Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 101 for “"linear theory"”.
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Water Wave Refraction with Non-Linear Theory
… the present study using Stokes' third order wave theory. One type of model is utilized in a parametric study employing several different topographies. Wave trajectories obtained from this model, when obtained by using first and third order wave theory with and without the consideration of energy …
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A Complementary Linear Theory of Plasticity for Plane Strain
Made available in DSpace on 2014-12-10T17:25:34Z (GMT). No. of bitstreams: 1 6604157.pdf: 1646603 bytes, checksum: 2da31d1f6c3e15e50dd4f5a84451236f (MD5) Previous issue date: 1965
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Linear theory of radiation from large space structures with induced AC current
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.
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Non-linear corrections to the linear theory for the prediction of the cavitating flow around hydrofoils
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1985.
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Nonlinear axial stiffness characteristics of axisymmetric bolted joints
A critical assessment of the current design theory for bolted joints which is based on a linear, one-dimensional stiffness analysis is presented. A detailed nonlinear finite element analysis of a bolted joint conforming to ANSI standards was performed. The finite element results arc presented in …
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The Loss in Solid Poles of Synchronous Machines On Load
… loss, which may be accurately calculated by a linear theory if the steady field strength is greater than the alternating field strength. Otherwise a non-linear theory which allows for unsymmetrical hysteresis loops is required for strong alternating fields, and a limiting non-linear theory is …
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Computation Of Acoustic Ressure Fields Produced In Feline Brain By High-Intensity Focused Ultrasound
… exposures by estimating them using nonlinear rather than linear theory. In our current project, the acoustic pressure waveforms produced in the brains of anesthetized felines were numerically simulated for a spherically focused, nominally f1-transducer (focal length = 13 cm) at …
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Shear Effects on Buoyancy-Generated Turbulence and Salt Fingers
Linear theory and laboratory experiments on a finger-favorable gravity current are applied to study turbulence in a salt finger favorable flow. The theory reproduces well previous observations for unsheared flow, and it predicts that heat can be transported more efficiently than salt, even in salt …
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Design and Analysis of a Novel Wave Energy Converter With a Tension Leg Platform and Oscillating Proof Masses
… mechanism. First a model of the system with a linear restoring force exerted on the proof mass is analyzed using linear theory. Following the development of the linear theory, a more complex model with a nonlinear restoring force was considered. Using both a frequency-domain approach and a …
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Dinâmica de estruturas prismáticas laminares - consideração de cargas móveis
… makes use of Hamilton's principle and the linear theory of thin plates. Associated with the Fourier series, the finite element method is used to discretize the spatial variables. The resulting system of ordinary differential equations is integrated by means of Newmark's method. Some example …
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Study of directional ocean wavefield evolution and rogue wave occurrence using large-scale phase-resolved nonlinear simulations
… complex dynamic processes involved, including nonlinear wave interaction, wave breaking and wind forcing, and also wave interactions with currents and bottom bathymetry. With fast computational algorithms for nonlinear phase-resolved wave simulations and modern computational capabilities, we now …
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Crossflow stability and transition experiments in a swept-wing flow
… data are compared to predictions from linear stability theory. Comparison of measured and predicted pressure distributions shows that a good approximation of infinite swept-wing flow is achieved. A fixed-wavelength vortex pattern is observed throughout the visualization range. The …
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ΠΡΟΒΛΗΜΑΤΑ ΤΗΣ ΓΕΝΙΚΕΥΜΕΝΗΣ ΘΕΡΜΟΕΛΑΣΤΙΚΟΤΗΤΑΣ ΚΑΙ ΕΠΕΚΤΑΣΗ ΤΗΣ ΣΤΑ ΣΙΔΗΡΟΜΑΓΝΗΤΙΚΑ ΥΛΙΚΑ
… (I) A COMPARATIVE STUDY OF THE COUPLED BIOT'S THEORY OF THERMOELASTICITY IS PRESENTED AS WELL AS OF THE GENERALIZED THEORIES OF LORD AND SHULMAN, LEBON AND GREEN AND LINDSAY. ALSO THE PROBLEM OF THE PROPAGATION OF THERMOELASTIC WAVES IN AN INFINITE CYLINDER IS STUDIED. (II) THE FIELD EQUATIONS …
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Behavior of Skewed Continuous I Beam Bridge Structures
… The finite element method based on the linear theory of elasticity is used in this study. The loads assumed are those corresponding to the HS20-44 traffic loadings. Only two-span bridges with two traffic lanes are studied. The effects of the parameters related to the geometry of the …
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Response of Venice storm gates to incident waves
… hinged at the bottom. In the present work a linear theory is developed first to study the motions of the gates forced by a monochromatic incident wave. The gates are assumed to be vertical and the fluid domain is approximated to a channel of infinite length on the Adriatic side and to a semi …
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Resistance and wake prediction for early stage ship design
… The wave drag is calculated using a modified linear theory, thus eliminating the need to run fully three-dimensional free surface CFD codes. The tool developed is validated against published Series 60 test data.
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On a generalized laminate theory with application to bending, vibration, and delamination buckling in composite laminates
… obtained by using the Generalized Laminate Plate Theory of Reddy in which layer-wise linear approximation of the displacements through the thickness is used. Analytical, as well as finite-element solutions of the theory, are developed for bending and vibrations of laminated composite plates for …
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Model for the onset of nonlinear flow dissipation in 2D superfluid helium films
A model for the onset of nonlinear dissipation in AC and DC flows is presented as an extension of the linear theory of Ambegaokar, Halperin, Nelson, and Siggia to include to flow velocity. The renormalization group calculation is carried out on a computer to determine the dissipation as a function …
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An investigation of the principles and practices of seismic isolation in bridge structures
… isolation bearings, and a presentation of the linear theory of seismic isolation. The qualitative investigation of seismic isolation systems is supplemented by a quantitative nonlinear time-history analysis that illustrates the response of a simple span bridge to seismic excitation. The …
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