多层介质对应力波传播特性影响分析
Analysis on the Influence of Multi-Layered Media on Stress Wave Propagation
查看参考文献11篇
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文摘
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通过在气炮上进行多层介质的低速冲击实验及相应的数值计算,分析了不同组成的多层介质对应力波传播特性的影响.结果表明:多层介质中的泡沫材料不仅能够改变应力波的幅值与作用时间,而且具有显著的吸能效果,引起应力波在传播过程中在各层介质中能量与动量分配的改变.通过对泡沫铝和泡沫混凝土两种软材料在多层介质中作用的比较表明,在低速冲击的实验条件下,含泡沫混凝土的多层介质具有较好的削波作用,含泡沫铝的多层介质具有较好的吸能性能. |
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其他语种文摘
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The influence of multi-layered media on stress wave propagation characteristics has been ana-lysed by the low velocity impact experiments and the corresponding numerical simulation. It shows that the wave amplitude and the actuation time are both affected by foamed materials in the layered media, and the energy absorption of multi-layered media with the foamed materials is obvious. As a re-sult, the energy and momentum of different layer are changed when stress wave propagates in the lay-ered media. Comparing the media including foamed aluminium with the media including foamed con-crete, it has been shown that foamed concrete can lead to the lower wave amplitude, but foamed alu-minium can absorb the more energy than that of foamed concrete under the condition of low velocity impacts. |
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来源
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高压物理学报
,2005,19(1):59-65 【核心库】
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关键词
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应力波传播
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数值计算
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多层介质
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泡沫材料
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地址
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1.
中国科学院力学研究所, 非线性力学国家重点实验室, 北京, 100080
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中国科学院力学研究所, 北京, 100080
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-5773 |
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学科
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力学 |
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文献收藏号
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CSCD:1876361
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