| 周向导波在不同连续性条件多层圆筒中的传播 |
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| 引用本文： | 张慧玲,何斌,宋林辉,尹晓春.周向导波在不同连续性条件多层圆筒中的传播[J].振动工程学报,2014,27(3). |
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| 作者姓名： | 张慧玲 何斌 宋林辉 尹晓春 |
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| 作者单位： | 南京工业大学力学部;南京理工大学理学院; |
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| 基金项目： | 国家自然科学基金资助项目(10872095);国防973项目支承项目(6131530111);2011年度省属高校自然科学基金资助项目(11KJB560001) |
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| 摘 要： | 通过对多层厚壁圆筒中周向导波频散曲线研究,发现周向导波在多层圆筒中传播时,会发生明显的频散现象和模态干涉现象,第1阶模态在高频时接近于无频散的Rayleigh面波。通过对不同连续性条件的多层筒与单层筒的频散曲线比较,以及筒的层数对频散曲线的影响,都充分说明了检测层间界面缺陷的周向导波应该集中在低阶模态上。最后对不同连续性条件多层筒的位移研究,最终推断出第2阶模态具有在层间界面附近集中能量的特征,可应用于层间界面缺陷的周向导波无损检测技术中。
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| 关 键 词： | 周向导波 多层圆筒 连续性条件 无损检测 界面缺陷 |
| 收稿时间： | 2013/1/22 0:00:00 |
| 修稿时间： | 2014/6/6 0:00:00 |
Guided circumferential waves in a multi-layered thick-walled hollow cylinder with different continuous conditions |
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| ZHANG Hui-ling,and.Guided circumferential waves in a multi-layered thick-walled hollow cylinder with different continuous conditions[J].Journal of Vibration Engineering,2014,27(3). |
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| Authors: | ZHANG Hui-ling and |
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| Affiliation: | Division of Mechanics,Nanjing University of Technology,Nanjing,Jiangsu Province,Division of Mechanics,Nanjing University of Technology,Nanjing,Jiangsu Province,Division of Mechanics,Nanjing University of Technology,Nanjing,Jiangsu Province,Mechanics Department,Nanjing University of Science and Technology,Nanjing,Jiangsu Province |
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| Abstract: | Guided circumferential wave propagation in a multi-layered thick-walled hollow cylinder is investigated. By the study of the dispersion curves of the guided circumferential waves, the phenomena of the frequency dispersion and mode interactions are found. The first wave mode approaches to the Rayleigh wave when the frequency tends to infinity. Whether the dispersion curves comparison between TSST,TWST,STST, SIST and SOST, or considering the thickness of cylinder, it can be found that the lower modes are useful to the non-destructive detection of the interfacial surface defects. By the study of displacement curves with different continuous conditions, it is further concluded that the second wave mode has larger energy distribution near the interface, so can be used to the non-destructive detection of the interfacial surface defects. |
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| Keywords: | guided circumferential waves multi-layered thick-walled hollow cylinder continuous conditions non-destructive testing interfacial surface defects |
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