SIMPLIFIED COLLISION ANALYSIS METHOD FOR SUBMERGED FLOATING RAILWAY USING THEORY OF BEAM WITH ELASTIC FOUNDATION

초록

Submerged floating railway is an innovative tunnel infrastructure passing through the deep sea independent of wave and wind so that high speed train can run. It doesn’t depend on water depth and is cost effective due to modular construction on land. The construction period can be reduced drastically. In this paper, a concept design of submerged floating railway is introduced and a method to analyze structural behavior of the body in case of collision with a submarine is proposed for securing safety. Theory of beam with elastic foundation was used to calculate equivalent mass of the body so that the perfect elastic collision could be applied to calculate the collision velocity. Maximum deformation and bending moment were analyzed based on energy conservation. For verification of the analysis results, collision analysis using finite element analysis code was made. Comparison with the results showed that this simplified collision analysis method gives accurate deformation and bending moment enough to be used for actual estimation in initial design stage.