基于虚拟样机的飞机起落架着陆时的响应分析

通过建立弹性机体二质量块等效模型,联立飞机侧滑着陆时的补充方程,推导出起落架系统着陆动力学方程.结合建立的数学模型,利用虚拟样机技术,在ADAMS/Aircraft环境中建立具有弹性机体的飞机整机模型,模拟飞机在一点侧滑着陆时起落架系统的动态响应.仿真结果表明在一点侧滑着陆工况下,弹性机体能够增大回复滚转力矩,减小轮胎侧滑,使着陆飞机快速达到对称着陆状态.弹性机体能够吸收、耗散着陆时的冲击能,改善减震器性能,提高乘坐舒适性,为减轻起落架系统重量和进一步改进起落架系统奠定了基础. 

Analysis of landing response of virtual prototype landing gear

The landing dynamics equations were educed with the establishment of two-mass equivalent model and the supplementary equations under the sideslip landing.An aircraft model with flexible fuselage using virtual prototype was applied basing on the mathematical models of landing gear in landing and ADAMS/Aircraft version.A simulation of dynamic response under sideslip landing has been analyzed.Simulation results show that the flexible fuselage leads to the increase of returning roll torque and the decrease of the tires' sideslip.It leads to symmetrical landing fast.The flexible fuselage can absorb and dissipate the landing shock energy.The comfort of airplane can be improved and the weight of landing gear can be decreased.Then the foundation to ameliorate landing gear has been laid.