Impact Force Identification of CFRP Structures Using Experimental Transfer Matrices
Impact Force Identification of CFRP Structures Using Experimental Transfer Matrices
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DOI：
10.3970/cmc.2011.026.067
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发表时间：
2011-11
影响因子：
3.1
通讯作者：
S. Atobe;H. Fukunaga;N. Hu
中科院分区：
文献类型：
--
作者：
S. Atobe;H. Fukunaga;N. Hu
本文提出了一种识别CFRP结构（如层合板和加筋板）上冲击力的位置和力历程的方法。识别方法是一种实验方法，不使用任何结构的分析模型。在这里，实验传递矩阵，其中涉及的PZT传感器的相应响应的冲击力，用于识别的冲击力。传递矩阵的初步构造从冲击试验获得的脉冲锤的测量数据。为了识别撞击位置，使用弯曲波到达PZT传感器的时间，并且使用模拟带通滤波器来获得具有指定频率的波。根据冲击试验结果，通过实验确定了波速。通过CFRP层合板和CFRP加筋板的冲击载荷识别，验证了该方法的有效性。结果表明，该方法可以准确、快速地识别出冲击力的位置和力历程。
This paper presents a method for identifying the location and force history of an impact force acting on CFRP structures such as laminated plates and stiffened panels. The identification method is an experimental one without using any analytical model of the structure. Here, experimental transfer matrices, which relate the impact force to the corresponding responses of PZT sensors, are used to identify the impact force. The transfer matrices are preliminarily constructed from the measured data obtained by impact tests with an impulse hammer. To identify the impact location, the arrival times of the flexural waves to the PZT sensors are used, and an analog band-pass filter is used to obtain waves with a specified frequency. The wave velocity is determined experimentally from impact test results. The present method is verified experimentally by performing impact force identification of CFRP laminated plates and CFRP stiffened panels. The results reveal that the location and force history of the impact force can be identified accurately and rapidly using the present method.