Impedance Analysis on Piezoelectric Smart Beam with a Crack Based on Spectral Element Method
Based on the direct and converse piezoelectric effects, piezoelectric ceramic (PZT) can be used as the electromechanical impedance (EMI) transducer for structural health monitoring.Impedance analysis of a pi ezoelectric smart beam with a crack and a single PZT sheet attached to is implemented in this paper.Spec tral element method (SEM) based onLaplace transformation is used to analyze the EMI response of a piezoe lectric smart Timoshenko beam, which has higher calculation accuracy and efficiency.In this analysis,whether the beam is cracked or not, it needs to be divided into only three spectral elements.The crack is simulated using spring models, and the EMI curves of piezoelectric smart beam with and without crack are calculated using SEM, respectively.From the analysis results, it is found that the peak position and ampli tude of the EMI curve have significant changes with the changes in depth of crack, especially in higher fre quency ranges.In order to verify the validity of the analysis results using SEM, some experimental results for intact smart beam are used for comparison.From the comparison one can find that the calculated results u sing SEM are coincident with experimental results.Therefore, it is concluded that the SEM based on Laplace transformation can be used to analyze the EMI responses of a piezoelectric smart beam effectively.
Hongyuan Song Dansheng Wang Hongping Zhu Weiping He Ming Li
School of Civil Engineering & Mechanics, Huazhong University of Science and Technology, Wuhan, China School of Civil Engineering & Mechanics, Huazhong University of Science and Technology, Wuhan, China Shenzhen Oceanpower Industrial Co., Ltd, Shenzhen, China
国际会议
哈尔滨
英文
797-802
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）