Lateral Vibration of Middle Cars of Shinkansen Train in Tunnel Section (Analysis of Running Characteristics of Test Train Due to Gap Flow Induced Model)

摘要

To investigate the lateral vibration mechanism of middle cars of Shinkansen train in tunnel section, field tests and numerical simulations are performed. From the analysis of car body vibration and air pressure around the carbody, the following results are obtained. (1)The pressure fluctuation on the wall side of the carbody is correlated with the lateral vibration in tunnel section. (2) The yawing vibration mode tends to become dominant. (3)The dominant frequency increases and the negative damping is added to the original carbody dynamic system as the running speed increases.