| As an important part of helicopter, landing gear can ensure the stability of taxiing, absorb energyand reduce bump stroke for landing. Landing gear must satisfy the requirement of drop test ofhelicopter as well as solve the problem of helicopter ground resonance. Although the speed ofhelicopter taxiing is not very fast, it should consider the influence of landing gear shimmy to thestability of taxiing. The parameters of helicopter’s rotor also have big influence on the stability ofhelicopter ground resonance.In this paper, the landing gear’s reasonable distribution and configuration are selected based onthe requirement of helicopter design and the basic parameters of landing gear bumper and tire arecalculated. Helicopter’s landing gear dynamic model are built in LMS Virtual.Lab based on the wayto build model using virtual prototype technology, ensured and corrected by using drop test simulation.Tail landing gear shimmy stability during taxiing is studied. The influence of parameter is analyzedbased on the result of simulation. Analytical method and model are studied. Helicopter system’s dampand frequency changed with rotate speed are calculated based on the parameters of choose landinggear and rotor. Simulation of helicopter ground resonance is conducted based using LMS. Theinfluence of landing gear’s damp and stiffness and rotor’s damping are analyzed base on thesimulation result. |
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