Browsing by Publisher "National Technical University of Athens"
Now showing items 1-11 of 11
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CLASSIFICATION OF WALL DEFECTS FOR MAINTENANCE PURPOSES USING IMAGE PROCESSING
( National Technical University of Athens , 2023 , Conference)Stakeholders are increasingly interested in finding efficient methods for regularly surveying and reporting on the state of their building assets, focusing on accuracy, consistency, and ease of use. High-rise buildings can ... -
Energy harvesting from railway vibrations - A numerical study based on beam-on-elastic-foundation under quasi-static loading
( National Technical University of Athens , 2021 , Conference)The objective of this paper is to investigate energy harvesting of train-induced rail vibrations and to provide a comparison between various feasible harvesting locations based on the expected electrical power output. ... -
Ground-borne vibrations due to railway traffic in urbanized areas: A numerical study about traffic in trench cross-sections
( National Technical University of Athens , 2017 , Conference)Modern cities require efficient mass transportation systems like subway and railway networks. Due to the lack of available space and also due to environmental concerns, it is usually preferable to use the underground space ... -
Investigating the behavior of railroad ballast in a box test under sinusoidal & simulated train loading
( National Technical University of Athens , 2019 , Conference)The use of railway transportation systems has been increased throughout the years. Conventional ballasted tracks have been widely used in many countries around the world. Ballast material is the basic element in ballasted ... -
INVESTIGATING THE IMPACT OF POROSITY DISTRIBUTION AND GRADING PARAMETER ON THE FREE VIBRATION OF FUNCTIONALLY GRADED BEAMS
( National Technical University of Athens , 2023 , Conference)This study focuses on investigating the free vibration of porous functionally graded (FG) beams and the impact of porosity distribution on the properties and performance of materials. To achieve this, the study assumes ... -
A mixed space-time and wavenumber domain model for predicting ground vibration from railway tracks
( National Technical University of Athens , 2015 , Conference)In this paper, a mixed model for studying ground vibration generated from surface railway tracks is presented. A ballasted track with nonlinear resilient components is modelled in the time domain using the Finite Element ... -
MODAL CHARACTERIZATION AND ROAD ROUGHNESS RECONSTRUCTION USING DYNAMIC VEHICLE ACCELERATIONS AND ANNS
( National Technical University of Athens , 2023 , Conference)Road networks are considered huge and critical infrastructures that support the development and growth of societies. These infrastructures deteriorate over time due to regular usage and/or external environmental factors. ... -
Numerical study on the damping characteristics of a shock absorber valve utilizing different velocities through CFD analysis
( National Technical University of Athens , 2021 , Conference)Shock absorbers or hydraulic dampers are power dissipating devices. The fluid flow inside the damper is governed by predefined passages. The damping effect is accomplished by the resistance of oil to flow through the ... -
Prediction of the eigenperiods of MDOF shear buildings using neural networks
( National Technical University of Athens , 2021 , Conference)The study of multi-degree of freedom (MDOF) systems is essential to evaluate and understand the seismic response of buildings. Through a MDOF idealization, the dynamic properties of the building such as its natural frequencies ... -
SYNTHETIC DATA GENERATION FOR THE CREATION OF BRIDGE DIGITAL TWINS WHAT-IF SCENARIOS
( National Technical University of Athens , 2023 , Conference)The Digital Twin (DT) concept, as understood nowadays, appeared in the early 2000s as an attempt to create virtual replicas of physical assets, such as bridges, that can be used to examine, monitor and manage their ... -
UNCERTAINTIES IN THE SYNTHETIC DATA GENERATION FOR THE CREATION OF BRIDGE DIGITAL TWINS
( National Technical University of Athens , 2023 , Conference)Digital twins (DTs) are virtual replicas of physical assets that can be used to monitor and manage their performance. To date, the DT concept has been effectively implemented in various industries, including aeronautics, ...
