DAMPING LAYER OPTIMIZATION DESIGN OF VISCOELASTIC CO-CURING STRUCTURE

Li Haiyan, Xu Yang, Zhang Yaolei , Li Chengxiang , Wang Bin

ABSTRACT: In order to improve the dynamic environment of new weapons, viscoelastic co-curing composite is widely used. The damping layer optimization of co-curing structure is the key problem to structure design. First, by comparing three different modeling methods, finite element model was established by the three-plate modeling method. Then, using topology optimization combined with size optimization strategy, co-curing damping layer parameters optimization has been accomplished. Taking damping material unit density and composite layer thickness as design variables, the objective function is to make the structural dynamic response peak minimum, and damping material volume fraction and range of layer thickness are considered as constraint conditions. Finally, through the optimization analysis vibration reduction has been realized.

Keywords: Damping, Co-curing, Optimization, Vibration reduction