Research on Lateral Vibration Coupling Mechanism of a High-Speed Train Based on Singular Coefficients

2021 ◽  
Author(s):  
Qiang Zhao ◽  
Mingwei Piao
Keyword(s):  
High Speed ◽  
Coupling Mechanism ◽  
Lateral Vibration ◽  
High Speed Train ◽  
Singular Coefficients ◽  
Vibration Coupling

Research on lateral vibration coupling mechanism of high-speed train based on singular coefficients

2021 ◽  
pp. 54-61
Author(s):  
Zhao Qiang ◽  
◽  
Piao Mingwei ◽  
Keyword(s):  
Gaussian Processes ◽  
High Speed ◽  
Experimental Testing ◽  
Statistical Characteristics ◽  
Coupling Mechanism ◽  
Lateral Vibration ◽  
High Speed Train ◽  
Singular Coefficient ◽  
Non Gaussian ◽  
Vibration Coupling

The lateral vibration coupling mechanism is the basic law of the current vibration behavior of high-speed train. The main reason is that there are design defects in the prototype of ICE3 bogie. Therefore, the passenger dedicated line is not a necessary and sufficient technical condition for ensuring the stability and safety of high-speed railway operation. Based on the previous research, this article further develops the theoretical demonstration and experimental verification of the lateral vibration coupling mechanism of high-speed train. According to the concept of system stiffness and the statistical characteristics of Gaussian process, a new concept of singular coefficient is proposed to describe non-stationary and non-Gaussian processes. Combined with the quality vibration tracking test of a high-altitude vehicle, the conclusions are in good agreement through the experimental testing and the dynamic simulation. The application of the singular coefficient further gives three conditions for determining the lateral vibration coupling mechanism of high-speed train, namely sufficient excitation energy, vibration transmission medium and coupling resonance possibility. Aiming at the influence of high-order modal interception and residual force of flexible body, the new concept of singular coefficient is applied. The rigid-flexible coupling simulation reflects the main statistical characteristics of non-stationary and non-Gaussian processes, and reveals the current lateral vibration coupling mechanism of high-speed train.

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.

The Effect of Delayed Feedback Control on Lateral Semi-Active Suspension System for High-Speed Train

2013 ◽  
Vol 753-755 ◽  
pp. 1795-1799 ◽  
Author(s):  
Xiao Wei Huang ◽  
Yan Ying Zhao
Keyword(s):  
Time Delay ◽  
Feedback Control ◽  
High Speed ◽  
Active Suspension ◽  
Suspension System ◽  
Delayed Feedback Control ◽  
Lateral Vibration ◽  
High Speed Train ◽  
Passive Suspension ◽  
Passive Suspension System

In order to suppress the lateral vibration of high-speed train caused by track irregularity, the delayed feedback control is employed to suppress the vibration of the semi-active suspension system. The 1/4 vehicle mathematical model of semi-active suspension system is established. The amplitude of the bodys lateral vibration is large at some values of external excitation frequency for the passive suspension system, and it could be suppressed at some values of time delay, while the vibration of the bodys lateral vibration may be deteriorated at other values of time delay. The results show that the amplitude of the bodys lateral vibration could be suppressed about 50% when the suitable values of damping coefficient and time delay are chosen by comparing with the passive suspension system. The analytical results of this paper are in good agreement with the numerical simulation.

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