基于无网格法的沥青路面三维瞬态温度场和车辆荷载耦合

Coupling of 3D Transient Temperature Field with Vehicle Load for Asphalt Pavement Based on Meshless Method

无网格法是近年来迅速发展的一种新型数值计算方法,但目前沥青路面结构温度场和应力场的计算分析多采用有限元方法。为了将无网格法应用到该领域,基于变分原理推出了沥青路面瞬态温度场和应力场计算的无网格法公式,采用罚函数法处理本质边界条件。针对工程实例,编制了无网格法程序,建立数值计算模型并进行模拟分析。计算结果与现场实测数据和有限元分析结果吻合较好,且计算精度高于有限元方法。结果表明无网格法应用于沥青路面结构温度场和应力场的计算分析是可行的,供工程技术人员参考。

The meshless method is a new type of numerical method with rapid development in recent years,but nowadays the computation of temperature field and stress field of asphalt pavement mostly adopts finite element method.To apply the meshless method to this issue,based on variational principle,the meshless method formulation for calculating asphalt pavement transient temperature field and stress field was put forth,and the essential boundary condition was treated by penalty function method.As for application in real engineering case,the meshless method based program was composed and the numerical model was established for simulation and analysis.The computation result is in good agreement with measured values and FEM result,meshless method is better than FEM in accuracy.The results indicate that the meshless method is capable of simulating and analysing temperature field and stress field of asphalt pavement.