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During the past few years, trenchless technologies have been gaining popularity in the area of existing buried utilities and structures due to economic and environmental factors. In addition, those technologies have been becoming more and more familiar to engineers and practitioners in the field as more projects are constructed. There is a summary of the more useful five trenchless technologies in...
A model of monolithic roadbed track system was established based on the finite element method (FEM). Modal and harmonic response analysis are carried out. Vibration features and dynamic response of the system are analyzed. The effect of different parameters, including rail fastenings, sleepers and elastic pads, on the riding comfort and the transmission rate of the track system is calculated. The...
After establishing the vehicle-track finite element model, the system vibration characteristic is analysised. With the method of modal and harmonic response analysis, the effects on the riding comfort and foundation reaction of different steel spring stiffness and damping were studied. The sperling index reflects the riding comfort. At the same time, the foundation reaction and the force transmission...
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