Dynamic Response Characteristics for Two-layered Trackbed Structure by Train Load

열차하중에 의한 이층노반구조의 동적 응답특성

  • 이일화 (한국철도기술연구원 철도구조연구실)
  • Received : 2011.01.27
  • Accepted : 2011.03.20
  • Published : 2011.04.26


It is difficult to clarify the dynamic response characteristics of trackbed because of various environmental conditions. However, track irregularity be affected by ununiformed bearing capacity and its dynamic response, study for dynamic response characteristics is required to investigate the cause of track irregularity and countermeasure. In this paper, the response variation for dominant frequency and vibration energy by trackbed structure and material stiffness are investigated. The analysis section is two layered ground structure that is comprised of trackbed and soft rock. This structure amplifies the energy of dominant range easily. It is evaluated to affect track irregularity on comparing by theoritical, analytical and empirical method for dynamic response of the trackbed.


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