충돌 동흡진기를 이용한 레일 진동저감 매카니즘 분석

초록

Impact absorber is a device that has characteristics of impact damper and absorber. The impact absorber not only has efficient reduction in tuned frequency, but also has greater damping than absorber since the effect of energy dissipation by impact. In order to analyse the mechanism of vibration reduction of railway, the finite element method is applied theoretically. By FEM can analyse the vibrational behaviour of damped free rail in both time and frequency domain. Analysis result, the performance of impact absorber is very effective in high frequency range, especially in rolling noise frequency. To test the performance of the impact absorber, impact absorbers are installed on a ‘freely’ supported rail and verify the mechanism experimentally. The result can be utilized to reduce the rolling noise from high-speed trains.