摘要
高阶Lamb波模态的截止特性为大面积板壳类结构中腐蚀损伤的检测提供了一种有力的工具。研究高阶Lamb波在不同宽度、深度腐蚀损伤处的透射特性,可以为激励模态、频率的优化提供理论依据。基于有限元方法和单一模态激励技术,分析了略高于截止频率的A1高阶模态穿过腐蚀损伤后到达时间、透射幅值以及波包变形程度的变化,并研究了其随损伤尺寸增大而变化的规律,为探究基于高阶模态的损伤反演奠定了基础。
Cutoff characteristics of high order Lamb wave modes provide a powerful tool for detecting corrosion damages in large-area plate and shell structures.Studying transmission characteristics of high order Lamb wave modes at corrosion damages with different widths and depths can provide theoretical basis for optimizing excitation mode and frequency.Here,based on the finite element method and single mode excitation technology,changes of arrival time,transmission amplitude and wave packet deformation degree after A1 high order modes with frequencies slightly higher than the cutoff frequency passing through corrosion damage were analyzed,and their change laws with increase in damage size were studied to lay a foundation for exploring damage inversion based on high-order Lamb wave modes.
作者
陈飞宇
罗志
曹徐伟
CHEN Feiyu;LUO Zhi;CAO Xuwei(No.713 Institute,China Shipbuilding Industry Corporation,Zhengzhou 450015,China;Henan Provincial Key Lab of Underwater Intelligent Equipment,Zhengzhou 450015,China;School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;School of Mechanical Engineering,Hangzhou Dianzi University,Hangzhou 310018,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2023年第1期98-104,共7页
Journal of Vibration and Shock
基金
国家自然科学基金(52205151)
上海市青年英才扬帆计划资助项目(22YF1409900)。
关键词
LAMB波
高阶模态
截止特性
单一模态激励
腐蚀损伤
Lamb wave
high order modes
cutoff characteristics
single mode excitation
corrosion damage
