Добірка наукової літератури з теми "Elastic wave conversion"
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Статті в журналах з теми "Elastic wave conversion"
Paul, Anne, and Michel Campillo. "Diffraction and conversion of elastic waves at a corrugated interface." GEOPHYSICS 53, no. 11 (November 1988): 1415–24. http://dx.doi.org/10.1190/1.1442421.
Повний текст джерелаXu, Shibo, and Alexey Stovas. "Estimation of the conversion point position in elastic orthorhombic media." GEOPHYSICS 84, no. 1 (January 1, 2019): C15—C25. http://dx.doi.org/10.1190/geo2018-0375.1.
Повний текст джерелаBelyayev, Yu N., E. I. Yashin, and O. Y. Yashina. "Conversion of Elastic Wave Polarization in Calcium Molybdate Layer." Solid State Phenomena 284 (October 2018): 95–100. http://dx.doi.org/10.4028/www.scientific.net/ssp.284.95.
Повний текст джерелаZeng, Yuehua. "Theory of scattered P- and S-wave energy in a random isotropic scattering medium." Bulletin of the Seismological Society of America 83, no. 4 (August 1, 1993): 1264–76. http://dx.doi.org/10.1785/bssa0830041264.
Повний текст джерелаDe Ponti, Jacopo Maria, Luca Iorio, and Raffaele Ardito. "Graded elastic meta-waveguides for rainbow reflection, trapping and mode conversion." EPJ Applied Metamaterials 9 (2022): 6. http://dx.doi.org/10.1051/epjam/2022004.
Повний текст джерелаLee, Jin Kyung, Sang Ll Lee, Joon Hyun Lee, and Young Chul Park. "Propagation Characteristic of Elastic Wave in Pipe." Key Engineering Materials 345-346 (August 2007): 1323–26. http://dx.doi.org/10.4028/www.scientific.net/kem.345-346.1323.
Повний текст джерелаLi, Ke, Shuangxi Jing, Jiangong Yu, and Bo Zhang. "Complex Rayleigh Waves in Nonhomogeneous Magneto-Electro-Elastic Half-Spaces." Materials 14, no. 4 (February 21, 2021): 1011. http://dx.doi.org/10.3390/ma14041011.
Повний текст джерелаParker, Samuel D., Michael R. Haberman, and Daniel R. Roettgen. "Time-varying elastic wave mode conversion in vibrating elastic beams with subwavelength nonlinearity." Journal of the Acoustical Society of America 152, no. 4 (October 2022): A294. http://dx.doi.org/10.1121/10.0016326.
Повний текст джерелаBelyayev, Yuriy N. "Calculation of the Six-Beam Diffraction in Layered Media Using Polynomials of Principal Minors." Journal of Theoretical and Computational Acoustics 26, no. 02 (June 2018): 1850017. http://dx.doi.org/10.1142/s2591728518500172.
Повний текст джерелаWandowski, Tomasz, Pawel Malinowski, and Wieslaw Ostachowicz. "Analysis of S0/A0 elastic wave mode conversion phenomenon in glass fibre reinforced polymers." MATEC Web of Conferences 188 (2018): 01009. http://dx.doi.org/10.1051/matecconf/201818801009.
Повний текст джерелаДисертації з теми "Elastic wave conversion"
Yi, Kaijun. "Controlling guided elastic waves using adaptive gradient-index structures." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEC044/document.
Повний текст джерелаGRadient INdex (GRIN) media are those whose properties smoothly vary in space or/and time. They have shown promising effects in many engineering applications, such as Structural Health Monitoring (SHM), vibration and noise control, energy harvesting, etc. On the other hand, piezoelectric materials provide the possibility to build unit cells, whose mechanical properties can be controlled on-line. Motivated by these two facts, adaptive GRIN structures, which can be realized using shunted piezoelectric materials, are explored in this dissertation to control guided elastic waves. Two types of adaptive GRIN structures are studied in this work. The first type is a piezo-lens. It is composed of shunted piezoelectric patches bonded on the surfaces of plates. To control the mechanical properties of the piezoelectric composite, the piezoelectric patches are shunted with Negative Capacitance (NC). By tuning the shunting NC values, refractive indexes inside the piezo-lens are designed to satisfy a hyperbolic secant function in space. Numerical results show that the piezo-lens can focus waves by smoothly bending them toward the designated focal point. The piezo-lens is effective in a large frequency band and is efficient in many different working conditions. Also the same piezo-lens can focus waves at different locations by tuning the shunting NC values. The focusing effect and tunable feature of piezo-lens make it useful in many applications like energy harvesting and SHM. The former application is fully discussed in this thesis. The focusing effect at the focal point results in a known point with high energy density, therefore harvesting at the focal point can yield more energy. Besides, the tunable ability makes the harvesting system adaptive to environment changes. The second type is the time-space modulated structure. Its properties are modulated periodically both in time and space. Particularly, the modulation works like a traveling wave in the structure. Due to the time-varying feature, time-space modulated structures break the reciprocity theorem, i.e., the wave propagation in them is nonreciprocal. Many unusual phenomena are observed during the interaction between waves and time-space modulated structures: frequency splitting, frequency conversion and one-way wave transmission. Two types of frequency conversion are demonstrated and explained. The first type is caused by energy transmission between different orders Bloch modes. The second type is due to the Bragg scattering effect inside the modulated structures. The one-way wave transmission could be exploited to realize one-way energy insulation in equivalent infinite or semi-inffnite systems. However, the one-way energy insulation fails in finite systems due to the frequency conversion phenomenon
Ahmed, Mustofa N. "A Study of Guided Ultrasonic Wave Propagation Characteristics in Thin Aluminum Plate for Damage Detection." University of Toledo / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1387732124.
Повний текст джерелаGendron, Benjamin. "Modélisation et optimisation d’un système de récupération de l’énergie des vagues électro-actif déformable." Thesis, Ecole centrale de Nantes, 2017. http://www.theses.fr/2017ECDN0024.
Повний текст джерелаWave energy converters have greatly improved since the first generation in the 1970s. At first rigid with articulated sections, new wave energy converters are now entirely flexible like the S3 developped by the company SBM Offshore. The device is made of a water filled elastic tube closed at both ends and the radial deformations are directly converted into electricity by the use of electro-active polymere rings. The objective of this thesis is to develop a numerical model that can predict the behaviour of this flexible wave energy converter in any kind of environment. After performing scaled model tests, it has been possible to analyse the behaviour of the device and build a numerical model that takes into account the different physical effects acting on the wave energy converter. The numerical model is based on a modal decomposition of the tube deformations. The wall non-linear effects are taken into account with the use of the hyper-elastic theory and the wave-structure interaction is made possible with the linear boundary element method. Two different versions have been developped. One based on the linear frequency domain and the other working in the time domain in order to take into account the non-linear effects. Finally, The simulations are compared with the measures from the basin tests to validate the results
Parpiiev, Tymur. "Ultrafast magneto-acoustics in magnetostrictive materials." Thesis, Le Mans, 2017. http://www.theses.fr/2017LEMA1044/document.
Повний текст джерелаWith the advent of femtosecond lasers it became possible to measure how femtosecond optical demagnetization can probe the exchange interaction in ferromagnetic metals. Laser-induced demagnetization of materials with strong magneto-elastic coupling should lead to the release of its build-in strains, thus to the generation of both longitudinal (L) and shear (S) acoustic waves. In this thesis, generation of shear picosecond acoustic pulses in strongly magnetostrictive materials such as Terfenol is processed analytically and shown experimentally. In case of Terfenol with strong magneto-crystalline anisotropy, laser induced demagnetostriction is responsible for S excitation. First, the phenomenological model of direct magnetostriction in a Terfenol monocrystalline film is developed. The shear strain generation efficiency strongly depends on the orientation of the film magnetization. Time-resolved linear MOKE pump-probe experiments show that transient laser-induced release of the magnetoelastic strains lead to the excitation of GHz L and S acoustic waves. These results are the first experimental observation of picosecond shear acoustic wave excitation by laser-induced demagnetostriction mechanism. Second, the interaction of an optically generated L acoustic pulse with the magnetization of a Terfenol thin film is reported. Arrival of the picosecond strain wave alters a change of its magnetization and leads to acoustic mode conversion, which is another pathway of shear acoustic wave generation. The frequency bandwidth of the generated acoustic pulses matches the demagnetization timescale and lies in the range of several hundreds of GHz, close to 1 THz
Частини книг з теми "Elastic wave conversion"
Chimenti, Dale, Stanislav Rokhlin, and Peter Nagy. "Reflection and Refraction of Waves at a Planar Composite Interface." In Physical Ultrasonics of Composites. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780195079609.003.0008.
Повний текст джерела"Reflection, Transmission, and Mode Conversion of Elastic Plane Waves at Planar Boundaries between Homogeneous Nondissipative Materials." In Ultrasonic Nondestructive Testing of Materials, 309–94. CRC Press, 2012. http://dx.doi.org/10.1201/b11724-12.
Повний текст джерелаТези доповідей конференцій з теми "Elastic wave conversion"
Rhee, Huinam. "A New Analysis of Elastic Wave Resonance Scattering From an Elastic Cylinder." In ASME 1998 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/imece1998-0526.
Повний текст джерелаShoro, Takuya, Hiroki Kishikawa, and Nobuo Goto. "Optical OAM Mode Conversion by Higher Order Elastic Vortex Wave." In 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC). IEEE, 2019. http://dx.doi.org/10.23919/ps.2019.8817832.
Повний текст джерелаLangenberg, K. J., and A. Zimmer. "Utilization of elastic wave mode conversion in electromagnetic diffraction tomographic imaging schemes." In 2009 International Conference on Electromagnetics in Advanced Applications (ICEAA). IEEE, 2009. http://dx.doi.org/10.1109/iceaa.2009.5297629.
Повний текст джерелаGeorgiou, Ioannis T. "On the Physics of Conversion of Longitudinal Elastic Waves Into Extended Vibrations in a Suspended Aluminum Rod." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65726.
Повний текст джерелаZhang, Minghui, Hui Sun, Tielin Sun, Wenjian Chen, and Tianhang Zhang. "Research on mode conversion of lamb wave at dip end face of elastic plate." In 2016 IEEE/OES China Ocean Acoustics (COA). IEEE, 2016. http://dx.doi.org/10.1109/coa.2016.7535722.
Повний текст джерелаShoro, Takuya, Hiroki Kishikawa, and Nobuo Goto. "Analysis of Optical OAM Mode Conversion Using Elastic Vortex Wave in Graded Index Optical Fiber." In Photonic Networks and Devices. Washington, D.C.: OSA, 2018. http://dx.doi.org/10.1364/networks.2018.new1f.1.
Повний текст джерелаZhou, B., Y. Wang, S. Greemhalgh, and X. Liu. "Frequency-Domain Wavefield Differences and Conversion Between 2.5D and 2D Seismic Wave Modelling in Elastic Anisotropic Media." In 81st EAGE Conference and Exhibition 2019. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201901537.
Повний текст джерелаWu, Ji, Cetin Cetinkaya, and Chen Li. "An Efficiency Study of Laser-Induced Thermoelastic Wave Generation in Layers." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-1646.
Повний текст джерелаAlam, Mohammad-Reza. "A Flexible Seafloor Carpet for High-Performance Wave Energy Extraction." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-84034.
Повний текст джерелаYi, Kaijun, Manuel Collet, and Sami Karkar. "Unusual Dynamic Behaviors Induced by Time-Space Modulated Structures." In ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3777.
Повний текст джерела