A study on the development of core soundproof devices for reduction of the environmental noise in 400km/h high speed railway

摘要

This study, for the development of next generation high speed railway system of a trainrnwhich has maximum speed over 400km/h, is to develop core generic environmentalrntechnologies which are soundproof technology. Also this technology contains the emittingrnnoise performance of high speed operated trains. The ultimate purpose of this study is torndevelop a new technology of core sound proof system which is more economical andrnefficient to cope with the noise increased about 7～9dB as the operating speed increased torn400km/h. In view of technology, this study is to the new soundproof shape design, noisernabsorbing material development, core soundproof facility development, noise reductionrnmethod which contains the aerodynamic characteristics of noise, the concrete bed trackrnreflecting noise reduction, the specifications absorbing block of concrete bed and therninstallation and management of core soundproof system.