Author(s)

Y.J. Lee

Abstract

Hanjin Heavy Industries Co., Ltd. has developed and constructed high speed passenger coaches running from Guangzhou to Hengyang in China with the running speeds up to 200 km/h. Ministry of Railway in China requested that the cabin inside noise of the passenger coaches be less than 65 dB(A) at maximum speed. Various tests and calculations on the cabin inside noise are performed to design the structures of car bodies under the assumption that both the wheel/rail noise and the aerodynamic noise have the value of 100 dB(A) and 95 dB(A), respectively. 1. Introduction Hanjin Heavy Industries Co., Ltd. has developed and constructed five types high speed passenger coaches, first class car with compartments, second class car, second class car with broadcasting room, dining car

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