Parcourir par sujet "Vibrations (mechanical)"
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Actions on a railway track, due to an isolated defect
(2014)The rail running table imposes to the vehicle a forced vibration. It is not smooth but instead it comprises a lot of faults that give to the rail running table a random surface. Furthermore under the primary suspension ... -
The effect of railway local irregularities on ground vibration
(2015)The environmental effects of ground-borne vibrations generated due to localised railway defects is a growing concern in urban areas. Frequency domain modelling approaches are well suited for predicting vibration levels on ... -
Effect of vibrational degrees of freedom on the heat transfer in polyatomic gases confined between parallel plates
(2016)Conductive stationary heat transfer through rarefied nonpolar polyatomic gases, confined between parallel plates maintained at different temperatures, is investigated. It is assumed that gas molecules possess both rotational ... -
Efficiency of vibration mitigation measures (floating slabs) at the latest extensions on lines 2 and 3 of the Athens Metro
(2015)This paper describes the in situ evaluation of anti vibration mitigation measures introduced in the latest two extensions on lines 2 and 3 of the Athens Metro: (a) extension of line 3 from Aigaleo to Haidari and (b) extension ... -
A hybrid two-step approach for evaluating the impact of local rail defect on building vibration
(2017)With the development of light rail transit in urban areas, the effect of railway vibrations on buildings and people inside buildings is a growing problem. In particular, urban transit commonly generates large vibration ... -
Modelling the singular rail and wheel surface defect for predicting railway ground vibration
(2015)When undertaking a railway vibration assessment, the presence of singular defects on the rail and wheel surfaces significantly affects the ground vibration level. The objective of this paper is to analyse the most common ... -
Nonlinear gear transmission system numerical dynamic analysis and experimental validation
(2014)The main objective of the present work was to accurately predict the dynamic response of a gear transmission system. First, a nonlinear mathematical model is introduced. In this model, the housing of the gearbox is modeled ... -
Online damage detection in plates via vibration measurements
(2015)In this work, we propose a new framework for the online detection of damage in plates via vibration measurements. To this end, a finite element model of the plate is handled by a recursive Bayesian filter for simultaneous ... -
Pareto optimal structural models and predictions consistent with data and modal residuals
(2008)A multi-objective identification method for model updating based on modal residuals is proposed. The method results in multiple Pareto optimal structural models that are consistent with the measured modal data, the class ... -
"Quiet tram track" infrastructure solutions at Athens tramway network for squealing noise attenuation
(2009)The "Quiet City Transport" (QCity) project (6th FRAMEWORK PROGRAMME: SUSTAINABLE SURFACE TRANSPORT - EU Project FP6-516420, Contract No TIP4-CT-2005-516420, 2005") aims to develop an integrated technology infrastructure ... -
Railway ground vibrations induced by wheel and rail singular defects
(2015)Railway local irregularities are a growing source of ground-borne vibration and can cause negative environmental impacts, particularly in urban areas. Therefore, this paper analyses the effect of railway track singular ... -
Railway-induced ground vibrations in the presence of local track irregularities and wheel flats
(2015)Rapid growth in railway infrastructure has led to numerous environmental technical challenges. This includes ground-borne vibration, which is becoming an increasing problem, particularly in urban environments. A common ... -
Structural health monitoring and fatigue damage estimation using vibration measurements and finite element model updating
(2019)In this work, a computational framework is proposed for fatigue damage estimation in structural systems by integrating operational experimental measurements in a high-fidelity, large-scale finite element model. The proposed ... -
Vibrations from rail traffic and mitigations measures for the reduction of railway noise
(2015)The present paper presents an analysis of the mechanism of propagation of vibrations from rail traffic and its effects to the surrounding land uses. First, the following issues are examined: levels of noise from rail traffic ...