Effect prediction of stiffened-ring cylindrical shells subjected to drop mass impact

Abstract

This study focuses on the effect of lateral mass impact on ring-stiffened thin-walled cylindrical shell. Cylindrical shells were fabricated to validate the numerical modeling and analytical techniques, and drop tests were performed using a rigid spherical indenter. Next, stiffened-ring cylindrical shells with various structural size parameters were simulated using ABAQUS software. The relationships between the impact force, deformation displacement, and rebound velocity were established, on the basis of impact mechanics theory and simulation results. It derived fitting functions to analyse the relationship between the maximum load and maximum displacement of ring-stiffened cylindrical shell under dynamic mass impact. Based on the validation of the simulation model, the fitting function data were compared with the simulation results, and the functions showed a good accuracy. Besides, the parameters, mass ratio and stiffened-ring mass ratio were used to reflect the effect of the mass change in the ring-stiffened cylindrical shell. Furthermore, parametric studies on ring-stiffened cylindrical shell models were conducted to analyse the progressive impact responses.

Keywords

• Drop mass impact
• Stiffened ring
• Cylindrical shell
• Impact load
• Dynamic response
• Parametric studies