多层介质对应力波传播特性影响分析

董永香; 黄晨光; 段祝平

doi:10.11858/gywlxb.2005.01.011

多层介质对应力波传播特性影响分析

doi: 10.11858/gywlxb.2005.01.011

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；
2.
中国科学院力学研究所，北京 100080

详细信息

通讯作者:
董永香

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出版历程
- 收稿日期: 2003-10-08
- 修回日期: 2004-07-03
- 发布日期: 2005-03-05

Analysis on the Influence of Multi-Layered Media on Stress Wave Propagation

1.
State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, CAS, Beijing 100080, China;
2.
Institute of Mechanics, CAS, Beijing 100080, China

More Information

Corresponding author: DONG Yong-Xiang

摘要

摘要: 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。
- 应力波传播 /
- 数值计算 /
- 多层介质 /
- 泡沫材料
Abstract: The influence of multi-layered media on stress wave propagation characteristics has been analysed 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 result, the energy and momentum of different layer are changed when stress wave propagates in the layered media. Comparing the media including foamed aluminium with the media including foamed concrete, it has been shown that foamed concrete can lead to the lower wave amplitude, but foamed aluminium can absorb the more energy than that of foamed concrete under the condition of low velocity impacts.
- propagation of stress wave /
- numerical simulation /
- multi-layered media /
- foamed material

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参考文献(12)

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