고속철도차량 전두부 개념하부구조의 압괴특성평가를 위한 정압괴시험

초록

There is a new attempt to absorb crash energy in train cab structure with push-back mechanism. To investigate the efficiency of this, the crash test will be implemented in CNTK, and before that, the important components of absorbing kinetic energy were pre-verified by static test. In this paper, the under-frame structure with main absorbing components was examined. It consist of 150ton tube, 100ton tubes, tension bolts, shear bolts, and H-beams for structural configuration. First of all, there was a numerical evaluation of non-structural absorbing devices such as expansion tubes, trigger elements such as tension bolts and shear bolts, and the strength of the basic structure. Then the whole under-structure with the devices was tested by using 10000kN UTM. In the result, when comparing design loads, 150ton tube has a 3.57% error and 100 ton 1.265%, and shear bolts have 3.45%. As considering the test outcome, the performance could be assessed as satisfying the design intention.