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Book
Concrete structures under impact and impulsive loading : synthesis report
Year: 1988 Publisher: Lausanne Comité euro-international du beton,

Ambient vibration monitoring
Authors: ---
ISBN: 0470024305 9780470024300 Year: 2005 Publisher: Chichester Wiley

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Abstract

In-operation vibration monitoring for complex mechanical structures and rotating machines is of key importance in many industrial areas such as aeronautics (wings and other structures subject to strength), automobile (gearbox mounting with a sports car body), rail transportation, power engineering (rotating machines, core and pipes of nuclear power plants), and civil engineering (large buildings subject to hurricanes or earthquakes, bridges, dams, offshore structures). Tools for the detection and the diagnosis of small changes in vibratory characteristics are particularly useful to set up a preventive maintenance policy based on the actual evolution of the state of the monitored machine or structure, as opposed to systematic a priori planning. Ambient Vibration Monitoring is the backbone of such structural assessment monitoring and control. It provides the possibility to gain useful data under ambient conditions for the assessment of structures and components. Written by a widely respected authority in this area, Ambient Vibration Monitoring describes the current practice of ambient vibration methodologies illustrated by a number of practical examples._ Designed to aid the practical engineer with their understanding of the topic, it is the culmination of many years of practical research and includes numerous & real world' examples._ It also provides information on applicable solutions. This book will enable not only_practitioners (in civil, mechanical and aerospace engineering), but also researchers and students,_to learn more about the theory and practical applications of this subject.


Book
De problematiek van geluid en trillingen bij spoorbaanconstructies in een stedelijke omgeving.
Year: 1997 Publisher: Leuven KUL. Departement bouwkunde,


Book
Structural vibration analysis : modelling, analysis and damping of vibrating structures.
Authors: --- ---
ISBN: 0853125791 Year: 1983 Publisher: Chichester Horwood,


Book
Partial loading on orthotropic plates.
Authors: ---
ISBN: 0721011039 Year: 1978 Publisher: Slough Cement and concrete association,


Book
Numerical modelling of subway induced vibrations
Authors: ---
ISBN: 9789056829841 Year: 2008 Publisher: Leuven Katholieke Universiteit Leuven

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Abstract

Vibrations induced by the passage of underground trains are a major environmental concern in urban areas. These vibrations propagate through the tunnel and surrounding soil into nearby buildings causing annoyance to people. Vibrations may also interfere with sensitive equipment, as used in scientific research laboratories and hightech industries. The present study aims to develop a numerical model for prediction of vibrations from underground railways. A coupled periodic FE-BE model that fully accounts for the dynamic interaction between the train, the track, the tunnel and the soil has been developed. The three-dimensional dynamic track-tunnel-soil interaction problem is solved with a subdomain formulation, using a finite element method for the track and the tunnel and a boundary element method for the soil. The periodicity of the track-tunnel-soil system in the longitudinal direction is exploited using the Floquet transformation. The track-tunnel-soil interaction problem is solved in the frequency-wavenumber domain and the wave field radiated into the soil is computed. The mathematical correctness of the coupled periodic FE-BE approach is demonstrated by verifying the method against a semi-analytical pipe-in-pipe model. The coupled FE-BE model has also been validated by means of several experiments that have been performed at the Cité Universitaire on the line RER B of RATP in Paris and in Regent's Park above the Bakerloo line tunnels of London Underground. Despite the large amount of uncertainties present in the problem, a reasonably good agreement is obtained between the predictions and measurements. The coupled periodic FE-BE model and the pipe-in-pipe model are used to perform a parametric study to elucidate the importance of determining factors for subway induced vibrations. A number of parameters related to the vehicle, the track, the tunnel and the soil are investigated. The parametric study has improved the understanding of the generation and propagation mechanisms of vibrations from underground railways. The coupled periodic FE-BE model has also been used to model the vibrations from a high speed train running in a tunnel, demonstrating the applicability of the state-of-the-art model to solve complex engineering problems of vibrations from underground railways. The parametric study has improved the understanding of the generation and propagation mechanisms of vibrations from underground railways. The coupled periodic FE-BE model has also been used to model the vibrations from a high speed train running in a tunnel, demonstrating the applicability of the state-of-the-art model to solve complex engineering problems of vibrations from underground railways.

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