고속철도차량 전두부 개념구조의 수치모델을 활용한 동적압괴특성 평가

초록

Currently we’ve made an effort to improve crashworthiness of cab area of high speed train. To do this, the push-back mechanism was adopted and applied to the concept. The characteristics of head structure developed in this paper only has expansion tubes to decrease the kinetic energy and driver's zone can be moved backward to protect driver. To implement this study, first we established energy absorbing strategy and then mechanism of the concept was sketched. Second, topology optimization was done to decide the location of beams. Third, detailed geometry was modeled by CATIA and finite element model for LS-DYNA input was created by HyperMesh. At the end, the numerical model was simulated to evaluate energy absorption mechanism. In the result, numerical simulation showed that the conceptual head structure works well following the intended design strategy. In the near future, the real test will be implemented and the result will be compared with simulation result to calibrate the numerical model.