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 147 for “"single-degree-of-freedom"”.
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Stochastic response of single degree of freedom hysteretic oscillators
During strong ground shaking structures often become inelastic and respond hysteretically. Therefore, in this study some hysteretic models commonly used in seismic structural analysis are studied. In particular the characteristics of a popular endochronic model proposed by Bouc and Wen are examined …
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Single-degree-of-freedom energy harvesters by stochastic excitation
… criteria for the objective comparison of different classes of single-degree-of-freedom oscillators under stochastic excitation are developed. For each family of oscillators, these objective criteria take into account the maximum possible energy harvested for a given response level, …
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Single Degree of Freedom Solid Rotor Velocity Control Induction Drive
This thesis studies a single degree of freedom (DOF), two-pole, three-phase, solid rotor, induction motor operating in closed loop angular velocity control via a proportional-integral (PI) controller applying a constant amplitude, variable frequency drive. The stator consists of six iron teeth, …
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Seismic Displacement Demands on Self-Centering Single-Degree-of-Freedom Systems
… how to estimate the peak seismic displacement of a self-centering system remains a problem for practical design. This thesis addresses this need by presenting a parametric study on the seismic displacement demands of single-degree-of-freedom (SDOF) systems with flag-shaped hysteresis …
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Bandwidth maximization of a single degree of freedom magnetic suspension system
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Nonlinear compensation of a single degree of freedom magnetic suspension system
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Control and design of a single degree-of-freedom magnetic levitation demonstration
… instability. This thesis investigates methods of building and controlling a stable, single degree-of-freedom magnetic suspension system that will be robust to changes in ambient conditions. Synchronous detection is a technique that is successfully implemented in this hardware to create an …
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Errors of a single-degree-of-freedom integrating gyroscope in a vibration environment
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1962.
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Linear and nonlinear compensation techniques for control of a single degree of freedom magnetic bearing
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
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An evaluation of a wheel speed change-gyro-compass utilizing a single-degree-of-freedom gyroscope
Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics. Thesis. 1967. M.S.
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Evaluation of Strength Reduction Factor for Concentrically Braced Frames Based on Nonlinear Single Degree-of-Freedom Systems
<p>Strength Reduction Factor (R-Factor), often referred to as Response Modification Factor, is commonly used in the design of lateral force resisting systems under seismic loading. R-Factors allow for a reduction in design base shear demands, leading to more economical designs. The reduction of …
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Identification and Quantification of Nonlinear Behavior in a Disbonded Aluminum Honeycomb Panel using Single Degree-of-Freedom Models
<p>There is not a complete understanding of how damage mechanisms in composite materials react to nondestructive testing inputs. A deeper understanding of composite damage mechanisms and their responses to external vibratory excitation is sought using nonlinear modeling of damping and stiffness …
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Effect of Variation of the Systemic Parameters on the Structural Response of Single Degree of Freedom Systems Subjected to Incremental Dynamic Analysis
This thesis presents the results of a study of the effect of variations of systemic parameters on the structural response of single degree of freedom systems subjected to Incremental Dynamic Analysis. The systemic parameters are mass, stiffness, damping, yield strength and geometric stiffness. Each …
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Analysis of various forced oscillation techniques for obtaining dynamic stability derivatives
… derivatives for aircrafts at high angle of attack are described. From the general equations of motion of an aircraft in space, the perturbation equations of motion are derived for applying to a wind tunnel aircraft model. Data Reduction and test procedures for important dynamic tests are …
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Experiments to study seismic drift of reinforced concrete structures
Earthquake-simulation tests of fifteen reinforced concrete single-degree-of-freedom systems were made to provide benchmark data for studying nonlinear drift response. Test variables included strength and initial period of the specimen, and frequency content and intensity of simulated earthquake …
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Prediction of seismic design response spectra using ground characteristics
… normalized response spectra are obtained for single-degree-of-freedom and massless oscillators. The effectiveness of the grouping scheme is examined by studying the variance of response quantities within each group. The implicit parameters of average frequency and significant duration are …
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Análise da estabilidade de métodos de integração passo a passo
… between these two methods, when applied to a single degree of freedom system, is done.
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ΣΕΙΣΜΙΚΗ ΣΥΜΠΕΡΙΦΟΡΑ ΜΟΝΟΒΑΘΜΙΩΝ ΣΥΣΤΗΜΑΤΩΝ ΣΕ ΕΠΑΦΗ
… INVESTIGATION CONCERNS THE SEISMIC RESPONSE OF ADJACENT BUILDINGS IN SERIES, HAVING SIMILAR OR DIFFERENT DYNAMIC CHARACTERISTICS, USING SINGLE-DEGREE-OF-FREEDOM (SDOF) SYSTEMS SUBJECTED TO A BASE MOTION. THE PHASE DIFFERENCE (DUE TO TRAVELLING SEISMIC WAVES) IN THE STARTING TIMES OF …
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Coupled simulation of loading and response of columns under extreme events
… loading depends on the shape and size of columns as well as on the intensity of the blast. Column's geometry - i.e., shape and size - influences the flow field around the column and consequently the flow field determines forces experienced by the column The main objective of this …
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Nonlinear Vibrations of Cantilever Beams and Plates
A study of the nonlinear vibrations of metallic cantilever beams and plates subjected to transverse harmonic excitations is presented. Both experimental and theoretical results are presented. The primary focus is however on the transfer of energy between widely spaced modes via modulation. This …
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