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In this paper, crashworthiness of the KHST carbodies is evaluated by numerical simulation under the SNCF accident scenario (collision against a movable rigid mass of 15 ton at 110 kph) and the scenario of train-to-train collision at 30 kph. The numerical results of the several simulations, such as the accident collided against a deformable dump truck of 15 tons at 110 kph, the driver"s dummy analysis using the integrated analysis method, and the accident of train-to-train collision for the first three units at 30 kph, show good performances in the viewpoint of energy absorption and survival space.
The most important technology to improve crashworthiness of high speed trains is to design their front structures to absorb crash energy easily. In this paper, crashworthy designs of the front structures in KTX and KHST are compared by numerical simulation under SNCF accident scenario. Furthermore, to evaluate their crashworthiness under a typical real situation, the power cars are simulated for the accident collided against a deformable dump truck of 15 tons at 110 kph. The front structure of KHST, finally designed, shows a good crashworthy characteristics. Finally, the impact strength of coupling components is evaluated by analyzing a consist of the front three KHST units under scenario of train-to-train collision at 30 kph.
This paper describes a crashworthy design for the front structure of KHST (Korean High Speed Train) under the SNCF accident scenario (Collision against a movable rigid mass of 15 tons at 110 ㎞/h), The front structure designed in a new concept shows good behaviours in crashworthy point of view. It collapses in a progressive and well-controlled fashion. To evaluate the design by considering real situations, the power-car is simulated for accidents collided against a dump truck of 15 tons at 110 ㎞/h. The front end structure of it shows a good response on crash worthiness.
For a good crashworthy design of train vehicles, it is essential to develop some design and analysis techniques for energy absorbing structures. This paper analyzes the front structure of TGV-K and suggests crashworthy design of Korea high speed train(KHST) using the accident scenario of SNCF(collision with a stationary rigid mass in motion of 15 ton at 110 ㎞/h). Specifically this reserch is concentrated on developing a well-designed protective headstocks using mullticell structures with cutouts to improve crashworthiness of KHST.
In this paper, numerically evaluated is the regulations for crashworthy design of the Korean standard urban train suggested by KRRI. The 4-car consist of K-EMU(Korean Electric Multiple Unit) train developed in recent is analyzed under various collision conditions such as normal coupling, heavy shunt, light and heavy collisions. The collision conditions are assumed as K-EMU collides against another stationary one at 5 kph, 10 kph, 25 kph and 32 kph. According to the numerical results and bibliographical study, it is necessary that the regulations by KRRI be complemented from crashworthy point of view. Furthermore, the K-EMU train is recommended to adopt a new coupler with an additional energy absorber or a mechanical fuse.
In this paper, an engineering database management system(EDMS) has been developed to support the system engineering for design of the high speed titling train to be put into the conventional lines. The developed system can be operated on client-server or web circumstances. To accomplish the concurrent engineering in design of the rolling stocks, this system has been fully equipped with a powerful viewer and a postprocessor for 3D CAD data or FE results. The system was tested using the engineering data produced during carrying out the G7 project to design KHST(Korean High Speed Train) in a crash worthy viewpoint. Through this example, it is shown that the system should be powerfully applied to improving the performance of the system engineering.
In this study, an aluminum electric motor car with a modular front end made of composite materials is numerically evaluated applying the standard specifications for the urban EMU(Electric Multiple Unit) train. Structural analyses under compressive load, torsional load and free vibration satisfy the standard specifications, but analysis under normal load doesn"t. By the way, the aluminum body shell of the car except the modular front end is almost same to that of the Korean standard EMU, which satisfy the standard specifications. It is presumed that the stiffness of the modular front end made of composite materials haves some influence on the strength of the aluminum bodyshell.
This paper evaluates crashworthiness of KHST carbodies under the SNCF accident scenario(collision against a movable rigid mass of 15 tons at 110 kph) and the scenario of train-to-train collision at 30 kph. The numerical results show that the final design of the KHST power-car doesn"t have a good response on crashworthiness. So an improved design has been suggested for it. The improved design has shown good performances in the viewpoint of energy absorption and survival space at several numerical simulations, such as the accident collided against a deformable dump truck of 15 tons at 110 kph, the driver"s dummy analysis, and the accident of train-to-train collision for the first three units at 30 kph.
Because a driver is located in the front end of KHST, he is most likely to be insured at collision accidents. So, it is very important to design some survival space for the driver. To evaluate the driver"s safety of KHST (Korean High Speed Train), the front structure of power car is analysed using PAMCRASH under the SNCF accident scenario(collision against a movable rigid mass 15 ton at 110 ㎞/h). Because the driver"s cab of KHST is a modified version of TGV-K, which is not so strong as to protect him, it turns out to be inadequate to guarantee his survival space. Therefore it is recommended to redesign the driver"s cab in a crash worthy point of view like the case of TGV-Duplex or NEC.