Numerical simulation of bird impact on helicopter blade

The bird impact test for full-size rotor is difficult because of working characteristics of the helicopter rotor.However,in the design process of crashworthy aircraft structure,bird impact test is the ultimate and the most effective verification method.Therefore it is quite necessary to study the test method for bird impact on helicopter blade.Arbitrary Lagrangian Eulerian(ALE) fluid-solid coupling method was adopted to simulate bird impact on rotating blade as well as on stationary one whose end was under concentrated loads,respectively.After comparison of numerical simulation results,it was found that dynamic response of blade under the above two states is quite approximate.This shows that static bird impact test adopting centralized loads instead of centrifugal ones can better simulate the test of bird impact on rotating blade,thus providing a reference method for research of bird impact on helicopter rotor.