应力波在多层介质中传播特性数值分析
NUMERICAL SIMULATION ON STRESS WAVE PROPAGATING IN MULTI-LAYERED MEDIA
查看参考文献7篇
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文摘
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通过与相关文献结果的对比,在验证了数值模拟应力波传播可行性的基础上,比较了应力波通过3层花岗岩和夹层为泡沫铝的3层介质后,发现后者应力波幅值的衰减远大于前者,应变能增加为前者的1.6倍,证明了软夹层在研究的速度量级上对能量耗散具有显著作用;在入射波波长为3层介质总厚度1/2的条件下,当泡沫铝的厚度占总厚度约0.2时,得出了3层介质的应变能约为系统总能量的60%,此时入射波波长为泡沫铝厚度的2.5倍,组合介质获得较佳的衰减性能. |
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其他语种文摘
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The calculational results have been shown feasible by comparing with the experimental results from references. The stress peak value decreases significantly when the interlayer of granite is replaced by foamed aluminum in the three-layered granite media. Meanwhile, the strain energy becomes 1. 6 times as much as that of the original. It shows that the soft layer has an important effect on energy dissipation. In the condition of the ratio of impulse width of input stress wave to the thickness of three layered media being 1/2, and the foamed aluminum thickness occupies 0.2 of the total samples thickness, that is to say, the impulse width of input stress wave is 2.5 of the foamed aluminum thickness, the strain energy of the three-layered media accounts for approximately 60 percent of total energy. It is more ideal situation on stress attenuation. |
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来源
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弹道学报
,2004,16(3):28-32,38 【扩展库】
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关键词
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应力波
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衰减
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数值计算
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多层介质
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泡沫铝
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地址
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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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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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1004-499X |
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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:1691765
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参考文献 共
7
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