A Study of Riding Comfort Evaulation of Korean Next-generation High-speed Railway

초록

The Korean Train Express (KTX) has been in commercial operation in Korea since 2004 and The Korean Train Express Sancheon which was developed by own Korean technology, has started the commercial service from 2010. These KTXs have a maximum speed of 300km/h, runs on the high speed rail. In order to see further progress, we need to continuously develop new technologies that can effectively respond to rapidly global railway market demands, the next generation high-speed rail technology development project was started from 2007 and promoted by the Ministry of Land, Transport and Marine Affairs. The goal of the project is the development of the core technologies for EMU(electric-multiple unit) type high-speed railway. The prototype train, named by HEMU-430x, was developed for 4years and tested on the high-speed line from 2012. During the test, over 500 signals are monitored and recorded to the measurement system which was developed by our own technology. HEMU-430x is composed with 1trailer car (Tc) and 5 motorized cars (M1, M2, M3, M4, and MC) To satisfy the request of passengers, it is essential to improve the riding comfort of vehicle. HEMU-430x is designed to make better of comfortable ride of passengers. The improvement effort of facilities of train is being continued. In this study, the authors show some of the evaluation results of riding comfort during the run under the assessment method of the International Union Railways. The riding comfort test is performed in M2, the grand class car. The 3-diraction seat accelerometers are installed on the floor and the each acceleration is filtered from 0.4 to 80 Hz. The powers of the each acceleration are obtained with 60 blocks of 5 seconds intervals and filtered again in the frequency domain with several weighting factor. The experimental results show the good possibilities of excellent riding comfort if this train launches commercial line in service.