具有褶皱薄弱段的正弦波纹梁吸能性能研究

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摘要薄弱环节的设置对波纹梁吸能性能的影响很大，好的薄弱环节可以降低波纹梁的冲击过载，从而降低结构传递给乘员的过载，并使波纹梁产生稳定的渐进压溃，以吸收更多的能量。提出了褶皱薄弱环节的概念，并对带有褶皱薄弱环节的波纹梁吸能性能进行了研究。首先，对具有弧形薄弱段的波纹梁进行了有限元仿真，验证了仿真分析方法的正确性。在此基础上，建立了带有褶皱薄弱段的正弦波纹梁的有限元模型，对波纹梁几何参数对其吸能性能、坠毁冲击时的最大加速度的影响进行了研究。研究发现：褶皱薄弱环节能够有效降低波纹梁的最大冲击载荷，且对波纹梁吸能性能的影响不大。以上研究结果对波纹梁在吸能结构中的应用具有一定的指导意义。

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关键词 ：波纹梁, 抗坠撞, 能量吸收, 薄弱环节, 几何参数

Abstract：

The trigger geometry has a great influence on the energy absorption property of waved beams. Reasonable design of trigger mechanism can reduce the impact load of waved beams, thus lead to the reducing of overload passed to the crews from the structure; and make the waved beam destroyed steadily and gradually, which means more energy absorption. The folded trigger geometry of waved beams is introduced and the energy absorption properties of waved beams with folded trigger geometry are studied. First, the FEM model of waved beams with arc trigger geometry is set up and the simulation method is proved to be correct. Then the FEM models of sine waved beam with folded trigger geometry are set up and the effects of geometric characteristics on the energy absorbing property, the maximum acceleration when suffering crash impact of the waved beam are studied. The peak impact load of waved beam can be effectively reduced by using the folded trigger geometry, and the energy absorption ability is almost unaffected. The results got can provide a reference in the application of the waved beams.

Key words： waved beams crashworthiness energy absorption trigger geometry geometric characteristics

收稿日期: 2016-08-12 出版日期: 2017-08-28

引用本文:

周华志 1,王志瑾 1,韩微 1,江彬彬 1 . 具有褶皱薄弱段的正弦波纹梁吸能性能研究[J]. 振动与冲击, 2017, 36(17): 248-254.
ZHOU Huazhi 1 WANG Zhijin 1 HAN Wei 1 Jiang Binbin 1. Study of the energy absorption capability of sine waved beam with folded trigger geometry. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(17): 248-254.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2017/V36/I17/248

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