不均匀飞机轮载作用下沥青道面结构力学响应  

Mechanical response of asphalt pavement structure under non-uniform aircraft wheel load

作　　者：游庆龙[1] 黄之懿 马靖莲 赵志 毕洁夫 YOU Qinglong;HUANG Zhiyi;MA Jinglian;ZHAO Zhi;BI Jiefu(College of Highway,Chang’an University,Xi’an 710064,China;College of Management,Xi’an University of Finance and Economics,Xi’an 710000,China;Chief Engineer Office,AVIC-KDN Airport Engineering Co.,Ltd.,Beijing 100621,China;MOE Engineering Research Center of Highway Infrastructure Digitalization,Chang’an University,Xi’an 710064,China)

机构地区：[1]长安大学公路学院,西安710064 [2]西安财经大学管理学院,陕西西安710000 [3]中航凯迪恩机场工程有限公司总工办公室,北京100621 [4]道路基础设施数字化教育部工程研究中心,长安大学,西安710064

出　　处：《振动与冲击》2023年第1期292-300,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金项目资助(51308064)。

摘　　要：为了研究不均匀飞机轮载作用下沥青道面结构力学响应,基于机轮条纹状接触面积假设和轮胎花纹,确定了轮胎的竖向应力函数,再结合已有研究确定了轮胎的纵、横向接触应力,计算获得了A380-800,B747-400,B777-300ER三维非均布接触应力;基于三维有限元分析模型,得到飞机三维非均布轮载作用下的道面结构力学响应,并分析了三种机型的力学响应的差异。研究结果表明:在三维非均布荷载作用下沥青道面的力学响应大于在均布竖向荷载下的力学响应;荷载的不均匀性对于沥青道面力学响应的影响沿沥青道面面层向土基逐渐减小;在三维非均布荷载作用下,沥青道面的力学响应受飞机的最大滑行质量、起落架构型、胎压、机轮个数等因素影响;随着沥青混合料模量增大,各力学响应参数的变化率也逐渐减小。Here,to study mechanical response of asphalt pavement structure under uneven aircraft wheel load,vertical stress function of tire was determined based on assumptions of striped contact area of wheel and tire pattern,and longitudinal and transverse contact stresses of tire were determined in combination with existing studies.3-D non-uniform contact stresses of planes A380-800,B747-400,B777-300ER were calculated and obtained.Based on 3-D finite element analysis model,mechanical responses of pavement structure under 3-D non-uniform aircraft wheel loads were obtained,and differences of mechanical responses of the above 3 aircraft types were analyzed.The results showed that mechanical response of asphalt pavement under 3-D non-uniform load is larger than that under uniform vertical load;effects of load non-uniformity on mechanical response of asphalt pavement decreases gradually from asphalt pavement to soil foundation;under action of 3-D non-uniform load,mechanical response of asphalt pavement is affected by the maximum taxiing mass of aircraft,landing gear type,tire pressure,number of wheels and other factors;with increase in asphalt mixture modulus,the variation rate of each mechanical response parameter decreases gradually.

关 键 词：机场工程 不均匀荷载 沥青道面 有限元分析 力学响应 

分 类 号：U416.223[交通运输工程—道路与铁道工程]