Studies concerning the optimization of the modal analysis of the Bechtel’s viaducts – calculus of natural frequencies and eigenvalues
Journal Title: Romanian Journal of Acoustics and Vibration - Year 2011, Vol 8, Issue 1
Abstract
This paper proposes an approach of the experimental study of the dynamics of a reinforced concrete bridge made by a number of twenty U beams and beared by eighty identically neoprene supports (four bearings for each concrete beam). The experiments were made in site on Transylvania highway, on the viaduct situated on km 29+602,75 - km 29+801,25 by the specialists from Vibration and Acoustic Laboratory of the Research Institute for Construction Equipment and Technology - ICECON S.A. Bucharest with the help of the Research Center of Machines, Mechanic and Technological Equipments – MECMET from Dunarea de Jos University of Galati. The vibrations of the bridge were caused by passing with different speeds of a forty tons truck over an obstacle mounted on the bridge surface. The experimental data were acquainted on three channels (accelerations on the axis x, y and z) by a four channel data acquisition interface from National Instrument (NI 9233) through the USB port of a PC workstation. The experimental data were processed by a adequate calculus programme developed on ICECON S.A. Bucharest on the basis of LabView® ver. 8.5 from National Instruments.
Authors and Affiliations
Leonidas Sakalauskas, Nicuşor Drăgan, Ovidiu Vasile
Keywords
Related Articles
- EP ID EP113863
- DOI -
- Views 62
- Downloads 0
Vibrations of the Elliptical Gears
In the paper we analyze the elliptical gears from the kinematic, dynamic, and of the inlaid torsional vibrations points of view. We study the uni-lobe and bi-lobe elliptical gears. To be out to determine the mechanical p...
Tubewave - Interactive Software Dedicated to Guided Waves in Tubes
The guided ultrasonic waves have become interesting alternatives to classical pulse-echo nondestructive testing in industrial piping systems. These guided waves have the capability to travel for several meters along pipe...
Numerical Simulation of Real Contact Between Two Bodies
This paper presents the effects appearing inside a beam from a overpass of Arad-Timisoara highway due to impact with a high dumper of a moving vehicle. For this analysis it is developed a simplified calculation and a num...
On Nonlinear Dynamics of Dragline Bucket Subjected to Flexible Linkages
In this paper, the oscillatory motion of the dragline loaded bucket it was highlighted. Hence, the authors proposed a new computational model useful for study of the nonlinear dynamics of the bucket. The linkage of the b...
Practical Considerations of the Matrix Method Formalism
The work uses the assumption that the solution to problems of elastic wave propagation in multilayered media, in which each layer is homogeneous and where the ensemble of layers has physical properties that vary only wit...