Lamb波损伤散射及损伤成像的模拟
Detection of Damages in Plates Based on Symmetric Lamb Waves
摘 要
Lamb波对称模态(S0模态)具有传播速度快、频散小的优点。基于Ansys瞬态动力学分析，模拟了铝板内S0模态的传播过程，并根据有限元模拟的位移云图，分析了损伤对S0模态传播的影响。在此基础上建立环形传感器阵列，通过损伤成像算法对损伤进行检测。
S0模态
有限元模拟
损伤检测
Lamb wave
S0 mode
Finite element simulation
Damage detection
Abstract
The symmetric Lamb wave mode S0 has the advantages of fast propagation velocity and low dispersion. The propagation of S0 mode in plate was simulated using transient dynamic analysis in ANSYS. Based on displacement contour results of finite element method(FEM), the affect of through-hole damage on S0 mode propagation was analyzed. A circular sensor array was built based on the finite element model. The damage was located using the damage image algorithm.
中图分类号 TG115.28
所属栏目 科研成果与学术交流
基金项目 国家自然科学基金资助项目(11074073);国家自然科学基金和神华集团有限公司联合资助项目(51134016);中央高校基本科研业务费专项资金资助项目
收稿日期 2011/10/7
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备注李鸿源(1985-)，男，博士研究生，主要研究方向为结构健康监测。
引用该论文: LI Hong-Yuan,XU Hong,TIAN Zhen-Hua. Detection of Damages in Plates Based on Symmetric Lamb Waves[J]. Nondestructive Testing, 2012, 34(9): 12～15
李鸿源,徐鸿,田振华. Lamb波损伤散射及损伤成像的模拟[J]. 无损检测, 2012, 34(9): 12～15
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【2】徐鸿，王冰，姜秀娟.超声导波用于管道缺陷检测的数值研究［J］.动力工程,2009,29(11):1018.
【3】王强，袁慎芳.复合材料板脱层损伤的时间反转成像监测［J］.复合材料学报,2009,26(3):99-104.
【4】刘增华，张易农，张慧昕，等.基于磁致伸缩效应在钢绞线中激励接收纵向导波模态的试验研究［J］.机械工程学报,2010,46(6):71.
【5】徐鸿，李鸿源，王冰.管道中具有累积效应的二阶谐纵向导波生成点的数值验证［J］.固体力学学报,2011,32(1):82-7.
【6】Cawley P, Lowe M J S, Alleyne D N, et al. Practical long range guided wave testing: applications to pipes and rail［J］. Materials Evaluation,2003,61(1):66-74.
【7】Rose J L, Avioli M J, Mudge P, et al. Guided wave inspection potential of defects in rail［J］. NDT & E International,2004,37(2):153-61.
【8】Wang C H, Rose J T, Chang F K. A synthetic time-reversal imaging method for structural health monitoring［J］. Smart Mater Struct,2004,13(2):415.
【9】Yu L, Giurgiutiu V. In situ 2-D piezoelectric wafer active sensors arrays for guided wave damage detection［J］. Ultrasonics,2008,48(2):117.
【10】Su Z Q, Wang X M, Cheng L, et al. On selection of data fusion schemes for structural damage evaluation［J］. Struct Health Monit,2009,8(3):223.
【11】Rose J, Nagy P. Ultrasonic waves in solid media［J］. The Journal of the Acoustical Society of America,2000(107):1807.
【12】Yang C H, Ye L, Su Z Q, et al. Some aspects of numerical simulation for Lamb wave propagation in composite laminates［J］. Compos Struct,2006,75(1):267.
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