充气压力对空气衬垫缓冲防护性能的影响研究

谷吉海1,田野1,高翔2,王慧1,王成文1,迟广志3

振动与冲击 ›› 2016, Vol. 35 ›› Issue (20) : 226-230.

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (20) : 226-230.
论文

充气压力对空气衬垫缓冲防护性能的影响研究

  • 谷吉海1,田野1,高翔2,王慧1,王成文1,迟广志3
作者信息 +

Research on the Buffer Protection Performance of the Air Cushion Caused by Inflation Pressure

  • GU Jihai1, TIAN Ye1, GAO Xiang2, WANG Hui1, WANG Chengwen1,CHI Guangzhi3
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摘要

为分析充气压力对空气衬垫缓冲防护性能的影响,综合空气垫薄膜材料的拉伸变形和气室的压缩变形,建立了空气垫的冲击压缩力学模型。分析表明增大充气压力的总体效果是将使气垫的动刚度、承受的冲击载荷下降。原因是增大充气压力将使气垫薄膜在冲击过程的拉伸变形增大,气垫的体积比V0/Vt减小,而体积比在动刚度模型中是比充气压力更高阶的项。结合空气垫的弹性变形吸能机理分析,表明气垫薄膜的弹性变形可延长冲击载荷作用时间和吸能时间,从而提高空气垫的缓冲防护性能。对不同充气压力和气室宽度的空气垫,用7.5Kg的重锤进行冲击试验,结果表明:在不超过薄膜弹性限值的前提下,增大气垫的充气压力可降低气垫承受的冲击载荷峰值,提高气垫的缓冲防护性能,充气压力每增加20KPa,冲击载荷峰值降低10%以上。

Abstract

To study the influence of the inflation pressure of air cushion and the deformation of thin film on the impact load, the model of air shock compression is established. The analysis result indicates that the general effect of the increasing inflation pressure is that the decrease of the dynamic stiffness and the impact load of air cushion. The reason is the increasing inflation pressure will make the air cushion film increases during the process of impact tensile deformation, and decrease the volume ratio of air cushion. The volume ratio is higher than inflation pressure in the model. Based on the energy absorption mechanism of the elastic deformation air cushion, the elastic deformation of air cushion film can improve the cushioning protective performance of air cushion by prolong the acting time of the impact load and the absorbing energy. The results of tests show that under the premise of plastic yield limit of the thin film, the increasing air cushion gas pressure can reduce the peak impact load of air cushion and improving the buffer protection performance of air cushion.The air pressure increases every 20 kpa that the peak impact load ruduces more than 10%.
 

关键词

空气衬垫 / 充气压力 / 薄膜变形 / 缓冲性能 / 冲击试验

Key words

Air cushion / Inflation pressure / Membrane deformation / Buffer mechanism / Impact test;

引用本文

导出引用
谷吉海1,田野1,高翔2,王慧1,王成文1,迟广志3. 充气压力对空气衬垫缓冲防护性能的影响研究[J]. 振动与冲击, 2016, 35(20): 226-230
GU Jihai1, TIAN Ye1, GAO Xiang2, WANG Hui1, WANG Chengwen1,CHI Guangzhi3. Research on the Buffer Protection Performance of the Air Cushion Caused by Inflation Pressure[J]. Journal of Vibration and Shock, 2016, 35(20): 226-230

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