Field test measurement of the dynamic tightness performance of high-speed trains and study on its influencing factors
Journal article, 2019
During the actual operation of a high-speed train, the airtight performance of the carriages will change significantly. Based on a series of field tests, the external and interior pressure variations of train carriages are measured and then the dynamic pressure tightness coefficient are analysed quantitatively for investigating the airtight performance of a train passing at various speeds through tunnels of different lengths. It is found that the amplitude of the external pressure variations is proportional to the square of the train speed, while the amplitude inside the vehicle is approximately proportional to the speed to the 0.7th power due to the airtight effect. The dynamic pressure tightness coefficient increases with increasing tunnel length and decreases with increasing train speed. Regarding the effect of the carriage location, the coefficient shows an overall increasing trend from the train head to tail.
Field test
High-speed train
Dynamic pressure tightness coefficient
Tunnel
Pressure variation
Author
Tang hong Liu
National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle
Central South University
Joint International Research Laboratory of Key Technology for Rail Traffic Safety
Mingyang Chen
National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle
Central South University
Joint International Research Laboratory of Key Technology for Rail Traffic Safety
Xiao dong Chen
University of Manchester
Shengen Geng
National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle
Joint International Research Laboratory of Key Technology for Rail Traffic Safety
Central South University
Zhen hua Jiang
Joint International Research Laboratory of Key Technology for Rail Traffic Safety
National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle
Central South University
Sinisa Krajnovic
Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics
Measurement: Journal of the International Measurement Confederation
0263-2241 (ISSN)
Vol. 138 602-613Subject Categories
Sport and Fitness Sciences
Infrastructure Engineering
Vehicle Engineering
DOI
10.1016/j.measurement.2019.02.051