Fiber-reinforced composites have excellent mechanical properties, good thermal stability, and capability on weight reduction, which are widely used in aeronautics, astronautics, automotives, naval vessels, and weapons industry.^1,2 Currently, there are a large number of such composite thin walled structures, such as solar panels, aircraft engine fan blades, and large wind turbine blades. The vibration problems of such composite blades and plates, such as an excessive vibration, wear and tear, and fatigue failure, have become more and more serious due to the frequent work in harsh environments, attracting an increasing number of researchers to solve these problems.^3,4 The mechanical property parameters of fiber-reinforced composite materials usually include longitudinal elastic modulus, transverse elastic modulus, in-plane shear modulus, Poisson ratio, and loss factor. Accurately identifying these mechanical property parameters is the basis of analyzing the natural property and vibration response of composite structures, which has an important engineering and academic significance in the field of theoretical analysis, dynamic design, fault diagnosis of composite structures, and so on.

中文翻译：

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频率响应函数近似法辨识纤维增强复合材料力学参数

纤维增强复合材料具有优异的机械性能、良好的热稳定性和减重能力，广泛应用于航空、航天、汽车、舰船、兵器工业等领域。^1,2目前此类复合材料薄壁结构数量较多，如太阳能电池板、飞机发动机风扇叶片、大型风力发电机叶片等。此类复合材料叶片和板材由于频繁在恶劣环境下工作，其过度振动、磨损、疲劳失效等振动问题日益严重，吸引了越来越多的研究人员致力于解决这些问题。^3,4纤维增强复合材料的力学性能参数通常包括纵向弹性模量、横向弹性模量、面内剪切模量、泊松比、损耗因子等。准确识别这些力学性能参数是分析复合材料结构的自然性能和振动响应的基础，在复合材料结构的理论分析、动力设计、故障诊断等领域具有重要的工程和学术意义。