Abstract:In order to improve the impact resistance of hydraulic columns,a kind of straight corrugated tube energy-absorbing component for its combined use with the hydraulic columns was designed.The evaluating indexes of energy-absorbing properties were given.The energy method was applied to derive the everting deformation resistance of straight corrugated tubes.The calculation formula for the stable everting deformation resistance of straight corrugated tubes was provided.The deformation process,the resistance trend and energy absorption of the components were studied by numerical simulation.The results show that the everting deformation process,the resistance trend and the energy absorption correspond to each other.When the straight corrugated tubes enter into the stable deformation stage,the resistance is constant and the energy increases linearly.Aiming at the problem that a certain compressing distance is required for the straight corrugated tubes to enter into the stable everting deformation stage, an improved method was proposed.The improved energy-absorbing components have the characteristic of constant resistance.The results by the theoretical formula are in good agreement with the deformation resistance obtained by simulation.Changing the wall thickness is an effective method to obtain the required deformation resistance.Straight corrugated tubes are an ideal energy-absorbing component with stable and repeatable deformation mode.According to the simulation results, the error analysis and the correction of the theoretical formula were carried out.The corrected theoretical formula has guiding significance for the design of straight corrugated tube energy-absorbing components.
张建卓,刘欢,王洁. 直纹管外翻式构件设计与吸能特性研究[J]. 振动与冲击, 2020, 39(9): 49-56.
ZHANG Jianzhuo, LIU Huan, WANG Jie. Design and energy-absorbing properties of the everting components of straight corrugated tubes. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(9): 49-56.
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