Mechanical behavior of triangle-grid cylindrical structure under axial impact loads

作者：Lin Xiao Hu^*; Yang Qing Sheng

来源：Journal of Vibration Engineering, 2013, 26(5): 678-686.

• Cylindrical structure
• Deformation modes
• Energy absorption capability
• Energy absorption capacity
• Grid structures
• Impact
• Load-bearing capability
• Staggered arrangement

In order to investigate the dynamical deformation modes, load-bearing capability and energy absorption behavior under different conditions, the finite element models of grid cylindrical structures filled with stagger-arranged and regular-arranged triangular cells were established. The results indicate that the deformations of both grid structures with different arrangements are gradually concentrated to the impacted end with increasing the impact velocity, while cell wall thickness has little effect on deformation modes. The bearing capacity and stiffness of the staggered arrangement is larger than the regular arrangement because of the different deformation modes. At the lower impact velocity, the energy absorption capacities of the grid structures with different arrangements are approximately the same. With the impact velocity or the cell wall thickness increasing, both of the grid structures have stronger energy absorption capabilities and efficiencies, and the grid structure with stagger-arranged cells has better energy absorption capability than one with regular-arranged cells. Most of the energy absorbed by grid structure is converted into internal energy, while kinetic energy has a less proportion.

• 出版日期2013
• 单位北京大学