Nonlinear Vibration Characteristics of All-Composite Honeycomb-Core Sandwich Panel: Theoretical and Experimental Investigation

This study investigates the nonlinear vibration characteristics of all-composite honeycomb core sandwich panes (ACHCSPs) based on high-order shear deformation theory, Gibson equivalent theory, and Jones–Nelson–Hui nonlinear theory. In this model, the intermediate honeycomb layer is equivalently represented as a single layer of orthotropic material. The energy equation is established using the energy method, and the nonlinear vibration characteristics are determined using the Newton–Raphson method. To validate the model, experimental specimens of ACHCSPs are prepared, and an experimental platform is constructed for nonlinear vibration testing. Finally, the influence of honeycomb layer thickness, honeycomb unit wall thickness, and wall length on its nonlinear vibration characteristics is discussed. The results indicate that the proposed theoretical model can effectively predict the nonlinear vibration characteristics of ACHCSP. Additionally, within the allowable range, it is possible to appropriately increase the honeycomb unit wall thickness or decrease the wall length.