关键词: 不均匀变形, 平整度, 1/4 车模型, Simulink仿真, 评价系统

Abstract:

Uneven deformation of airport pavement has become increasingly prominent. Aircrafts have a greater vertical vibration response when glide through the uneven deformation path. At present, the normal nce of uneven deformation pavement has no clear standard. To solve this problem, a plane-road surface vibration equation is established based on two degrees of freedom aircraft-road surface vibration simplified model, choosing dynamic load factor limits as evaluation criteria and the simulation evaluation system of uneven deformation pavement is constructed based on vibration equation. Finally，representatives of the three aircraft taxiing speeds（0.2v₀，0.5v₀ and 0.8v₀）are selected meanwhile，simulation evaluation system is used to analyze to pavement flatness of corresponding rate. Results show that three kinds of representatives velocity amplitude （0.2v₀，0.5v₀ and 0.8v₀）at the maximum allowable deformation are 0.046 m，0.043 m and 0.021 m; maximum allowable pavement depressions are closely related to aircraft taxiing speed ragher than airport rank.

Key words: uneven deformation, roughness, quarter car model, Simulink simulation, evaluation system