The Development of Virtual Testing Model for Korea High Speed Train

초록

The Korea Railroad Research Institute has been conducting research of crashworthiness evaluation for train collisions. This paper describes the development and evaluation of a crash dynamics model for KHST as an effective crashworthiness assessment method. It has 1D and 3D FE train models. It is designated as VTM because it could be utilized instead of full rake train test. It has largely two noticeable characteristics in aspect of modeling method. One is that it incorporates complete flexible parts and reflects force-displacement behaviors of suspension and connection devices in spite of full 3D dynamics model. Another is that it considers propagation of crash force after first crash. So, it consists of 20 vehicles with three 3D models and seventeen 1D models based on previous studies. Because of the figures, a simulation of VTM makes it possible to predict all behavior by 1D, 2D, and multibody dynamics models. In addition to that, it can describe twisting of a car body, unexpected buckling, and so on. This model is utilized to develop passive safety devices and structures in the whole train industry. For instance, it was used to evaluate a buffer stop and is expected to be used in process of head structure development of train and a method of validation for satisfaction of train safety standard. This paper simulated four kinds of scenarios to evaluate VTM for KHST. The first scenario describes collision situation with a stationary 15ton truck at 110kph. The second scenario gives a description of collision situation with an obliquely stationary 15ton truck at 110kph. The third scenario shows a head-on collision at relative velocity 60kph. The last scenario shows a head-on collision at relative velocity 16kph. The results from them are compared with previous proved study paper results and the useability of VTM is assessed and discussed.