充气压力对空气衬垫缓冲防护性能的影响研究

发布时间：2018-02-08 19:10

本文关键词： 空气衬垫充气压力薄膜变形缓冲性能冲击试验　出处：《振动与冲击》2016年20期 　论文类型：期刊论文

【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7.5 kg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20 k Pa,冲击载荷峰值降低10%以上。
[Abstract]:In order to analyze the effect of inflatable pressure on the cushion and protection performance of air cushion, the tensile deformation of air cushion film and the compression deformation of air chamber were synthesized. The impact compression mechanics model of air cushion is established. The analysis shows that the overall effect of increasing inflatable pressure is to make the dynamic stiffness of air cushion. The reason is that the inflatable pressure will increase the tensile deformation of the air cushion film during the impact process, and the volume of the air cushion will decrease compared with V _ 0 / V _ t. The volume ratio is a higher order term than the inflatable pressure in the dynamic stiffness model. Based on the analysis of the energy absorption mechanism of the elastic deformation of the air cushion, it is shown that the elastic deformation of the air cushion film can prolong the impact load action time and the energy absorption time. So as to improve the cushioning and protection performance of air cushion. The impact test of air cushion with 7.5 kg weight hammer with different inflatable pressure and chamber width shows that: under the condition that the elastic limit of film is not exceeded, Increasing the inflatable pressure of the air cushion can reduce the peak value of the impact load and improve the cushion and protection performance of the air cushion. The peak value of the impact load decreases by more than 10% for every 20 kPA increase of the inflating pressure.
【作者单位】：哈尔滨商业大学轻工学院;北京塔西尔悬架科技有限公司;哈尔滨卷烟厂;
【基金】：黑龙江省教育厅科学技术研究项目(12521130);黑龙江省教育厅研究生创新基金项目(YJSCX2011-179HSD)
【分类号】：TB485.2

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