Search results for " Ferro"

The environmental impact of noise from roads and highways traffic is relevant in urban and rural areas. The use of open-graded asphalt pavements reduces significantly the noise, entrapping the acoustic waves inside the porous structure of the material. In this paper we propose a simulation approach in order to predict the acoustic properties of the asphalt mixture from geometrical and topological indicators. In detail we have generated, using a Random Sequential Adsorption model, synthetic samples starting from the same grading and bitumen contents of real samples manufactured in laboratory. We have measured the acoustic adsorption coefficient of the real samples and we have investigated th…

open graded asphalt mixture tire/pavement noise absorption coefficient random sequential adsorption noise reductionSettore ICAR/04 - Strade Ferrovie Ed Aeroporti

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Assessing the Open Trenches in Screening Railway Ground-Borne Vibrations by Means of Artificial Neural Network

2009

Reducing ground borne vibrations in urban areas is a very challenging task in railway transportation. Many mitigation measures can be considered and applied; among these open trenches are very effective. This paper deals with the study of the effect, in terms of reduction of vertical and horizontal displacements and velocities, of the open trenches. 2D FEM simulations have been performed and several open trench configurations have been analysed varying the main geometric features such as width and depth, distance from the rail, thickness of the soil layer over the rigid bedrock, type of the ground, ratio between the depth of the trench, and the thickness of the soil layer. For quantifying t…

open trencheEngineeringgeographygeography.geographical_feature_categoryAcoustics and UltrasonicsArtificial neural networkArticle Subjectbusiness.industryBedrockRailwaylcsh:QC221-246Railway transportationground-borne vibrationBuilding and ConstructionStructural engineeringVibrationMechanics of MaterialsTrenchlcsh:Acoustics. SoundSettore ICAR/04 - Strade Ferrovie Ed AeroportiGeotechnical engineeringbusinessReduction (mathematics)artificial neural networkFem simulationsAdvances in Acoustics and Vibration

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