Analysis and Simulation of Drop Dynamic for the Nose Landing Gear

The nose landing gear was chosen as subjects to investigate.The digital prototype was set in CATIA and used to establish the virtual prototype in ADAMS/Aircraft.The simulation model for landing gear drop test was set up.And the axial force of the shock absorber and the course force and axial force of tires were established.Then the drop simulations under the design weight landing conditions were given.The differences between the simulation and test results were less than 5%.Furthermore,the simulation under the reserve energy condition was also given.The tolerance of the parameters was also changed to evaluate the results.The differences between the results above and the test results were less than 5%.So the model could well simulate the drop test,lay a foundation for modification design and be worthy of engineering applications and references.