基于动刚度法的热环境下纤维增强聚合物基复合薄板抗振性能的退化

从动力学角度，提出了动刚度法来研究热环境下纤维增强聚合物基复合薄板的抗振性能退化特性。首先，考虑脉冲激励载荷的影响，利用能量法、板壳理论和振型叠加法等，实现了热环境下动刚度的理论求解。同时，总结和归纳了热环境下复合薄板抗振性能退化的分析流程，并以TC500碳纤维/树脂基复合薄板为例，通过对比理论与测试获得的动刚度、固有频率、阻尼和振型结果，证明了该动态指标的有效性和方法的可行性，可以利用该指标来量化评价复合薄板在热环境下的动态性能退化问题。 

Vibration-resistant performance degradation of fiber-reinforced polymer composite thin plate in thermal environment based on dynamic stiffness method

From the viewpoint of dynamics, dynamic stiffness method was proposed to study the vibration-resistant performance degradation properties of fiber-reinforced composite thin plate in thermal environment. Firstly, with the consideration of the effect of pulse excitation load, the dynamic stiffness values in thermal environment were solved by using the principle of energy method, plate and shell theory and modal shape superposition method. Meanwhile, the analysis process of vibration-resistant performance degradation of composite thin plate in high-temperature environment was summarized. In addition, a TC500 fiber/epoxy composite plate was taken as a study object, and through the comparison of dynamic stiffness, natural frequency, damping and modal shape results were obtained by the theoretical calculation and experimental test. The feasibility of the proposed method and the reliability of such a dynamic index have been verified, which can be used to quantitatively evaluate the dynamic performance degradation of composite thin plate in thermal environment.