Abstract: The vibration response of fiber-reinforced cantilever composite thin plate in thermal vibration environment is analyzed based on theory and practice. With consideration of the influence of base excitation load, a theoretical model of cantilever composite thin plate is established, and the vibration responses are obtained by the two-dimensional beam function method. The theoretical model of composite thin plate is modified based on the measured natural frequencies, damping ratio and modal shapes at room temperature, so that the material parameters, such as elastic modulus and loss factor, can be accurately obtained, and the vibration response can be calculated by the modified theoretical model. TC500 fiber/ epoxy composite plate is taken as an object of study, and its vibration responses are measured using the established vibration test system in thermal vibration environment. The measured results show that the error between theoretically calculated result and experimental result is in the range from 1.4% to 12.5%, thus verifying the effectiveness of the proposed theoretical method. Key

Key words: thermalvibrationenvironment, fiber-reinforcedcompositethinplate, vibrationresponse, baseexcitation