In this study, a theoretical investigation of optimized sleeper spacing which can suppress resonances of a railway track is attempted. To achieve this, we introduced a minimization problem in which the objective function is given by the wave transmittance and the design variable is defined by sleeper distribution. In the analysis the rail is modeled by a Timoshenko beam and the sleeper is represented by a mass. The infinite track analysis is realized by attaching the transmitting boundaries at both ends of the finite optimization region. Through numerical analyses the sleeper spacing effective in reduction of the transmittance is discussed. Furthermore, the feasibility of the proposed method is validated in the aspect of vibration reduction through response analyses for a harmonic load.

• Sodbilig Batjargal(Graduate School of Science and Technology, Niigata University) | 소드빌릭 바트자갈
• Kazuhisa Abe(Department of Civil Engineering and Architecture, Niigata University) | 카주히사 아베 Corresponding author
• Kazuhiro Koro(Graduate School of Science and Technology, Niigata University) | 카주히로 고로