直纹管外翻式构件设计与吸能特性研究  

Design and energy-absorbing properties of the everting components of straight corrugated tubes

作　　者：张建卓[1] 刘欢 王洁[1] ZHANG Jianzhuo;LIU Huan;WANG Jie(School of Mechanics and Engineering,Liaoning Technical University,Fuxin 123000,China)

机构地区：[1]辽宁工程技术大学机械工程学院,辽宁阜新123000

出　　处：《振动与冲击》2020年第9期49-56,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金(51574140)。

摘　　要：为提高防冲支架液压立柱的抗冲击性能,设计了一种能够与液压立柱结合使用的直纹管外翻式吸能构件,给出了评价吸能构件吸能特性的指标。采用能量法对直纹管外翻变形的阻力进行了理论推导,得到直纹管稳定翻管变形阻力计算公式。采用数值仿真方法对吸能构件的翻管变化过程、全程阻力变化趋势及能量吸收情况进行了研究,结果表明:翻管变形过程、阻力变化趋势与能量吸收情况相对应,稳定翻管变形时阻力恒定不变,能量线性增加。针对直纹管吸能构件进入稳定翻管变形阶段需要一定压缩距离的问题,提出了改进方法,改进后的吸能构件具有恒阻特性,推导的理论计算公式与仿真得到的稳定翻管变形阻力较好吻合,改变壁厚是得到所需变形阻力的一种有效办法。直纹管外翻式吸能构件具有稳定可重复的翻管变形模式,是较为理想的吸能构件。根据仿真结果对理论公式进行了误差分析与修正,修正后的理论公式对直纹管外翻式吸能构件设计具有指导意义。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.

关 键 词：直纹管构件 外翻 数值仿真 吸能特性 

分 类 号：TH114[机械工程—机械设计及理论]