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The methods of time-efficient simulation of surface-excited wave propagation in plate-like multilayered composites are presented. The mathematical model of wave propagation in laminated plate based on the elasticity theory is transformed and then solved in wavenumber-frequency domain. The numerical methods for computation of inverse transform in time-space domain are developed and used for analysis of wave and energy propagation phenomena occurring in composite plates due to surface excitation.

Lamb waves --- composites --- wave propagation --- piezoelectric actuators --- structural health monitoring

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Lecture Notes in Applied and Computational Mechanics This series aims to report new developments in applied and computational mechanics – quickly, informally and at a high level. This includes the fields of fluid, solid and structural mechanics, dynamics and control, and related disciplines. The applied methods can be of analytical, numerical or computational nature. Identification of Damage Using Lamb Waves Since the early 1990s increased interest in the use of Lamb waves (dynamic stress waves travelling in thin plate/shell structures) for identifying damage in engineering structures has led to significant advances in knowledge and technology. Identification of Damage Using Lamb Waves provides essential know-how for developing Lamb-wave-based damage identification techniques. It addresses fundamentals such as the mechanisms of Lamb wave activation, propagation and acquisition, the selection of transducers and design of active sensor networks, and the development of signal processing for de-noising, compression and feature extraction in the time, frequency and joint time-frequency domains. It also provides detailed descriptions of various signal fusion algorithms for the quantitative determination of damage parameters – location, orientation, size and severity. Other key topics include: • finite element modelling and experimental techniques for Lamb waves; • active sensor network technology using various agents, e.g., piezoelectric actuator/sensor and fibre Bragg grating sensor; • software-hardware systems for implementation of Lamb-wave-based damage identification including Lamb wave signal generation, acquisition and processing; and • representative case studies and diverse engineering applications.

Lamb waves. --- Nondestructive testing. --- Structural analysis (Engineering). --- Structural analysis (Engineering) --- Lamb waves --- Nondestructive testing --- Civil Engineering --- Civil & Environmental Engineering --- Engineering & Applied Sciences --- Evaluation, Nondestructive --- Materials --- NDE (Testing) --- NDT (Testing) --- Non-destructive testing --- Nondestructive evaluation --- Architectural engineering --- Engineering, Architectural --- Structural mechanics --- Structures, Theory of --- Plate waves --- Waves, Lamb --- Waves, Plate --- Engineering. --- Continuum mechanics. --- Structural mechanics. --- Mechanical engineering. --- Automotive engineering. --- Materials science. --- Mechanical Engineering. --- Materials Science, general. --- Signal, Image and Speech Processing. --- Structural Mechanics. --- Continuum Mechanics and Mechanics of Materials. --- Automotive Engineering. --- Material science --- Physical sciences --- Engineering, Mechanical --- Engineering --- Machinery --- Steam engineering --- Structural engineering --- Mechanics of continua --- Elasticity --- Mechanics, Analytic --- Field theory (Physics) --- Construction --- Industrial arts --- Technology --- Testing --- Ultrasonic waves --- Materials. --- Mechanics. --- Mechanics, Applied. --- Solid Mechanics. --- Applied mechanics --- Engineering mathematics --- Classical mechanics --- Newtonian mechanics --- Physics --- Dynamics --- Quantum theory --- Engineering materials --- Industrial materials --- Engineering design --- Manufacturing processes --- Signal processing. --- Image processing. --- Speech processing systems. --- Computational linguistics --- Electronic systems --- Information theory --- Modulation theory --- Oral communication --- Speech --- Telecommunication --- Singing voice synthesizers --- Pictorial data processing --- Picture processing --- Processing, Image --- Imaging systems --- Optical data processing --- Processing, Signal --- Information measurement --- Signal theory (Telecommunication)

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This book was proposed and organized as a means to present recent developments in the field of nondestructive testing of materials in civil engineering. For this reason, the articles highlighted in this editorial relate to different aspects of nondestructive testing of different materials in civil engineering—from building materials to building structures. The current trend in the development of nondestructive testing of materials in civil engineering is mainly concerned with the detection of flaws and defects in concrete elements and structures, and acoustic methods predominate in this field. As in medicine, the trend is towards designing test equipment that allows one to obtain a picture of the inside of the tested element and materials. From this point of view, interesting results with significance for building practices have been obtained

microstructure --- acoustic emission AE --- rebound hammer --- service life of a structure --- horizontal casting --- precipitation --- natural frequency --- reinforced concrete chimney --- diagnostic --- moisture safety --- adhesion assessment --- gantry crane --- stress wave --- materials research --- acoustic methods --- SEM-EDS analysis --- SilverSchmidt --- reinforced concrete grandstand stadium --- concrete strength --- autoclaved aerated concrete (AAC) --- concrete elements --- reinforced concrete tanks --- degree of degradation --- fatigue tests --- X-ray micro-computed tomography --- GPR method --- defects --- singular value truncation --- ultrasonic tomography --- cement-based composites --- SEM --- moisture of AAC --- sulphate corrosion --- damage --- strengthening --- masonry structures --- eddy-current method --- non-destructive evaluation --- non-destructive testing --- NDT methods --- Structural Health Monitoring --- mercury intrusion porosimetry --- temperature --- vibration analysis --- cesium --- rebar location --- nanoindentation --- monitoring of structures --- RMF technique --- machine learning --- lead --- viscoelastic parameters --- structural tuning --- diagnostics --- resistance measurement --- thermal contrast --- non-destructive method --- destruction process --- asphalt mixtures --- solid-state NMR spectroscopy --- quasi brittle cement composites --- fibre-cement boards --- adhesive joints --- compressive strength --- nondestructive testing --- defect detection --- location of inclusions --- active thermography --- concrete strength prediction --- concrete mix design --- building materials --- micro-computed tomography --- adsorption --- timber structures --- scanning laser vibrometry --- durability --- ultrasonic wave --- surface complexation --- artificial neural networks --- civil engineering --- ultrasonic testing --- ultrasound tests --- acoustic emission --- cellulose fibre cement boards --- concrete --- excitation frequency --- data mining --- crowd-induced excitation --- ultrasound measurements --- wood moisture sensing --- acoustic spectrum --- thermovision --- corrosion processes --- four point bending beam --- spun concrete --- structural damage --- X-ray computed tomography --- waste brick dust --- concrete slabs and floorings --- mathematical morphology --- Burgers model --- pattern recognition --- brittle fracture --- data noise --- drilling resistance --- damage detection --- fiber cement boards --- thermography --- non-destructive methods --- concrete corrosion --- ultrasound --- Lamb waves --- deconvolution --- ultrasonic tests --- creep test --- shape and size of specimen --- building partition --- multiple feedbacks

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Modelling and simulation in acoustics is currently gaining importance. In fact, with the development and improvement of innovative computational techniques and with the growing need for predictive models, an impressive boost has been observed in several research and application areas, such as noise control, indoor acoustics, and industrial applications. This led us to the proposal of a special issue about “Modelling, Simulation and Data Analysis in Acoustical Problems”, as we believe in the importance of these topics in modern acoustics’ studies. In total, 81 papers were submitted and 33 of them were published, with an acceptance rate of 37.5%. According to the number of papers submitted, it can be affirmed that this is a trending topic in the scientific and academic community and this special issue will try to provide a future reference for the research that will be developed in coming years.

noise barrier --- insertion loss --- vehicle frequencies --- diffraction --- flow speed --- Analytical solutions --- FDTD --- EMATs --- beam directivity --- perforate tube silencer --- transmission loss (TL) --- pressure loss --- computational fluid dynamics (CFD) --- temperature --- air flow velocity --- graphical bilinear method --- seismic survey --- dynamic cone penetration test --- soil depth --- time-distance curve --- KZK equation --- fractional order derivative --- ultrasound hyperthermia --- HIFU --- acoustic simulation --- Kramers–Kronig relation --- stereo audio coding --- Principal Component Analysis (PCA) --- multi-frame --- Pyramid Vector Quantization (PVQ) --- bowel sound --- bowel motility --- automatic detection/evaluation --- power-normalized cepstral coefficients --- noncontact instrumentation --- acoustic localization --- cross array --- moving sound source --- discrete sampling --- error analysis --- open-air theatres --- acoustical measurements --- prediction models --- historical acoustics --- Direction of Arrival (DOA) --- time-frequency (TF) mask --- speech sparsity --- speech enhancement (SE) --- acoustic vector sensor (AVS) --- intelligent service robot --- voice generation --- multichannel electroglottograph --- larynx acoustics --- fingerprinting acoustic localization --- iterative interpolation --- K-Means clustering --- Two-stage matching --- Adjacent RPs --- dynamic tissue property --- Westervelt equation --- thermal damage zone --- submerged floating tunnel (SFT) --- mooring line --- coupled dynamics --- hydro-elastic responses --- wet natural frequencies --- mooring tension --- seismic excitation --- wave excitation --- seaquake --- thick annular circular plate --- Rayleigh integral --- finite element modeling --- rectangular and concentric stiffener patches --- taper ratio --- thickness variation --- MRI --- Zone Plates --- ultrasonic lenses --- piano playing --- vibrotactile feedback --- interaction --- musical performance --- auditory perception --- sensors --- actuators --- crack growth --- acoustic echo --- COSMO --- p-value --- l1-regularized RLS --- sparsity --- room impulse response --- total least squares --- regularization factor --- fluid-filled polyethylene (PE) pipeline --- noise control --- acoustic propagation --- cutoff phenomenon --- UWA communication --- channel modelling --- OFDM --- channel estimation --- simulation platform --- minimum variance distortionless response --- signal self-cancellation --- direction estimation --- underwater acoustic source --- spatial power spectrum --- cochlear implant --- coding strategy --- Fixed-Channel --- Channel-Picking --- vocoder simulation --- normal-hearing --- point mass --- parabolic thickness variation --- landmine detection --- lumped parameter model --- prodder --- resonance frequency --- noised-induced hearing loss --- powered surgical instruments --- ultrasonic aspirator --- transcanal endoscopic ear surgery --- balanced armature receiver --- lumped parameter method --- finite element method and Boundary element method --- focused transducer --- acoustic field --- nonuniform radiation distribution --- Bessel radiation distribution --- spherically curved uniform radiator --- rim radiation --- Lamb waves --- wooden constructions --- acoustics --- low frequency noise --- modelling --- ultrasonic guided waves --- SAFE --- rail defect detection --- mode excitation --- solid dielectrics --- acoustic emission --- artificial neural networks --- electrical treeing --- wavelets --- non-destructive testing --- high-voltage insulating systems --- boundary element method --- Helmholtz equation --- structural health monitoring --- mooring chain --- fatigue crack growth --- structural integrity --- n/a --- Kramers-Kronig relation