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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 15 of 15 for “"Mechanical Damping"”.
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An Extension of a Theory of Mechanical Damping Due to Dislocations
Made available in DSpace on 2014-12-10T17:57:46Z (GMT). No. of bitstreams: 1 6612439.pdf: 2771676 bytes, checksum: 01fe339aff2b597a726612ff3546d313 (MD5) Previous issue date: 1966
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Design, Modelling, and Test of an Electromagnetic Speed Bump Energy Harvester
… varying the system parameters such as electrical damping, mechanical damping, velocity and weight of the vehicles. Overall, system is able to increase the overall energy density by using Mechanical Motion Rectification (MMR) technology which would allow the increase in the power generation almost …
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Design of effective traveling wave sloshing absorbers for structural control
… the hen’s egg possesses the properties of high mechanical damping. The possible employment of the hen’s egg as a sloshing absorber is investigated. Great potential is seen in this naturally occurring geometry.
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Modeling and design of a MEMS piezoelectric vibration energy harvester
… Coupled with a dissipative system model and a mechanical damping investigation, a new scale-dependent operating frequency selection scheme is presented. Coupled electromechanical structural models are developed, based on the linear piezoelectric constitutive description, to predict uni-morph …
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ADDITIVELY MANUFACTURED METALLIC CELLULAR STRUCTURES
… are lightweight structures with excellent mechanical, thermal, and acoustic properties. They offer promise in a series of applications, including lightweight applications, sandwich cores, mechanical damping, acoustic absorption, strain isolation, and thermal management. The manufacturing of …
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Enforcing nonclassicality in medium-scale quantum systems
… measures of macroscopicity are reviewed. An optomechanical system is described which enables us to study nonclassicality in macroscopic mechanical oscillators. We analyse the impact of different measurement settings on the macroscopicity of the mirror and the Wigner functions of the mechanical …
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The chemical structure and mechanical properties of phenolic resins and related polymers
… of the resin structure in terms of thermomechanical properties. The number of crosslinks in the system was controlled using resins based on phenol and para-cresol formulations. Intramolecular hydrogen bonding effects were examined using substituted resins and a synthetically derived phenol …
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Nanotube reinforced thermoplastic polymer matrix composites
… in two separate studies aimed at improving mechanical properties with single wall nanotube (SWNT) reinforced thermoplastic polymer composites. The two studies demonstrate the effect of solid freeform fabrication (SFF) and chemical functionalization on anisotropy and limited reactivity, …
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Optomechanical Devices and Sensors Based on Plasmonic Metamaterial Absorbers
… comparing to a uniform gold film. In an optomechanical device, the optical mode and mechanical mode are mutually influenced, through the optical forces exerted on the mechanical oscillator and the detuning of optical resonance by the mechanical oscillator, so that the mechanical oscillations …
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Nonlinear stochastic vibration analysis for energy harvesting and other applications
… system. This power is split between undesirable mechanical damping and useful electrical dissipation, where the form of the stiffness profile and device parameters determine the relative proportion of energy dissipated by each mechanism. An upper bound on the electrical power is derived and used …
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Parametric dependencies of aeroengine flutter for flutter clearance applications
… We introduce a new parameter, termed the reduced damping, g/p *, which collapses the combined effects of mechanical damping and mass ratio (blade mass to fluid inertia). Furthermore, the introduction of the compressible reduced frequency, K*, makes it possible to uniquely separate the corrected …
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Control of large-scale structures with large uncertainties
… the application of semi-active and active damping systems, such as large modeling uncertainties that are inherent to large-scale structures, limited state measurements, lack of mechanically reliable control devices, large power requirements, and the need for robust controllers. In order to …
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Electromechanical Modeling of Piezoelectric Energy Harvesters
… This work presents distributed-parameter electromechanical models that can accurately predict the coupled dynamics of piezoelectric energy harvesters. First the issues in the existing models are addressed and the lumped-parameter electromechanical formulation is corrected by introducing a …
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Modeling and Synthesis of a Piezoelectric Ceramic-Reinforced Metal Matrix Composite
… method that can predict the elastic modulus and damping capability in the form of Joule heat for any piezoelectric ceramic-reinforced metal matrix composite system. Specifically, barium titanate (BaTiO₃), lead titanate (PbTiO₃), and zinc oxide (ZnO) piezoelectric ceramics have been modeled as …
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Magneto-mechanical systems for ultra-low frequency data transmission: Dynamics, losses, and driving mechanisms
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-12-01