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| 板材厚度变化对Lamb波透射系数的影响 | |
| 引用本文： | 景永刚,张海燕,刘镇清.板材厚度变化对Lamb波透射系数的影响[J].声学技术,2006,25(1):26-29. |
| 作者姓名： | 景永刚 张海燕 刘镇清 |
| 作者单位： | 1. 中国科学院东海研究站,上海,200032 2. 上海大学通信与信息工程学院,上海,2000072 3. 同济大学声学研究所,上海,200092 |
| 摘 要： | 对Lamb波与厚度变化的板材之间的相互作用进行了分析。针对S0模式Lamb波入射情况,利用混合边界元模型计算了台阶状散射体的透射系数与厚度变化的关系,并进行了实验验证。结果表明S0模式的透射系数能够很好的反映板材的厚度变化,从而为该类材料的定量无损检测提供一定的理论支撑,在实际工业中具有重要的应用意义。 |
| 关 键 词： | Lamb波 混合边界元 二维傅里叶变换 |
| 文章编号： | 1000-3630（2006）-01-0026-04 |
| 收稿时间： | 2005-04-30 |
| 修稿时间： | 2005-04-302005-07-18 |
Influence of plate thickness variation on transmission coefficients of Lamb mode |
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| JING Yong-gang,ZHANG Hai-yan and LIU Zhen-qing.Influence of plate thickness variation on transmission coefficients of Lamb mode[J].Technical Acoustics,2006,25(1):26-29. | |
| Authors: | JING Yong-gang ZHANG Hai-yan and LIU Zhen-qing |
| Affiliation: | 1. Shanghai Acoustic Laboratory, Shanghai 200032; 2. School of Communication and Information Engineering Shanghai University, Shanghai 200072 ; 3. Institute of Acoustics, Tongji University, Shanghai 200092, China |
| Abstract: | Lamb wave testing technique receives much attention due to their high inspection efficiency compared with traditional bulk wave techniques.Since scattering and propagation of Lamb waves in e-lastic plates are not thoroughly understood,the Lamb wave nondestructive testing technique has not yet widely been applied.This paper investigates the interaction between lamb waves and the plate thick-ness variation.With S0 guided wave mode incidence,a hybrid boundary element method is used to calculate the transmission coefficient from step scatters.Theoretic predictions of transmission coeffi-cients and experimental results for S0 mode incidence are found to be in good agreement. |
| Keywords: | Lamb wave hybrid boundary element 2-D FFT |
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