Analysis of Dynamic Behavior of the Train, Slab Track, and Subgrade Coupling System
With several competitive advantages over conventional ballast tracks, slab tracks are widely applied in countries where high-speed railways are well developed.
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Analysis of Dynamic Behavior of the Train, Slab Track, and Subgrade Coupling System
With several competitive advantages over conventional ballast tracks, slab tracks are widely applied in countries where high-speed railways are well developed. Today, China is actively developing passenger-dedicated lines, with slab tracks laid section by section as the major type of track structure. But in terms of this advanced slab track structure type, experience in the systematic designing, construction, supervision, operation, and maintenance of the structure is still lacking. As for the vibration and deformation characteristics, operation reliability and safety of the slab track under moving train loads, theoretical, and experimental research are also in great need. In this sense, it is of great practical value to make a dynamic behavior analysis on the slab track. The dynamic interaction between the high-speed train and the slab track is the key issue for the vibration analysis of the train-track coupling system. The forced vibration of the slab track structure under moving train loads directly influences the working state and service life of the structure. Meanwhile, the riding quality and safety are the important indexes to evaluate whether the parameters of the slab track structure are reasonably designed or not. Compared with the ballast track, the slab track has a higher stiffness, which induces stronger vibration of the high-speed wheel-rail system. Track foundation stiffness is not only one of the key factors which influence the riding performance of the train, but also an important parameter in influencing the dynamic characteristics of the wheel-rail system. With the rapid development of high-speed railways, slab track foundation stiffness has become one of the hot issues for researchers both at home and abroad. Based on the model and the algorithm of the vehicle element and track element proposed in Chap. 9 [1–6], dynamic behavior of slab track structure under moving train loads is investigated in this chapter. Especially, parameter analysis of the structure will be carried out. Through the parameter analysis, it attempts to optimize parameters of the slab track structure so as to abate track deformation, prolong track service life, and improve track stability.
© Science Press, Beijing and Springer Nature Singapore Pte Ltd. 2017 X. Lei, High Speed Railway Track Dynamics, DOI 10.1007/978-981-10-2039-1_13
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13.1
Example Validation
In order to verify the model and the algorithm of the train-slab track-subgrade coupling system presented in this chapter, a vertical vibration characteristic analysis of the train–Bögle slab track coupling system is performed by the consideration of two kinds of track conditions, i.e., the smooth track and the irregularity track. The vehicle concerned is China-star high-speed train which is marshaled by a motor car and a trailer. Parameters for China-star high-speed train and for the Bögle slab track adopt those in R
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