파형관의 충돌안전도 해석 및 최적설계의 실험적 검증

초록

Corrugated tubes are widely used in energy-absorbing devices because the initial peak load is low, and the stability of the device is high. Since the performance of corrugated tubes depends on the shape, the performance can be improved by applying an optimal design technique. In this study, shape design optimization based on crashworthiness analysis was performed, and the results were verified experimentally. The diameter and thickness of a corrugated tube and the amplitude and wavelength of the waveform were considered as design variables. An optimal design problem that maximizes energy absorption was constructed with peak crush force as a constraint. Using a metal 3D printing technique, a corrugated tube was manufactured from 316L steel, and static and dynamic compression tests were performed. The reliability of the developed optimal design technique was confirmed by showing that the simulation results and the experimental results were similar. In addition, through a comparison of static and dynamic compression tests, it was confirmed that the crash behavior varies depending on the impact speed.

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