| 王海英,赵德有.芯板垂向可压缩夹层板有限元建模及声辐射性能分析[J].,2010,(6):978-982 |
| 芯板垂向可压缩夹层板有限元建模及声辐射性能分析 |
| FE modeling and acoustic radiation performance analyses of sandwich plates with vertical compressible core |
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| DOI：10.7511/dllgxb201006025 |
| 中文关键词: 夹层板 有限元法 边界元法 声辐射 |
| 英文关键词: sandwich plate finite element method boundary element method acoustic radiation |
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| 中文摘要: |
| 针对以往夹层板理论大多忽略芯板的垂向应变这一不足，构造了一种考虑芯板垂向可压缩变形的夹层板位移模式，并推导了相应的有限元单元及控制方程，求解了夹层板动力响应，进而利用有限元结果通过边界元法求解了一定频率范围内的夹层板声辐射功率，分析了芯板几何物理参数对夹层板声辐射性能的影响．结果表明，考虑芯板垂向可压缩变形在夹层板声辐射性能研究中是合理的，也是必要的；在一定范围内增加芯板厚度、降低其弹性模量均可减小夹层板单点简谐激励下的声辐射水平． |
| 英文摘要: |
| Due to the neglect of vertical strain in most of sandwich plate theories, a new displacement model of sandwich plates with vertical compressible core is presented, and the finite element model and governing equation are derived for the harmonic response of sandwich plates. The acoustic radiation power of sandwich plate in a range of frequency is calculated by boundary element method based on the finite element method results. The effect of geometric and material parameters of the core on acoustic radiation performance is discussed. It is proved that the consideration of vertical compressible deformation for the core is reasonable and necessary in radiation analysis. The increase of thickness and the decrease of elastic modulus of core can reduce the acoustic radiation level of sandwich under single-point harmonic excitation within a certain range. |
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