Investigation of vibration suppression performance of composite pyramidal truss sandwich cylindrical shell panels with damping coating

Vibration suppression performance of composite pyramidal truss sandwich cylindrical shell (CPTSCS) panels with damping coating (DC) is investigated in the present study. Firstly, a novel theoretical model under elastically supported boundary conditions subjected to base excitation is developed, which is based on the first-order shear deformation theory, combined with artificial spring technique, the Rayleigh-Ritz variational approach and the Duhamel integral method. The equation of motion of the DC-CPTSCS panels is deduced to obtain the free and forced vibration solutions, followed with the convergence investigation for determining an appropriate truncation number adopted in the future predictions. After these specimens with and without damping coating are fabricated, the detailed vibration tests are conducted to provide a reliable verification for this model. Also, the influence of key material and geometric parameters associated with damping coating, pyramidal truss core and composite face sheets on vibration properties are discussed in the parametric study, which provides some important advices to better exert vibration suppression capabilities of the DC-CPTSCS panels.

Automated summary

The vibration suppression performance of composite pyramidal truss sandwich cylindrical shell panels with damping coating (DC) is investigated in this study. A novel theoretical model is developed based on the first-order shear deformation theory, artificial spring technique, Rayleigh-Ritz variational approach, and Duhamel integral method. Vibration tests are conducted to validate the model, and a parametric study is performed to analyze the influence of key material and geometric parameters on vibration properties. The results provide important insights for enhancing the vibration suppression capabilities of the DC-CPTSCS panels.