Damping Properties of Sandwich Truss Core Structures by Strain Energy Method

2nd International Conference on Innovative Materials, Structures and Technologies

Wesolowski, M.^1 ; Rucevskis, S.^2 ; Janeliukstis, R.^2 ; Polanski, M.^3

Department of Structural Mechanics, Koszalin University of Technology, Koszalin, Poland^1

Institute of Materials and Structures, Riga Technical University, Riga, Latvia^2

Department of Advanced Materials and Technologies, Military University of Technology, Warsaw, Poland^3

关键词: Damping characteristics;    Damping performance;    Damping property;    Finite element software;    Modal characteristics;    Numerical predictions;    Pyramidal truss cores;    Sandwich panel structures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/96/1/012022/pdf
DOI  :  10.1088/1757-899X/96/1/012022

来源: IOP

【 摘 要 】

Sandwich panel structures with stiff face sheets and cellular cores are widely used to support dynamic loads. Combining face sheets made of carbon fibre reinforced plastics (CFRPs) with an aluminium pyramidal truss improves the damping performance of the structure due to viscoelastic character of CRFP composites. To predict the damping characteristics of the pyramidal truss core sandwich panel the strain energy method is adopted. The procedure for evaluating the damping of the sandwich panel was performed using commercial finite element software NASTRAN and MATLAB. Non-contact vibration tests were performed on the real sandwich panels in order to extract the modal characteristics and compare them with the numerical predictions.