基于道面响应的飞机荷载作用次数计算方法

对力学-经验法道面结构设计中的飞机交通荷载分析方法进行研究,探讨荷载重复作用次数的计算方法.以Monismith提出的通用铺面设计概念为基础,结合道面结构的疲劳开裂和轮辙损坏模式,分别推导荷载重复作用次数的分析方法.针对疲劳开裂分析,详细给出了单轴单轮的应力和应变重复作用次数计算公式;并根据实际的多轴起落架,建议了考虑多轴影响的荷载重复作用次数分析方法;结合A380等复杂起落架构型,提出了适应新一代大型飞机复杂起落架的荷载重复作用次数计算方法.对于轮辙分析,柔性道面的荷载重复作用次数计算方法与疲劳分析类似;半刚性道面的荷载重复作用次数计算方法可结合飞机轮载的最大通过位置和总荷载时间综合确定.

Aircraft Load Repetition Calculation Methods Based on Pavement Responses

Methods of aircraft repeat load analyses are discussed in this paper, which are used in mechanistic-empirical pavement design procedure.According to the general pavement design concept advanced by Monismith,the load repetition calculating methods for fatigue and rut analysis are put forward based on a study of the spatial pavement responses.For fatigue analyses,the specific formulas of single axle about stress and strain repetition are put forward,along with the load repetition calculating methods under the impact of mutiple axles.Based on a study of A380's complex gear,the calculating methods for the new generation large aircraft are proposed.The load repetition calculating methods of flexible pavement for rut analyses are similar to that for fatigue analysis.For the semi-rigid asphalt pavement,its load repetition calculating methods can be established according to the maximum trace trip and total loading time.