Study on vibration energy characteristics of vehicle-track-viaduct coupling system considering partial contact loss beneath track slab

Linya Liu; Zhiyuan Zuo; Qinyue Zhou; Jialiang Qin; Quanmin Liu

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자료유형: 학술저널

저자정보: Linya Liu (East China Jiaotong University) Zhiyuan Zuo (East China Jiaotong University) Qinyue Zhou (East China Jiaotong University) Jialiang Qin (East China Jiaotong University) Quanmin Liu (East China Jiaotong University)

저널정보: 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.75 No.4

발행연도: 2020.1

수록면: 497 - 506 (10page)

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CA mortar layer disengagement will give rise to the overall structural changes of the track and variation in the vibration form of the ballastless track. By establishing a vehicle-track-viaduct coupling analysis and calculation model, it is possible to analyze the CRTS-I type track structure vibration response while the track slab is disengaging with the power flow evaluation method, to compare the two disengaging types, namely partial contact loss at one edge beneath track slab and partial contact loss at midpoint beneath track slab. It can also study how the length of disengaging influences the track structures vibration power. It is showed that when the partial contact loss beneath track slab, and the relative vibration energy level between the rail and the track slab increases significantly within [10, 200]Hz with the same disengaging length, the partial contact loss at one edge beneath track slab has more prominent influence on the vibration power than the partial contact loss at midpoint beneath track slab. With the increase of disengaging length, the relative vibration energy level of the track slab grows sharply, but it will change significantly when it reaches 1.56 m. Little effect will be caused by the relative vibration energy level of the viaduct. The partial contact loss beneath the track slab will cause more power distribution and transmission between the trail and track slab, and will then affect the service life of the rail and track slab.

#high-speed railway #vibration energy #dynamic compliance method #Contact Loss Beneath Track slab

참고문헌 (23)

참고문헌 신청

Carlone, L / 2001 / Vibration of a rail coupled to a foundation beam through a series of discrete elastic supports

Dai, G. / 2018 / Experimental study on deformation of CRTS II ballastless track-simply supported beam bridge under dynamic load / J. Vib. Shock 37(07):102~108

Fu, N. / 2018 / Study of vibration energy properties of double-block ballastless damping track / J. China Railway Soc 40(10):115~122

Fenander, Å. / 1997 / Frequency dependent stiffness and damping of railpads / Proc. Institution of Mech. Eng., Part F J. Rail Rapid Transit 211(1):51~62

Hamet, J. F. / 1999 / Railway noise: Use of the Timoshenko model in rail vibration studies / Acta Acustica united with Acta Acustica united with Acustica, Acustica 85(1):54~62

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