Proceedings of the KSR Conference (한국철도학회:학술대회논문집)
- 2005.11a
- /
- Pages.443-447
- /
- 2005
Theoretical Study for the Resonance Speed and Frequency in Roadbed on the Base Rock
암반상 토노반 구간에서의 공진 속도 및 주파수에 대한 이론적 연구
Abstract
When the high-speed train running on the track, there is a speed band which track distortion is unusually increased according to the condition of track and roadbed. This speed is called critical velocity and physical parameter value increased greatly. These phenomenon happened as high-speed train were developed, studied regularly through TGV 100 running test in France. As research result until now, the main reason is soft roadbed's capacity. Wave propagation and track support capacity is varied by the site characteristics. This paper achieved theoretical examination about resonance band(speed and frequency) that occurred in roadbed on the base rock in point of geotechnical engineering. The examination of resonance divides with ground response analysis, critical band analysis by the shear wave velocity of roadbed, train critical speed through the ground stratum.
Keywords