Research on the Nonlinear Damping Characteristics of Foam-filled All-composite Honeycomb-core Sandwich Panels

doi:10.3901/JME.260380

Abstract

Abstract: A theoretical model for predicting the nonlinear damping characteristics of foam-filled all-composite honeycomb-core sandwich panels (FF-ACHCSP) is presented. Firstly, the theoretical framwork of the structure is established by combining Reddy’s high-order shear theory with Hamilton's principle. Subsequently, the energy equations of the FF-ACHCSP structure are solved by the finite element method, and the nonlinear damping is expressed using the complex modulus method. Finally, a comprehensive theoretical model is developed, enabling the determination of natural frequencies, mode shapes, modal damping ratios, and frequency response curves of the FF-ACHCSP structure. To validate the accuracy of the theoretical model, a vibration testing system is set up, and experimental specimens are prepared for vibration testing. The results from both approaches agree well, confirming the accuracy of the theoretical method. Finally, to further optimize the structure, this study investigates the influence of filler density, honeycomb cell wall thickness, and wall width on the damping characteristics of the FF-ACHCSP structure. The theoretical model proposed accurately predicts the damping characteristics of the FF-ACHCSP structure, providing guiding suggestions for the practical application of this type of structure.

Key words: honeycomb-core, all-composite sandwich panels, nonlinear damping, finite element method

CLC Number:

TB535

XU Zhuo, YAO Nan, GU Dawei, TAN Dapeng, LI Hui, WEN Bangchun. Research on the Nonlinear Damping Characteristics of Foam-filled All-composite Honeycomb-core Sandwich Panels[J]. Journal of Mechanical Engineering, 2026, 62(7): 308-323.

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URL: http://www.cjmenet.com.cn/EN/10.3901/JME.260380

http://www.cjmenet.com.cn/EN/Y2026/V62/I7/308

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