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 12 of 12 for “"damping terms"”.
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On models of Kirchhoff Equations with damping terms: existence results and asymptotic behaviour of solutions
The abstract will be viewed from the PDF to distortion Mathematical Formulas.
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Modeling of power system dynamics in the medium time scale
… power system stabilizer design that captures the damping due to the amortisseur windings while retaining the simplicity of the DeMello-Concordia model is presented. Second, time scales of the regulated synchronous machine are analyzed using the linearized models, and the well-known effects of the …
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Optimal control of wave-induced vibrations in semisubmersible structures with flexible superstructures
… on the motion itself. The added mass and damping terms stemming from this motion depend on the frequency of motion. It is well known that for a given wave height, the wave energy is distributed according to a Rayleigh distribution. Because mass and damping terms vary with the frequency of …
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Stochastic hypodissipative hydrodynamic equations: well-posedness, stationary solutions and ergodicity
… equations and Euler equations with positive damping terms on both the torus T<sup>*2*</sup> and the whole space ℝ<sup>*2*</sup>. We first show the existence of (H<sup>*1*</sup> -valued) martingale solutions for both the 2D anisotropic Navier–Stokes equations and Euler equations. Then we prove …
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Transfer matrix analysis of an electrohydraulically driven rotary- vibratory drilling system
… stiffness, internal material, and external fluid damping. These properties were introduced through a new continuum transfer matrix for a damped pipe element. The model allows for the inclusion of realistic geometrical representations for the drill string, and the inclusion of masses, springs, …
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Untangling energy dependent radiation damping and chemical interface damping in gold nanorods
… practical applications. Specifically, radiation damping and chemical interface damping are crucial in plasmonic sensing and plasmon-enhanced optoelectronics. However, in systems where it is desirable to study both radiation and chemical interface damping, these terms can become entangled due to …
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Robust Observers And Controllers For Marine Surface Vessels Undergoing Maneuvering And Course-Keeping Tasks
… for the coriolis and centripetal acceleration terms, added mass and wave damping terms, wave excitation forces, so-called "memory" effect terms, nonlinear restoring forces, wind and current effects, and control forces and moments. In addition, the formulation accounts for the physical …
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Nonlinear optical properties of chiral media.
… of molecules to electromagnetic fields in terms of molecular electric-dipole polarizabilities. The inclusion of phenomenological damping in the sum-overstates expressions for the nonlinear polarizabilities is discussed, both at optical frequencies and in the limit that one or more applied …
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Modeling Cable Harness Effects on Space Structures
… identifying natural frequencies and damping values of spaceflight cables before and after the bakeout process. After bakeout, spaceflight cables showed reduced natural frequencies and increased damping, so a bakeout correction factor is recommended for bending stiffness calculations. …
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Global in time existence of Sobolev solutions to semi-linear damped sigma-evolution equations in L^q scales
The main goal of this thesis is to prove the global (in time) existence of small data Sobolev solutions to semi-linear damped σ-evolution equations from suitable function spaces basing on L^q spaces by mixing additional L^m regularity for the data on the basis of L^q-L^q estimates for solutions, …
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Computational modeling and simulation of nonlinear electromagnetic and multiphysics problems
… by introducing auxiliary variables and damping terms into the original Maxwell's equations, which result in artificial propagation and dissipation of the numerical errors. Based on the DGTD method, dynamic h- and p-adaptation algorithms are developed for a full-wave analysis of …
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Computer-aided design of tension structures
… cables, etc., and (b) the use of a 'kinetic' damping procedure which permits gross changes in support geometries to be made during interactive form-finding without the possibility of numerical instability. Although the main surface spanning elements may be purely tensile, many tension …