锻压技术

翻卷管吸能启动载荷的研究

英文标题：Research on starting load of inversion tube energy absorber

作者：郝林坡罗云华熊佳霖何斌意

分类号：TG376

出版年,卷(期):页码：2015,40(12):166-168

摘要：

针对碰撞安全的结构设计要求，以变形功法和塑性铰能量法为基础，对翻卷管吸能特性和启动载荷进行了力学分析和理论推导，提出3个启动载荷的理论计算公式，分析了影响启动载荷大小的工艺因素，然后对翻卷管进行了静态试验，得到载荷-位移曲线，最后利用有限元软件ABAQUS对设计的翻卷管进行动态的数值模拟和分析。试验和数值模拟结果表明：翻卷管的吸能曲线较为平稳，是理想的吸能元件，变形功法和塑性铰能量法推导的理论公式比经验公式更为准确，动态吸能过程中会出现载荷峰值，在吸能器设计阶段要充分考虑。

For the structure design requirement of crash safety, the energy absorption characteristics and starting load of inversion tubes were mechanically analyzed and theoretically deduced based on the deformation work method and the plastic hinge energy method. Three theoretical calculation models of starting load were proposed, and the technological factors influencing the starting load were analyzed. Further, the static experiment of inversion tube was performed to obtain the curve of load-displacement. At last, the dynamic energy absorbing process of the inversion tube was simulated by ABAQUS. The results show that the load-displacement curve of inversion tube is stable and the inversion tubes are ideal energy absorbers. The theoretical starting load calculated by deformation work method and plastic hinge energy method is more accurate than that calculated by empirical formula. Therefore, there is the peak of starting load in the dynamic energy absorbing process, which should take full consideration in the design stage of energy absorbers.

基金项目：

航空科学基金资助项目（20142979004）

作者简介：郝林坡（1987-），男，硕士研究生通讯作者：罗云华（1965-），男，博士，副教授

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