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.

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.

Influence of Wheel Diameter Difference on Safety and Stationarity of Vehicles Crawling over the Curved Bridge

2012 ◽  
Vol 209-211 ◽  
pp. 2117-2120 ◽  
Author(s):  
Shi Gang Sun ◽  
Li Nan Li ◽  
Jun Long Zhou ◽  
Wei Li
Keyword(s):  
High Speed ◽  
Simulation Analysis ◽  
Analysis Model ◽  
Operation Performance ◽  
Curved Bridge

Wheel diameter difference has great impact on the operation performance of vehicles which are traveling on the curved bridge. A simulation analysis model was built to analyze the influence of wheel diameter difference on safety and stationarity of vehicles on the curved bridge. The results demonstrate that along with the increase of wheel diameter difference, the security of vehicles on the curved bridge decreases and the vehicles run unsteadily. So the wheel diameter difference should be diminished as much as possible, especially strictly controlling the wheel diameter difference of high-speed vehicles.

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