基于虚拟样机的飞机滑跑荷载

Taxiing Load Analysis of Aircrafts Based on Virtual Prototype

摘要:

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/T70311986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.

关键词:虚拟样机; 机场道面; 平整度; 动载系数

Abstract:

Traditional aircraft ground maneuver dynamic modeling always neglects the nonlinear characteristics of the shock absorbing system and makes simplifying assumptions on the aerodynamics. Thus, it is difficult to study complicated aircraft maneuvers. Experiment is direct and effective, but difficult to conduct and it’s cost is very high. A320, A330 and A380 virtual prototype models were developed in ADAMS/Aircraft and taxiing simulation was conducted by applying different roughness level of runway models which were generated according to the power spectral density equation in GB/T70311986. Simulation results show a good linear relationship between dynamic load and International Roughness Index (IRI), and magnitude of dynamic load increases firstly then decreases as taxiing speed increases. Moreover, dynamic load coefficient calculation formulas were proposed. The paper can be a reference for evauation, maintenance and mechanical properties research of airport pavement.

Key words:virtual prototype; airport pavement; roughness; dynamic load coefficient