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根据路基变形的非线性及沥青路面具有明显粘弹性的特点,将沥青路面简化为非线性粘弹性地基上的粘弹性无限长梁,建立了移动载荷作用下非线性粘弹性梁系统动力响应数学模型。利用Adomian分解法和小波变换法得到求解稳态响应解析解的新方法。通过实际道路参数对沥青路面动力响应进行了数值仿真,研究了车速、车辆轴载、路面材料及温度对沥青路面动力响应的影响规律。结果表明该文提出的计算方法简便、快捷,是求解该类非线性动力响应问题的一种有效方法;非线性模型更能准确地反映重载及超载时沥青路面实际结构受力状态。
According to the nonlinear deformation of subgrade and viscoelasticity of asphalt pavement, the asphalt pavement is simplified as viscoelastic infinite beam on nonlinear viscoelastic foundation, and the dynamic response model of nonlinear viscoelastic beam under moving load is established . Adomian decomposition method and wavelet transform method are used to obtain a new method to solve steady state response analysis. The dynamic response of asphalt pavement is numerically simulated by the actual road parameters. The influence of vehicle speed, vehicle load, pavement materials and temperature on the dynamic response of asphalt pavement is studied. The results show that the calculation method proposed in this paper is simple and fast, which is an effective method to solve this kind of nonlinear dynamic response problem. The nonlinear model can more accurately reflect the actual state of the asphalt pavement under heavy load and overload.