWs). Começamos resolvendo separadamente os problemas de modulação mecânica e caracterização de modos ópticos. Após isso, fundimos esses dois modelos em um terceiro, permitindo a caracterização da modulação acusto-óptica do sistema, o que nos permite também calcular as alterações induzidas nas propriedades ópticas das POMCs devido às SAWs. Concentramos nossa atenção em POMCs que possuem refletores de Bragg (DBRs) compostos por camadas de materiais fortemente piezoelétricos, como o ZnO e o LiNbO3. Mostramos que, usando em torno de 10 DBRs acima e abaixo da cavidade óptica, POMCs baseadas em ZnO/SiO2 e LiNbO3/SiO2 poderiam, em princípio, apresentar fatores de qualidade excedentes a 104. O alto confinamento de luz na cavidade permite-nos observar efeitos relacionados ao forte acoplamento fóton-fônon induzido pelas SAWs. Em particular, mostramos como a presença de SAWs confere a formação de super-redes ópticas dinâmicas induzidas acusticamente, as quais são caracterizadas pela dobradura ("folding") da dispersão dos fótons na cavidade, e pelo surgimento de "mini" zonas de Brillouin. Nossos resultados estão de acordo com resultados experimentais presentes na literatura. Eles abrem a possibilidade de caracterização de modulações acusticamente induzidas em sistemas de camadas arbitrários e criam uma plataforma muito boa para interpretação de resultados experimentais / Abstract: In this work, we implement finite element method calculations to study the mechanical and optical properties of planar optical microcavities (POMCs) under the strain modulation induced by surface acoustic waves (SAWs). We start by solving separately the problems of mechanical modulation and optical mode characterization. Afterwards, we merge the two models in a single one which enables the characterization of the acousto-optic modulation in the system and allows us to calculate the SAW induced modification in the optical properties of POMCs. We concentrate our attention in POMCs which have distributed Bragg reflectors (DBRs) composed of layers of highly piezoelectric materials like ZnO and LiNbO3. We show that, using around 10 DBRs on top and below the optical cavity layer, POMCs based on ZnO/SiO2 and LiNbO3/SiO2 could, in principle, have Q-factors exceeding 104. The strong light confinement in the cavity allows us to the observe effects related to the strong photon-phonon coupling induced by the SAW. In particular, we show how the presence of SAWs leads to the formation of acoustically induced dynamic optical superlattices, which are characterized by the folding of photon dispersion in the cavity and the appearance of "mini" Brillouin zones. Our results are in very good agreement with experimental results reported in literature. They open the possibility of characterization of acoustically induced modulation in arbitrary layered systems and create a very good platform for interpretation of experimental results / Mestrado / Física / Mestre em Física / 2013/118635-2 / 2012/11382-9 / CAPES / FAPESP

Thesis (S.M. in Electrical Engineering)--Joint Program in Oceanography and Oceanographic Engineering (Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and the Woods Hole Oceanographic Institution), 2000. / Includes bibliographical references (leaves 64-65). / by James Willard Partan. / S.M.in Electrical Engineering

We carry out non-invasive ambient noise investigation of rock structures in Bohemian Paradise (Bohemian Cretaceous Basin, Czech Republic). The study is focused on two key topics: 1) An in-situ elastic moduli estimate of competent, horizontally deposited sandstone layers. This is done by performing an ambient noise array measurement. The recording is processed with f-k array analysis, from which frequency-dependent Love and Rayleigh wave dispersion curves as well as the Rayleigh wave ellipticity are retrieved. The data are inverted for P- and S-wave velocity profiles, from which the Young's and shear modulus are successfully estimated. 2) Study of local response of Kapelník rock tower. We analyse a dataset of ambient noise recordings from the top of the tower and from its foot. Information about tower oscillation frequencies and directions, together with amplification ratios, are retrieved from particle motion polarisation analysis and from site-to-reference spectral ratios. The Euler-Bernoulli beam theory is finally used to interpret the measured data using the elastic moduli estimated from the noise array measurement. Keywords: Bohemian Paradise, rock tower, seismic ambient noise, seismic surface waves

A vortex-panel method for potential flow is used as a basis for modeling surface effects and creating a finite-element interface so that an arbitrary body can be analyzed. The basic model consists of triangular panels of linearly varying vorticity which represent the body, vortex cores on the lifting edges of the body, and vortex filaments representing the wake. The interface modification is made by using a finite-element application's output as the basis for an input file for the model, executing the main program, and writing body and wake output readable by the finite-element application. The surface-effect modification is made by including an image of the body below the real body to create a surface boundary condition through symmetry. / Master of Science

Two surface wave testing methods, namely, (i) the spectral analysis of surface waves (SASW), and (ii) the multi-channel analysis of surface waves (MASW), form non-destructive and non-intrusive techniques for predicting the shear wave velocity profile of different layers of ground and pavement. These field testing tools are based on the dispersive characteristics of Rayleigh waves, that is, different frequency components of the surface wave travel at different velocities in layered media. The SASW and MASW testing procedure basically comprises of three different components: (i) field measurements by employing geophones/accelerometers, (ii) generating dispersion plots, and (iii) predicting the shear wave velocity profile based on an inversion analysis. For generating the field dispersion plot, the complexities involved while doing the phase unwrapping calculations for the SASW technique, while performing the spectral calculations on the basis of two receivers’ data, makes it difficult to automate since it requires frequent manual judgment. In the present thesis, a new method, based on the sliding Fourier transform, has been introduced. The proposed method has been noted to be quite accurate, computationally economical and it generally overcomes the difficulties associated with the unwrapping of the phase difference between the two sensors’ data. In this approach, the unwrapping of the phase can be carried out without any manual intervention. As a result, an automation of the entire computational process to generate the dispersion plot becomes feasible. The method has been thoroughly validated by including a number of examples on the basis of surface wave field tests as well as synthetic test data. While obtaining the dispersion image by using the MASW method, three different transformation techniques, namely, (i) the Park’s wavefield transform, (ii) the frequency (f) -wavenumber ( ) transform and (iii) the time intercept ( -phase slowness (p) transform have been utilized for generating the multimodal dispersion plots. The performance of these three different methods has been assessed by using synthetic as well as field data records obtained from a ground site by means of 48 geophones. Two-dimensional as well as three-dimensional dispersion plots were generated. The Park’s wavefield transformation method has been found to be especially advantageous since it neither requires a very high sampling rate nor an inclusion of the zero padding of the data in a wavenumber (distance) domain. In the case of an irregular dispersive media, a proper analysis of the higher modes existing in the dispersion plots becomes essential for predicting the shear wave velocity profile of ground on the basis of surface wave tests. In such cases, the establishment of the predominant mode becomes quite significant. In the current investigation for Rayleigh wave propagation, the predominant mode has been computed by maximizing the normalized vertical displacements along the free surface. Eigenvectors computed from the thin layer approach (TLM) approach are analyzed to predict the corresponding predominant mode. It is noted that the establishment of the predominant mode becomes quite important where only two to six sensors are employed and the governing (predominant) modal dispersion curve is usually observed rather than several multiple modes which can otherwise be identified by using around 24 to 48 multiple sensors. By using the TLM, it is, however, not possible to account for the exact contribution of the elastic half space in the dynamic stiffness matrix (DSM) approach. A method is suggested to incorporate the exact contribution of the elastic half space in the TLM. The numerical formulation is finally framed as a quadratic eigenvalue problem which can be easily solved by using the subroutine polyeig in MATLAB. The dispersion plots were generated for several chosen different ground profiles. The numerical results were found to match quite well with the data available from literature. In order to address all the three different aspects of SASW and MASW techniques, a series of field tests were performed on five different ground sites. The ground vibrations were induced by means of (i) a 65 kg mass dropped freely from a height of 5 m, and (ii) by using a 20 pound sledge hammer. It was found that by using a 65 kg mass dropped from a height of 5 m, for stiffer sites, ground exploration becomes feasible even up to a depth of 50-80 m whereas for the softer sites the exploration depth is reduced to about 30 m. By using a 20 lb sledge hammer, the exploration depth is restricted to only 8-10 m due to its low impact energy. Overall, it is expected that the work reported in the thesis will furnish useful guidelines for (i) performing the SASW and MASW field tests, (ii) generating dispersion plots/images, and (iii) predicting the shear wave velocity profile of the site based on an inversion analysis.

Orientador: João Carlos Dourado / Resumo: Técnicas sismológicas como Função do Receptor, Análise de Dispersão de Ondas de Superfície, Correlação de ruídos sísmicos e razão espectral H/V são cada vez mais estudadas e utilizadas para o conhecimento geológico da crosta. Sendo possível determinar a composição crustal média e os principais contatos obtidos por fortes contrastes de impedância tais como limite crosta superior e inferior, assim como, limite crosta inferior e manto superior (descontinuidade de Moho). O conhecimento da velocidade de percurso das ondas de um sismo registrados através de uma estação sismográfica fornecem informações, como: o tempo de percurso, relação Vp/Vs e outros. A região de Pontes e Lacerda/MT está localizada no Sudoeste do Cráton Amazônico e o levantamento dos dados se deram em fases distintas com implantação de sismômetros alinhados em direção perpendicular (NE-SW) às principais estruturas da Faixa Móvel Aguapeí (NNW-SSE). Além da coleta de dados dessas estações temporárias foram compilados dados de sismos para a estação fixa PTLB, esta estação faz parte das estações sismológicas coordenadas pela UNB (Universidade Nacional de Brasília) e pela USP (Universidade de São Paulo). A espessura média encontrada na crosta para a região variou pouco para as diferentes técnicas abordadas, sendo que, para a técnica de Função do Receptor (estação fixa PTLB) foi obtido valor de aproximadamente 44 Km de espessura e, para as estações temporárias (S01 ao S10) valor médio de 42 km. Já a seção sísmica gerad... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Seismic techniques such as receiver function, surface wave dispersion, seismic noise correlation and H / V spectral ratio are increasingly studied and used for geological knowledge of the crust. It is possible to determine the average crustal composition and the main contacts obtained by strong impedance contrasts as upper and lower crust boundary, as well as, lower crust limit and upper mantle (Moho discontinuity). The knowledge of the speed of travel of the waves of an earthquake recorded through a seismographic station provides information, such as: the travel time, Vp / Vs ratio and others. The region of Pontes e Lacerda / MT is located in the Southwest of the Amazonian craton and the data were taken in different phases with the implantation of seismometers aligned in a perpendicular direction (NE-SW direction) to the main structures of the Faixa Móvel Aguapeí (direction NNW- SSE). In addition to collecting data from these temporary stations, earthquake data were collected for the PTLB fixed station. The average thickness found in the crust for the region did not vary much for the different techniques, and for the Receiver Function (PTLB fixed station), a value of approximately 44 Km of thickness was obtained and for the temporary stations (S01 to S10) average value of 42 km. The seismic section generated by the correlation of the signals for all short-time temporary stations brought the signals coherence in 4s, 5s and later coherence ranging from 9.5 to 11 seconds. This ... (Complete abstract click electronic access below) / Doutor