Bird strike is a very complicated phenomenon and generally occurs during taking off or landing of the flights. It is a major threat to the aircraft and termed as soft body impact. The bird acts as a soft body and numerically analyzed as a hydrodynamic body. This paper investigates the bird strike phenomenon using the Lagrangian approach available in LS-DYNA. Bird-strike is modeled as a frontal impact on flat circular plate. Numerical simulation is carried out for understanding the effect of bird strike velocity, thickness of the plate and bird weight on the centre point displacement of the plate. The bird is modeled as a cylindrical fluid and the plate is modeled using elasto-plastic material. The results are analyzed and conclusions are presented in terms of centre point deflection, kinetic energy, and internal energy of the plate.

Keywords: Dynamics, Impact, Bird strike, Lagrangian approach, LS-DYNA.