Analysis of Harmonic Stability in Heavy-Haul Railways Based on Impedance Method

2021 ◽  
Author(s):  
Xiangyu Meng ◽  
Zhigang Liu ◽  
Xunjun Chen ◽  
Siqi Wu
Keyword(s):  
Impedance Method ◽  
Heavy Haul ◽  
Harmonic Stability

Curving Performance of Heavy-Haul Freight Wagons under Asymmetric Brake Shoe Pressures

2020 ◽  
Author(s):  
Kailong Zhang ◽  
Pengfei Liu ◽  
Yunqiang Cao ◽  
Yifan Yan
Keyword(s):  
Brake Shoe ◽  
Heavy Haul ◽  
Curving Performance ◽  
Freight Wagons

DETECTION OF INCLUSIONS IN A BREAST MODEL USING THERMAL IMPEDANCE METHOD

2019 ◽  
Author(s):  
Iago Smanio Saad ◽  
Gilmar Guimaraes ◽  
CLEUDMAR ARAÚJO ◽  
Gabriela Lima Menegaz
Keyword(s):  
Impedance Method ◽  
Thermal Impedance

scholarly journals Field Investigation and Rapid Deterioration Analysis of Heavy Haul Corrugation

2021 ◽  
Vol 11 (14) ◽  
pp. 6317
Author(s):  
Feng Jin ◽  
Hong Xiao ◽  
Mahantesh M Nadakatti ◽  
Huiting Yue ◽  
Wanting Liu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Fatigue Cracks ◽  
Field Measurements ◽  
Field Investigation ◽  
The Finite Element Method ◽  
Rail Corrugation ◽  
Rapid Deterioration ◽  
Heavy Haul

In this study, the rapid growth of corrugation caused by the bad quality of grinding works and their wavelength, depth, and evolution processes are captured through field measurements. The residual grinding marks left by poor grinding quality lead to further crack accumulation and corrugation deterioration by decreasing plastic resistance in rails. In this case, the average peak-to-peak values of corrugation grow extremely fast, reaching 1.4 μm per day. The finite element method (FEM) and fracture mechanics methodologies were used to analyze the development and trends in rail surface crack deterioration by considering rails with and without grinding marks. Crack propagation trends increase with residual grinding marks, and they are more severe in circular curve lines. To avoid the rapid deterioration of rail corrugation, intersections between grinding marks and fatigue cracks should be avoided.

Field test and numerical analysis of Insulated rail joints in heavy-haul railway

2021 ◽  
Vol 298 ◽  
pp. 123905
Author(s):  
Hong Xiao ◽  
Guangpeng Liu ◽  
Dongwei Yan ◽  
Yue Zhao ◽  
Jiaqi Wang ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Field Test ◽  
Heavy Haul ◽  
Heavy Haul Railway

Indirect identification of wheel rail contact forces of an instrumented heavy haul railway vehicle using machine learning

2021 ◽  
Vol 160 ◽  
pp. 107806
Author(s):  
A.C. Pires ◽  
G.R. Mendes ◽  
G.F.M. Santos ◽  
A.P.C. Dias ◽  
A.A. Santos
Keyword(s):  
Machine Learning ◽  
Contact Forces ◽  
Railway Vehicle ◽  
Heavy Haul ◽  
Indirect Identification ◽  
Heavy Haul Railway

The impedance method in the theory of surface acoustic waves in periodic structures

2004 ◽  
Vol 96 (6) ◽  
pp. 3117-3126 ◽  
Author(s):  
S. V. Biryukov ◽  
M. Weihnacht
Keyword(s):  
Acoustic Waves ◽  
Periodic Structures ◽  
Surface Acoustic Waves ◽  
Impedance Method

Optimization of a Prestressed Concrete Railroad Crosstie for Heavy-Haul Applications

2011 ◽  
Vol 137 (11) ◽  
pp. 815-822 ◽  
Author(s):  
Devin K. Harris ◽  
Russell H. Lutch ◽  
Theresa M. Ahlborn ◽  
Pelle Duong
Keyword(s):  
Prestressed Concrete ◽  
Heavy Haul

The Kinematics Analysis and Study on Triangular Elbow Servo Press

2011 ◽  
Vol 121-126 ◽  
pp. 1636-1640
Author(s):  
Ying Qiu ◽  
Wei Min Li ◽  
Zhi Wei
Keyword(s):  
Optimization Design ◽  
Research Field ◽  
Transmission Mechanism ◽  
Kinematics Analysis ◽  
Servo Motor ◽  
Forming Process ◽  
Servo Press ◽  
Heavy Haul ◽  
Slider Motion

Servo presses are widely used in high-precision, complicated forming process fields and promoted around the world in recent years. It is the trend of forging machinery for its servo motor-based digital heavy haul driven technology. At present, it becomes the hot research field. The structure characteristics of triangular elbow servo press were firstly introduced in the paper. And then the kinematics mathematical model of triangular elbow transmission mechanism was deduced and given. Based on it, this paper provides the slider kinematics analysis by Matlab. The slider motion law under various parameters can be analyzed and compared. The results would be useful reference for optimization design of transmission mechanism. The case study provides more visual and reliable decision basis for designer.

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