基于遗传算法和目标回波特性的材料参数反演

doi:10.3969/j.issn.1000-1093.2013.10.017

兵工学报 ›› 2013, Vol. 34 ›› Issue (10): 1304-1310.doi: 10.3969/j.issn.1000-1093.2013.10.017

基于遗传算法和目标回波特性的材料参数反演

孙铁林, 孙辉

哈尔滨工程大学水声技术重点实验室, 黑龙江哈尔滨150001

收稿日期:2012-11-08 修回日期:2012-11-08 上线日期:2013-12-16
作者简介:孙铁林(1987—), 男, 博士研究生。
基金资助:
水声技术重点实验室基金项目(9140C200105120C2001); 中央高校基本科研业务费专项(HEUCF130502)

Parametric Inversion of Material Based on Genetic Algorithm and Target Echo Characteristics

SUN Tie-lin, SUN Hui

Science and Technology on Underwater Acoustic Laboratory, Harbin Engineering University, Harbin 150001, Heilongjiang, China

Received:2012-11-08 Revised:2012-11-08 Online:2013-12-16

摘要/Abstract

摘要： 推导了水下覆盖黏弹性材料矩形弹性板的Lamb 波频散方程,在黏弹性材料弹性模量确定条件下求解得到水下复合板在不同频率厚度积下Lamb 波传播的相速度和衰减系数。通过对水下覆盖黏弹性材料弹性板的回波测量实验,测量得到复合板在确定频率厚度积下前两模态的相速度和衰减系数,将实验结果代入Lamb 波在水下复合板中传播的频散方程,反演得到了黏弹性材料的弹性模量,复合板的相速度、衰减系数和黏弹性材料的弹性模量反演值与理论值吻合较好,实验误差低于4%,证明基于遗传算法和回波特性反演黏弹性材料弹性模量是可行的。

关键词: 材料检测与分析技术, Lamb 波, 频散方程, 反演, 弹性模量

Abstract: Dispersion equation of Lamb wave in underwater elastic plate coated with viscoelastic damping layers is derived, and the phase velocity and attenuation coefficient of Lamb wave propagating in the submerged composite plate at different frequency-thickness products are obtained under the condition of certain elastic modulus. The phase velocities and attenuation coefficients of the first two Lamb wave modes propagating in the composite plate at certain frequency-thickness product are measured by the echo measurement experiment of submerged elastic plate coated with viscoelastic damping layers, the elastic modulus of viscoelastic material is then inversed by substituting the experimental results into the dispersion equation. The results show that the phase velocity and attenuation coefficient of composite plate, and the inversed elastic modulus of viscoelastic material coincide with the theoretical values well, error in experiment less than four percent, it's proved to be feasible to inverse elastic modulus of viscoelastic material based on genetic algorithm and echo characteristic.

Key words: materials examination and analysis, Lamb wave, dispersion equation, inversion, elastic modulus

中图分类号:

TB564

孙铁林, 孙辉. 基于遗传算法和目标回波特性的材料参数反演[J]. 兵工学报, 2013, 34(10): 1304-1310.

SUN Tie-lin, SUN Hui. Parametric Inversion of Material Based on Genetic Algorithm and Target Echo Characteristics[J]. Acta Armamentarii, 2013, 34(10): 1304-1310.

参考文献

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基于遗传算法和目标回波特性的材料参数反演

Parametric Inversion of Material Based on Genetic Algorithm and Target Echo Characteristics

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