Dynamic Absorber
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Vibration control device for steel tubular towers of Horizontal Axis Wind Turbines
Abstract This paper presents and discusses the design of a vibration control device for a 120 m high steel tubular tower of onshore Horizontal Axis Wind Turbine (HAWT). The tower is modeled using beam (own code), and shell and solid finite elements (via ANSYS). The Dynamic Vibration Absorber (DVA) is designed to be attached to the tower top, aiming to analyz
Lat. Am. j. solids struct.. Publicado em: 10/07/2019
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2. OPTIMIZATION OF DYNAMIC VIBRATION ABSORBERS BASED ON EQUAL-PEAK THEORY
Abstract The present paper proposes a new procedure to determine the optimal parameters of a dynamic vibration absorber (DVA), considering both damped and undamped primary system. The DVA design is formulated as an optimization problem in which the objective function is constructed based on Den Hartog's equal-peak method. The DVA parameters are selected to m
Lat. Am. j. solids struct.. Publicado em: 25/04/2019
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3. Crashworthiness Analysis of S-Shaped Structures Under Axial Impact Loading
Abstract To mitigate shock forces in collision events, thin-walled members are used as energy absorber. In this article, crashworthiness of single-cell and multi-cell S-shaped members with various cross-sections including triangular, square, hexagonal, decagon and circular were investigated under axial dynamic loading using finite element code LS-DYNA. Furth
Lat. Am. j. solids struct.. Publicado em: 2017-06
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4. Experimental vibration analysis for a 3D scaled model of a three-floor steel structure
In this paper we present an experimental study of a three dimensional physical model of a three-floor structure subjected to forced vibrations by imposing displacements in its support. The aim of this work is to analyze the behavior of the building when a dynamic vibration absorber (DVA) is acting. An analytic simplified analysis and a numerical study are de
Lat. Am. j. solids struct.. Publicado em: 2012-10
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5. Proposição, avaliação numérica e experimental de um absorvedor dinâmico de vibrações multimodal / Proposal, Numerical and Experimental Evaluation of a Multimodal Vibration Dynamic Absorber
Dynamic Vibration Absorbers (DVA) have been widely used for passive control of structural vibrations. In their simplest configurations, those devices have their mitigation capacity confined to narrow frequency bands, which limits, to a large extent, their practical effectiveness. In this work, it is proposed a methodology for the optimal design of a multimod
Publicado em: 2009
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6. Modelo estrutural numérico que simula a alocação de absorvedores dinâmicos para redução de ruído acústico emitido por um transformador de potência. / Numerical structural model that simulates the dynamic absorbers position to reduce acoustic noise emitted by a power transformer.
Os transformadores de potência elétrica produzem um elevado nível de ruído que em alguns casos gera desconforto à comunidade vizinha. O presente trabalho desenvolve um modelo estrutural de elementos nitos que, com carregamento adequado, é capaz de reproduzir o deslocamento, medido durante a operação, de um transformador de potência elétrica. Este m
Publicado em: 2008
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7. Contribuição ao estudo dos absorvedores dinâmicos de vibrações não-lineares / A contribution to the study of Nonlinear Vibration Absorbers
In their simplest form, dynamic vibration absorbers (DVAs) are essentially devices of lumped parameters of mass-stiffness-damping that once connected in a given primary structure are capable of absorbing the vibratory energy at the connecting point, providing a reduction of the vibration level. These devices can be used in various configurations and find a n
Publicado em: 2008
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8. VIBRATION CONTROL OF SLENDER TOWERS WITH A PENDULUM ABSORBER / ABSORSOR PENDULAR PARA CONTROLE DE VIBRAÇÕES DE TORRES ESBELTAS
In the present work the performance of a pendulum absorber in the vibration control of tall and slender towers, caused by dynamic loads, such as, environmental loads, is studied in detail. Due to the possibility of large amplitude oscillations, the non-linearity of the pendulum is considered in the modeling of the problem. The main objective of this research
Publicado em: 2006