초록

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Abstract ▼ AI-Helper

The merit of conventional cylindrical metallic tube is to absorb kinetic energy in a controlled and irreversible manner so that damage to people, cargo with machinery is minimized. The laterally loaded cylindrical metallic tubes have formed a cluster of energy attenuators in existence to date such a...

The merit of conventional cylindrical metallic tube is to absorb kinetic energy in a controlled and irreversible manner so that damage to people, cargo with machinery is minimized. The laterally loaded cylindrical metallic tubes have formed a cluster of energy attenuators in existence to date such as CIAS(Connecticut Impact Attenuation System). This CIAS system is partly due to its easy constructibility and largely due to the excellent energy dissipation characteristics. However, this device designed for the worst case of a high speed impact involving a heavy vehicle might prove to be stiff for the light vehicles in terms of causing structural damage or decelerations beyond human tolerance levels. Alternatively, the nested tube system with thin walled component tubes can be used with the inner tubes being progressively activated as the crush progress. In this study, Taguchi method has been used to determine the optimal tube cluster system. The dynamic performance of the impact attenuation system with cylindrical steel nested tubes will be verified for not only a single unit system but also a cluster system by computer simulation to check whether it may be extended to practical device in the field. It is noted that the nested tube system shows better energy absorption characteristics than the conventional CIAS.

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