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以飞机荷载引起的附加应力与结构层自重应力的比值等于10%作为飞机荷载响应深度的判定标准,通过建立A380-800的主起落架模型和刚性道面的全宽度模型,采用数值计算来探讨面层模量、基层模量、垫层模量、土基模量、面层厚度、基层厚度、垫层厚度对A380-800响应深度的影响。结果表明:A380-800主起落架构型复杂,叠加效应显著,应将整个主起落架布置于道面进行响应深度的分析;道面结构层参数一定时,随着距土基顶面距离的增加,A380-800的附加应力呈非线性减小;垫层厚度和模量对A380-800响应深度影响甚微,基层厚度和面层模量对A380-800响应深度影响较小,面层厚度和基层模量对A380-800响应深度影响较大,土基模量对A380-800响应深度影响显著。
Taking the ratio of the additional stress caused by aircraft load and the self-weighting stress of structural layer equal to 10% as the criterion for determining the depth of aircraft load response, a numerical calculation was conducted to establish the main landing gear model of A380-800 and the full width model of rigid pavement. The influence of surface layer modulus, base layer modulus, cushion modulus, soil base modulus, surface layer thickness, base layer thickness and cushion thickness on A380-800 response depth was studied. The results show that the structure of A380-800 main landing gear is complex and the superposition effect is significant. The whole main landing gear should be placed on the pavement to analyze the response depth. When the parameters of pavement structure layer are fixed, with the distance from the top of the earth foundation The additional stress of A380-800 decreases nonlinearly. The thickness and modulus of cushion have little effect on the response depth of A380-800. The effect of base thickness and surface modulus on the response depth of A380-800 is small, And base modulus have a greater impact on the response depth of the A380-800, and the influence of the soil modulus on the response depth of the A380-800 is significant.