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 “"Modal interaction"”.
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Nonlinear Vibrations of Metallic and Composite Structures
… are made. In all the studies there is an interaction between the theoretical and experimental work that lead to important results. In the first study, previous theoretical results for the single-mode response of a parametrically excited cantilever beam are validated. Of special interest is …
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Nonlinear vibration of beam and multibeam systems
… internal resonance and a nonresonant modal interaction were observed to transfer energy to a low-frequency mode. The subcombination internal resonance consisted of contributions from the directly excited fourth mode, the fifth mode, and the low-frequency second mode. The response due …
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Estabilidade local de painéis cilíndricos enrijecidos
… to stiffeners spacing and slenderness as well as modal interaction and inicial geometric imperfections are investigated. It is shown that the use of slender stiffeners as suggested by the orthotropic theory, can lead to interaction between local and overall modes resulting in primary bifurcation …
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Minimum-weight design of compressively loaded stiffened panels for postbuckling response
… by accounting for postbuckling strength and modal interaction. The effect of laminate stacking sequence is also investigated. The current design procedure requires the stacking sequence to be prescribed, proving to be a limitation in the design procedure.
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Towards a Unified Framework for Smart Built Environment Design: An Architectural Perspective
… physical objects. These objects offer primitive interactions, basic use cases and direct affordances. As a result, the traditional architectural process is completely focused on two dimensions of design, i.e., the physical environment based on context and functional requirements based on the …
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Co-Operation, Perception, and Understanding in an L2 Classroom for the Visually Impaired
… of co-operative action to investigate the multi-modality of an EFL classroom where both the learners and their teacher are blind. I focus on evidence for both the role of the nonvisual senses, in particular, sound and touch, and the achievement of understanding during classroom tasks. I conducted …
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Broadband Piezoelectric Energy Harvesting and Vibration Suppression Using Nonlinear Mechanisms
… be tuned to a near 2:1 ratio. Double jumping, modal interaction, and saturation phenomena are revealed experimentally and numerically. A theoretical study based on two approximate methods is also conducted to gain insights into the key features of internal resonance and the benefits for energy …
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Spatiotemporal Neural Dynamics of Audiovisual Perception and Cross-modal Mental Imagery
… audiovisual events and recalls them by cross-modal information. First, we characterized where and when different levels of stimulus information are processed in the brain. Our results reveal early asymmetrical cross-modal interaction, with acoustic information represented in both early visual …
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Nonlinear Vibrations of Doubly Curved Cross-PLy Shallow Shells
… of layers on the shell parameters is shown. Modal interaction between the first and second modes in the case of a two-to-one internal resonance is investigated. We use the method of multiple scales to determine the modulation equations that govern the slow dynamics of the response. A …
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Random Vibration Analysis of Higher-Order Nonlinear Beams and Composite Plates with Applications of ARMA Models
In this work, the random vibration of higher-order nonlinear beams and composite plates subjected to stochastic loading is studied. The fourth-order nonlinear beam equation is examined to study the effect of rotary inertia and shear deformation on the root mean square values of displacement …
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Modelling and Prediction of the Effects of Dynamic Responses of Tall Buildings on an Elevator System
… suspension and compensating ropes can generate modal interaction between the elevator car, compensating sheave, and counterweight. Thus, the displacements of the elevator car, compensating sheave, and counterweight can be predicted.
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Modeling, Simulation, and Analysis of Micromechanical Filters Coupled with Capacitive Transducers
The first objective of this Dissertation is to present a methodology to calculate analytically the mode shapes and corresponding natural frequencies and determine critical buckling loads of mechanically coupled microbeam resonators with a focus on micromechanical filters. The second objective is to …