CAJ | 학술논문

基于超声导波技术研究了板状结构的损伤检测。理论分析了平板中 Lamb 波的传播特点；利用有限元耦合场模拟方法模拟了平板中 Lamb 波的传播及裂纹对 Lamb 波的影响；根据有限元模拟结果，分析了裂纹尺寸对 Lamb 波传播的影响；为检测损伤的位置，建立了单激发端多接收端的压电阵列；结合概率成像算法，建立了损伤分布场，该分布场的成像结果直观地反映了损伤的位置和严重程度。
기우초성도파기술연구료판상결구적손상검측。이론분석료평판중 Lamb 파적전파특점；이용유한원우합장모의방법모의료평판중 Lamb 파적전파급렬문대 Lamb 파적영향；근거유한원모의결과，분석료렬문척촌대 Lamb 파전파적영향；위검측손상적위치，건립료단격발단다접수단적압전진렬；결합개솔성상산법，건립료손상분포장，해분포장적성상결과직관지반영료손상적위치화엄중정도。
Based on ultrasonic guided wave technique ,the damage detection for plates was studied . The characteristics of Lamb wave propagation were discussed herein .With the help of finite element coupling field simulation ,the wave propagation and wave interaction with crack damage of Lamb waves were simulated .From the simulation results ,the affection of crack size on Lamb wave propaga‐tion was analyzed .In order to quantify the locations and sizes of the damages ,a single-transmitter multi-receiver PZT array was employed .Combined with probability-based imaging method ,the dam‐age distribution of the plate could be obtained .The imaging results of this distribution can reflect the location and severity of the damage obviously .