局部脉冲载荷作用下星形夹芯梁的动态响应

The dynamic response of star-shaped sandwich beam structure under local impulse load was studied. The local impulse load was simulated by the impact of aluminum foam bullets on the star-shaped sandwich beam. The finite element model of the foam aluminum bullets impacting the sandwich beam was established, and the experiment of the impact of the aluminum foam bullets on the star-shaped sandwich beam was carried outto verify the accuracy of the finite element model. The effects of initial velocity, thickness and cell wall thickness of foam aluminum bullets on the deformation of sandwich beam and energy absorption were studied by numerical simulation. The results show that the backplane deflection of the sandwich beam is linearly related to the initial velocity of the aluminum foam and the cell wall thickness, and is influenced by the thickness of the panel. The energy absorption of the sandwich beam is linearly related to the square of the initial velocity of the aluminum foam, and is influenced by the thickness of the panel and the thickness of the cell wall.