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| 铝板中Lamb波检测的实验研究 | |
| 引用本文： | 陈军,李志浩,林莉,侯云霞,马清杰.铝板中Lamb波检测的实验研究[J].应用声学,2011,30(2):98-104. |
| 作者姓名： | 陈军 李志浩 林莉 侯云霞 马清杰 |
| 作者单位： | 1. 大连理工大学材料科学与工程学院,大连,116024 2. 沈阳沈鼓克莱德联合泵业有限公司,沈阳,110869 3. 赤峰市天华机械有限责任公司,赤峰,024076 |
| 摘 要： | Lamb波在传播过程中具有频散及多模态特性,若相关参数选择不当,会导致在实际应用中信号相互叠加而无法识别。本文基于Lamb波的频散曲线是其频散方程实数解分布的特点,采用二分法绘制了铝板中Lamb波的频散曲线、波结构曲线和入射角曲线。根据曲线选择S0模态的Lamb波对1mm厚铝板中不同类型的缺陷进行检测。实验结果表明,S0模态的Lamb波对裂纹型缺陷和贯穿型缺陷十分敏感,但对于裂纹型缺陷,其幅值变化并不与缺陷大小成线性关系,并且S0模态Lamb波的声场指向性十分集中,在偏离声束轴线时无法检测到缺陷。 |
| 关 键 词： | Lamb波 频散 波结构 模态 |
Experiment investigations of Lamb waves in an aluminum plate |
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| CHEN Jun,LI Zhihao,LIN Li,HOU Yunxia and MA Qingjie.Experiment investigations of Lamb waves in an aluminum plate[J].Applied Acoustics,2011,30(2):98-104. | |
| Authors: | CHEN Jun LI Zhihao LIN Li HOU Yunxia and MA Qingjie |
| Institution: | CHEN Jun~1 LI Zhihao~1 LIN Li~1 HOU Yunxia~2 MA Qingjie~3 (1 School of materials Science and Engineering,Dalian 116024) (2 Shenyang Shengu Clyde Union Pumps Company Limited,Shenyang 110869) (3 Chifeng Sky Machinery Company Limited,Chifeng 024076) |
| Abstract: | Lamb waves have dispersive and multi-modal characteristics during its propagation.In actual applications,the multi-modal signals overlap and the useful modes can not be identified if relevant parameters are not properly selected.The dispersion,wave structure and incident angle curves of Lamb waves in an aluminum plate are drawn with dichotomy based on the characteristics that the Lamb wave dispersion curve is the distribution of real solutions of a Lamb wave dispersion equation.S0 mode Lamb wave is selected... |
| Keywords: | Lamb wave Dispersion Wave structure Mode |
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