Modeling of ground-borne vibration from underground railway systems

Download
index.pdf
2007
Sarıgöl, Melih
Show full item record
149
views
68
downloads
Ground-borne vibration from underground rail vehicles is studied analytically. A previously developed model by J.A.Forrest and H.E.M.Hunt is modified to account for different track and vehicle models. The tunnel is modeled as infinite cylindrical shell surrounded by viscoelastic soil. The track is coupled to the tunnel with supports of complex stiffness. The rails, which are modeled as infinite Euler beams, are supported by discrete sleepers with regular spacing, and railpads with complex stiffness. A modified hysteretic damping model for moving loads is applied to soil. Linearized Hertzian contact spring is included between the wheel and the rail. The solution is obtained in frequency domain using random process theory. Effects of improvements in the model are graphically presented to enable comparison with the previously developed model and measurements from literature.
Elevated Railways and Subways.
http://etd.lib.metu.edu.tr/upload/12608723/index.pdf
https://hdl.handle.net/11511/17050
Graduate School of Natural and Applied Sciences, Thesis

Suggestions

Utilization of neural networks for simulation of vehicle induced flow in tunnel systems
Koç, Gencer; Albayrak, Kahraman; Sert, Cüneyt; Department of Mechanical Engineering (2012)
Air velocities induced by underground vehicles in complex metro systems are obtained using artificial neural networks. Complex tunnel shaft-systems with any number of tunnels and shafts and with most of the practically possible geometries encountered in underground structures can be simulated with the proposed method. A single neural network, of type feed-forward back propagation, with a single hidden layer is trained for modelling a single tunnel segment. Train and tunnel parameters that have influence on ...
Dynamic simulation and performance optimization of a car with continuously variable transmission
Güvey, Serkan; Ünlüsoy, Yavuz Samim; Department of Mechanical Engineering (2003)
The continuously variable transmission (CVT), which has been in use in some of the vehicles in the market today, presents the possibility of decoupling the engine speed and the vehicle speed. By this way, it is now possible to operate the engine at its maximum efficient or performance point and fix it at that operating point without losing from the vehicle speed. Instead of using gears, which are the main transmission elements of conventional transmission, CVT uses two pulleys and a belt. By changing the pu...
Evaluation of structural analysis methods used for the design of tbm segmental linings
Çimentepe, Ahmet Güray; Caner, Alp; Department of Civil Engineering (2010)
Contrary to the linings of conventionally driven tunnels, the linings of tunnels bored by tunnel boring machines (TBMs) consist of precast concrete segments which are articulated or coupled at the longitudinal and circumferential joints. There are several analytical and numerical structural analysis methods proposed for the design of TBM segmental linings. In this thesis study, different calculation methods including elastic equation method and two dimensional (2D) and three dimensional (3D) beam – spring m...
Utilization of neural networks for simulating vehicle induced air velocity in underground tunnels
Koç, G.; Albayrak, Kahraman; Sert, Cüneyt (2012-12-01)
Air velocities induced by underground vehicles in metro tunnels equipped with ventilation shafts are obtained using artificial neural networks. Complex tunnel shaft-systems with any number of tunnels and shafts and with most of the practically possible geometries encountered in underground structures can be simulated with the proposed method. A single neural network, of type feed-forward back propagation, with a single hidden layer is trained for modeling a single tunnel segment. Train and tunnel parameters...
Prediction of automobile tire cornering force characteristics by finite element modeling and analysis
Tönük, Ergin; Ünlüsoy, Yavuz Samim (2001-05-01)
In this study, a detailed finite element model of a radial automobile tire is constructed for the prediction of cornering force characteristics during the design stage. The nonlinear stress-strain relationship of rubber as well as a linear elastic approximation, reinforcement, large displacements, and frictional ground contact are modeled. Validity of various simplifications is checked. The cornering force characteristics obtained by the finite element tire model are verified on the experimental setup const...
Citation Formats
M. Sarıgöl, “Modeling of ground-borne vibration from underground railway systems,” M.S. - Master of Science, Middle East Technical University, 2007.
METU IIS - Integrated Information Service open@metu.edu.tr