Key problems faced in high-speed train operation

Abstract

Jin / J Zhejiang Univ-Sci A (Appl Phys & Eng) 2014 15(12) Nov. 18, 2014; Crosschecked Nov. 19, 2014 Abstract: This paper discusses some key problems faced in high-speed train operation. These problems include: wheel tread concave wear causing the lateral oscillation of the train in operation, wheel roundness higher-order polygonal wear leading to fierce vertical vibration of wheel/rail and abnormal vibration noise of the coach interior of the train thus causing loosening and cracking of the train bogie parts, short pitch rail corrugation generation on the part of the track, fracture of cushion layer and road base fracture of the track, and increased noise inside and outside the train. At present, the mechanism of the occurrence and development of these phenomena is still not fully understood. This paper briefly reviews the related research on these problems in China and abroad, including many important recent papers and the articles published in this special issue. They make outstanding contributions to solving these problems, and include important work on train-track coupling large system theory, the relationship theory and technique of wheel/rail, and the vibration-noise reduction technology of the train.

Contemporary Inspection and Monitoring for High-Speed Rail System

“…There are two major causes behind initiation and development of wheel tread local defects: thermal cracking and rolling contact fatigue (RCF) [6]. Several factors, such as speed, axle load, wheel-rail adhesion, wheel material and braking conditions, also have some effects on deterioration rates of wheel tread [7]. In HSR operation, wheel wear rate can increase quickly due to the high operation speed, high stiffness track, wide wheel-rail impact frequency, intense vibrations and high speed flow [5,7,8].…”

Sustainability development strategy of China’s high speed rail

“…The construction of China's high speed rail provides a convenient, economic, rapid, comfortable, and ecological mass transport tool for our people, and it also affects the regional economic pattern of China (Jin, 2014). It has had a warm reception from our people, industry, investors, and the government.…”

Effect of softening of cement asphalt mortar on vehicle operation safety and track dynamics

“…At present, two important criteria are widely used to evaluate the dynamic behavior and safety operation of high-speed trains (Xiao et al, 2007;2014;Zhou and Shen, 2013). One is Nadal's criterion (derailment coefficient), denoted by Eq.…”

“…In the numerical simulation, different degrees of CAM softening are considered under one slab. A moving rail-support is adopted as a new vehicle-track coupling interface excitation model (called the "Tracking Window") (Jin and Wen, 2008;Xiao et al, 2011;Jin, 2014). This excitation model is closer to a real moving vehicle under the excitation of discrete sleepers, and saves a lot of computation time.…”