摘要
基于粘贴于外部主体裂纹梁的压电陶瓷片导率的变化 ,实验提取出梁系统的弯曲模态频率 .建立了考虑压电陶瓷片影响的裂纹梁的特征方程 ,根据裂纹梁的固有频率的变化 ,采用剪切弹簧模拟裂纹的方法 ,进行了裂纹的识别 ,结果表明满足一定的识别精度 .
Based on the piezoelectric admittance measurement for the piezoelectric patches attached to the cracked beam, the natural frequencies of system can be obtained. By using the characteristic equation of cracked beam with patches on it,the crack location can be detected from the change of the frequencies.The experimental results show that the method gives a satisfactory precision.
出处
《实验力学》
CSCD
北大核心
2000年第1期60-67,共8页
Journal of Experimental Mechanics
基金
国家自然科学基金资助项目!(No .5 96 75 0 18)
日本文部省国际合作项目!(No .0 80 45 0 2 9)
关键词
裂纹识别
压电陶瓷片
压电导率
裂纹梁
detection of crack
piezoelectric patches
piezoelectric admittance
cracked beam
