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传统飞机地面动力学分析往往需要忽略飞机缓冲系统的非线性特征,并对飞机气动力作出简化假设,从而难以分析飞机的复杂运动状态;试验研究虽然直接有效,但费用高昂、实施困难.为克服上述问题,基于虚拟样机技术,利用ADAMS/Aircraft建立A320,A330和A380飞机全机模型,根据GB/T7031-1986提出的功率谱密度函数建立不同等级道面并进行滑跑仿真分析,结果表明飞机对道面的动态荷载与道面国际平整度指数(IRI)呈线性关系,随速率先增大后减小,并给出了不同IRI道面的动载系数计算公式.研究结果可为机场道面性能评估与维护及道面力学性能的研究提供参考.
Conventional aircraft ground dynamics analysis often neglects the nonlinear characteristics of the aircraft’s cushioning system and simplifies the aerodynamic forces of the aircraft to make it difficult to analyze the complex kinematics of the aircraft. Although experimental studies are direct and effective, they are costly and difficult to implement. The above problems, based on the virtual prototype technology, the use of ADAMS / Aircraft to build A320, A330 and A380 aircraft full aircraft model, according to GB / T7031-1986 power spectral density function to establish different levels of pavement and run simulation analysis, the results show that the aircraft The dynamic load on the pavement has a linear relationship with the international roughness index (IRI) of the pavement, and then increases as the speed increases first and then decreases, and gives the formula for calculating the dynamic load coefficient of the pavement with different IRIs.The results of the study can be used as the airport track Surface performance evaluation and maintenance and mechanical properties of pavement provide a reference.