scholarly journals Analysis and Research on Current-carrying Friction and Wear of High-speed Train Pantograph Slide and Contact Wire Based on Computer Simulation Analysis

2020 ◽  
Vol 1648 ◽  
pp. 032031
Author(s):  
Ruyu Wang ◽  
Zhiguo Zhang ◽  
Jialong Zhong
Keyword(s):  
Computer Simulation ◽  
High Speed ◽  
Friction And Wear ◽  
Simulation Analysis ◽  
High Speed Train ◽  
Contact Wire

Measures to Reduce the Lateral Vibration of the Tail Car in a High Speed Train

1996 ◽  
Vol 210 (2) ◽  
pp. 87-93 ◽  
Author(s):  
H Fujimoto ◽  
M Miyamoto
Keyword(s):  
Vibration Amplitude ◽  
High Speed ◽  
Vibration Mode ◽  
Simulation Analysis ◽  
Lateral Vibration ◽  
High Speed Train ◽  
Aerodynamic Forces ◽  
Vibration Data ◽  
Tunnel Section ◽  
Train Vibration

From the vibration data obtained simultaneously on several cars in the same Shinkansen train, it was observed that the vibration amplitude of the tail car is greater than those of the other cars in a train. The authors' analysis arrived at the conclusion that the vibration mode of a train has a tendency for the tail car to vibrate more than the others, when the carbody hunting characteristics of a train for the yawing mode are likely to emerge, and when aerodynamic forces work in a tunnel section. Referring to those results, by simulation analysis etc., it was found that two longitudinal dampers installed parallel between the car ends (Fig. 1) with their forces depending on the angular velocity between cars, are effective in decreasing the train vibration including the tail car's vibration. Then, the prototype of the longitudinal dampers between the cars for Shinkansen was designed by obtaining the proper damping coefficient through simulation. The effectiveness of the installed damper was verified when it was tested up to 310 km/h in the Shinkansen train.

scholarly journals Study on Friction and Wear Properties of Pantograph Strip/Copper Contact Wire for High-Speed Train

2014 ◽  
Vol 8 (1) ◽  
pp. 125-128 ◽  
Author(s):  
Tao Ding ◽  
Wenjing Xuan ◽  
Qiudong He ◽  
Hao Wu ◽  
Wei Xiong
Keyword(s):  
Wear Rate ◽  
Electric Current ◽  
High Speed ◽  
Friction And Wear ◽  
Optical Microscope ◽  
Wear Properties ◽  
Contact Wire ◽  
Arc Erosion ◽  
The Coefficient Of Friction ◽  
Friction And Wear Properties

A series of experiments on friction and wear properties of carbon strip rubbing against copper contact wire is performed on high-speed friction and wear tester with electric current. The results show that the friction coefficient is generally maintained between 0.24 and 0.37. In the absence of electric current, the coefficient of friction is higher than that in the presence of electric current. The wear rate of carbon strip materials is generally not more than 0.014g/km. In particular, the wear rate under the electric current of 240 A is 14 times more than that in the absence of electric current. By observing the scar of worn surface with optical microscope, it can be found that there are obvious slip scars and arc erosive pits. The dominated wear mechanisms are abrasive wear and arc erosion in electrical sliding frictional process.

Modeling and Control of Pantograph and Contact Wire for High Speed Train

2000 ◽  
Author(s):  
Marco Muenchhof ◽  
Timothy Hindle ◽  
Tarunraj Singh
Keyword(s):  
Control Strategy ◽  
High Speed ◽  
Control Strategies ◽  
Optimization Techniques ◽  
High Speed Train ◽  
Modeling And Control ◽  
Contact Wire ◽  
Closed Form Solutions ◽  
Mass Damper ◽  
And Control

Abstract The paper focuses on the modeling and control of a catenary-pantograph system. For the catenary system, only the contact wire is considered. Initially, the case of a constant force traveling at a constant velocity along the wire is investigated and closed form solutions are derived. Next, the pantograph dynamics are considered using a simple spring-mass-damper model, where the force is no longer assumed to be constant. The need for control in this case is apparent and motivates two different control strategies. The first control strategy utilizes a feed-forward Fourier series control profile. For the second control strategy, a proportional force feed-back control is added. All control parameters are obtained using constrained optimization techniques. Stability and sensitivity issues are addressed.

Computer Simulation Analysis on Feature Extraction of High Speed Signal Based on Bayesian Algorithm

2014 ◽  
Vol 556-562 ◽  
pp. 4982-4985
Author(s):  
Hong Jiang
Keyword(s):  
Computer Simulation ◽  
Extraction Method ◽  
High Speed ◽  
High Efficiency ◽  
Simulation Analysis ◽  
Academic Discourse ◽  
System Structure ◽  
Positive Contribution ◽  
Bayesian Algorithm ◽  
Chinese Characteristics

The discipline of journalism needs to gradually transform perspective. It combines with the characteristics of academic discourse of news communication to build a strong Chinese characteristically academic discourse system of news, so as to make a positive contribution to the development of Chinese journalism discipline. First, we analyze the general compensation model on the basis of compensation algorithm. Based on more compensation formulas, we analyze the principle of compensation. According to the basic requirements of the news communication and the unique function of Chinese characteristically academic discourse, with the basic requirements of the unique characteristics of academic discourse for news communication and Chinese characteristics, and combined with the relative reliability features extraction method of information builds academic discourse system of Chinese characteristics news communication based on Bayesian algorithm. We apply the computer to make simulation analysis on the effect of different classes' weighting factors on the system structure. The results show that the system structure has a high efficiency, good stability, and strong practicability, which has provided theoretical and technical support for the research in this field to a certain extent.

scholarly journals Dynamic Simulation Analysis on Axle Spline of High-Speed Train Gauge-Change System

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Jinyi Bai ◽  
Wenjing Wang ◽  
Pingyu Zhou ◽  
Yuguang Wang
Keyword(s):  
High Speed ◽  
Impact Analysis ◽  
Simulation Analysis ◽  
High Speed Train ◽  
Analysis Model ◽  
Surface Integral ◽  
Normal Loading ◽  
Loading Case ◽  
Quasistatic Loading ◽  
Change System

Spline couplings are widely used in transmission systems to transfer torque due to their higher load carrying capacity and better durability performance. Most researches are conducted under static and quasistatic loading cases; however, very little is known about their contact behavior and stress distribution under dynamic loading cases, especially as a key transmission component between wheel and axle. In this paper, a 3D dynamic contact and impact analysis model of the wheel-axle spline of high-speed train gauge-change system is employed in order to investigate the effect of driving velocity and assembling error and vibration on spline couplings. Three categories of loading cases are considered: (i) 0.3 m/s2 driving rate representing quasistatic loading case; (ii) 0.5 m/s2 driving rate representing normal loading case, and (iii) 1 m/s2 driving rate representing exceptional loading case. Aside from this, influence of spline misalignment, including radial misalignment and circumferential misalignment, has been investigated under normal loading case. Numerical results for surface integral contact analysis conducted by LS-DYNA and MATLAB were presented and compared for the verification of the results.

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