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Showing 1 to 14 of 14 for “"Flexural Waves"”.
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Dispersion of Flexural Waves in Circular, Bi-Material Cylinders
Made available in DSpace on 2014-12-10T17:25:42Z (GMT). No. of bitstreams: 1 6808204.pdf: 1514287 bytes, checksum: 3091ede42a7d70307d3b38caaf2c99c8 (MD5) Previous issue date: 1967
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The Propagation of Flexural Waves in Beams According to The Timoshenko Theory
Made available in DSpace on 2014-12-10T17:25:24Z (GMT). No. of bitstreams: 1 6408363.pdf: 2855591 bytes, checksum: be67e78a074f873db64dea7bedde9d4a (MD5) Previous issue date: 1964
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Sensor arrays for the measurement of dispersive, flexural waves in structures for signal-to-noise ratio enhancement and angle of arrival determination
… are considered with applications to dispersive flexural waves where the propagation velocity is not constant but dependent on frequency. The theory is validated through experiments with harmonic and broad band applications. The test apparatus consisted of a long thin beam with anechoic …
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Multiscale determination of in situ stress and fracture properties in reservoirs
… as "breakouts," and the dispersions of polarized flexural waves which propagate along the borehole. Traditionally these data are analyzed to derive stress orientations but not magnitudes. To determine the magnitude of stresses directly from breakouts, we use an iterative elastic modeling of …
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Nonlinear dynamics of three-dimensional solitary waves
… at non-zero wavenumber, kmin. Examples include waves on the surface of a liquid in the presence of both gravity and surface tension, flexural waves on a floating ice sheet, in which case capillarity is replaced by the flexural rigidity of the ice, and internal gravity waves in layered flows in …
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The ocean tide and waves beneath the Ross ice shelf, Antarctica
… effects of the ice shelf and sea floor. Waves having periods shorter than 20 min were observed in the ice shelf. These have been identified as flexural waves that are generated by the action of the ocean swell on the northern edge of the shelf. The observed speed of these waves was …
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Simultaneous active passive/control of extensional and flexural power flows in infinite thin beams
… to simultaneously attenuate extensional and flexural power flows in infinite thin beams and determine the advantages and disadvantages of such a combination. An analytical model is developed for an infinite beam with a passive insert of high damping placed at some distance from a point force …
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Observation and inversion of seismo-acoustic waves in a complex Artic ice environment
The propagation of low frequency seismo-acoustic waves in the Arctic Ocean ice canopy is examined through the analysis of hydrophone and geophone data sets collected in 1987 at an ice camp designated PRUDEX in the Beaufort Sea. Study of the geophone time series generated by under-ice explosive …
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Control of Radiated Noise from Fluid-Loaded Stiffened Structures
… these structures, so called Bloch-Floquet (BF) waves are generated due to the interaction between flexural waves in the host structure and flexural/torsional waves in the stiffeners. These waves are a primary source of undesirable noise and vibrations when a stiffened structure is excited by a …
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On the application of finite element analysis to wave motion in one-dimensional waveguides
… dispersion curves for freely propagating flexural waves, including attenuating waves, are presented. Complicated phenomena such as curve veering, non-zero cut-on phenomena and bifurcations are observed as results of wave coupling in the wave domain. A method of decomposition of the power …
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Dynamic Response of Linear/Nonlinear Laminated Structures Containing Piezoelectric Laminas
… observations. The code is then used to study flexural waves generated by PZT actuators and propagating through a cantilever beam both with and without a defect in it. The computed results are compared with test observations and with the published results for the linear elastic beam. The …
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Damping of Vibration Using Periodically Voided Viscoelastic Metamaterials
… previously to improve the damping of vibrational waves and acoustic waves through wave scattering and wave reflection at periodic impedance changes. Impedance changes can occur at both material boundaries and geometric changes of the medium. Impedance changes cause wave scattering, wave …
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Fundamental Studies In the Lamb-Wave Interaction Between Piezoelectric Wafer Active Sensor and Host Structure During Structural Health Monitoring
… the structure by exciting and receiving Lamb waves propagating in the structure or by passively listen to changes in the structure. PWAS-structure interaction modeling is fundamental in order to achieve single mode excitation, i.e., tuning, a requirement for most of the SHM algorithms (time …
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A study on the behaviour of guided wave propagation in utility timber poles
… the condition assessment of timber poles. Waves propagating along a pile/pole include different clusters of waves, called guided waves (GWs). In GW, the velocities of a wave (such as phase velocity, group velocity, energy velocity) become a function of frequencies (i.e. wave dispersion …