In this research, the characterization test on nonlinear vibration of a fibre-reinforced composite thin plate is studied. First, in order to improve the efficiency and precision of the test, a laser scanning vibration system is designed and developed. Then, test methods and procedures of the harmonic distortion and nonlinear time-varying damping of such thin plates are proposed from the time-domain perspective. Corresponding test methods and procedures of nonlinear vibration properties such as the hard/soft stiffness and amplitude-dependent damping are also presented from the frequency-domain perspective. Finally, the TC500 carbon fibre/resin composite plate is selected as an example for the research to carry out a case study. Potential nonlinear vibration phenomena of such plates are characterized by the proposed test methods. It has been proved that the related test system and techniques adopted in this paper can provide an important reference for the establishment of the nonlinear vibration test methodology of fibre-reinforced composite structures.

中文翻译：

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纤维增强复合薄板非线性振动表征试验

本研究对纤维增强复合薄板非线性振动特性试验进行了研究。首先，为了提高测试的效率和精度，设计开发了激光扫描振动系统。然后，从时域的角度提出了此类薄板谐波失真和非线性时变阻尼的测试方法和程序。还从频域的角度介绍了非线性振动特性的相应测试方法和程序，例如硬/软刚度和振幅相关阻尼。最后，选择TC500碳纤维/树脂复合板作为研究实例进行案例研究。这种板的潜在非线性振动现象由所提出的测试方法表征。