Similarity Design Method and Experimental Study of Vibration Response of Composite Laminates in Thermal Environment

doi:10.3901/JME.2022.11.098

Abstract

Abstract: Aiming at the problems of difficulty, time consuming, high cost and high risk in the dynamic test of composite laminates in thermal environment, the SMLTE (Similarity method of laminates in thermal environment) method is proposed. Firstly, the theoretical model of vibration of cantilever laminated plate in thermal environment is established, and its natural frequency and modal shape are obtained by using the principle of minimum potential energy and Ritz method. The correctness of the numerical calculation method is verified by comparing with the calculation results in literature and ANSYS simulation results. Then, a set of scaling laws of natural frequencies, acceleration response and temperature of composite laminates are derived. The correctness of the deduced scaling laws is verified by taking the exact similarity laminates and the laminates with the stacking sequence distortion as numerical examples. Finally, the vibration response test system of laminated plates in thermal environment is built to verify the proposed similarity method. The results show that the dynamic scaling laws established by the proposed DSDLTE method can reproduce the natural characteristics and vibration response of the prototype structure, which provides a strong support for the model test of the composite plate in thermal environments.

Key words: composite laminate, thermal environment, similarity design, natural characteristics, vibration response

CLC Number:

TB123

LUO Zhong, ZHANG Xiaoxia, HE Fengxia, LI Hui, SHI Baolong. Similarity Design Method and Experimental Study of Vibration Response of Composite Laminates in Thermal Environment[J]. Journal of Mechanical Engineering, 2022, 58(11): 98-108.

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