基于激光无损扫描的纤维增强复合材料参数测试仪研发

研发了基于激光无损扫描的纤维增强复合材料参数测试仪.首先，以纤维增强复合梁试件为例，实现了其固有频率和振动响应的理论求解.然后，选取合适的步长来构造材料参数的迭代向量，并详细介绍了纤维增强复合材料参数的辨识原理.进一步，基于复合梁试件的激振平台、激光扫描装置、信号发生及数据采集器等功能部件，完成了测试仪硬件结构的搭建，并对基于LabVIEW编写的软件及其各个模块的功能和测控优势进行了说明.最后，利用该仪器辨识获得了三个TC500碳纤维/树脂基复合梁试件在不同纤维方向对应的材料参数，并与厂家所给的相关结果进行了对比，偏差在0.63%~10.61%之间，证明了所开发的材料参数测试仪的可靠性及其算法的有效性.

Development of a Fiber-Reinforced Composite Material Parameter Tester Based on Laser Non-destructive Scanning

A material parameter tester of fiber-reinforced composite materials based on the laser non-destructive scanning technique is developed. Firstly， by taking the fiber-reinforced composite beam specimen as an example， the theoretical solutions of natural frequencies and vibration responses are deduced. Then， an appropriate step size is chosen to construct the iterative vector of the material parameters， and the theoretical principle for identifying the fiber-reinforced composite material parameters is explained in details. Next， the excitation platform， laser scanning device， signal generator and data acquisition device are utilized to establish the hardware structures， and the functions as well as the control and measurement advantages of the software and corresponding modules based on LabVIEW are also described. Finally， by using this instrument， the material parameters of three TC500 carbon fiber/resin composite beam specimens in different fiber directions are identified， which are also compared with the material results provided by the manufacturer. The results show that their deviations are in the range of 0.63%~10.61%， which is within an acceptable level. Therefore， the reliability of the developed composite material tester and the effectiveness of the related algorithm have been verified.