沥青路面无网格力学模型与数值计算

MESHELESS MECHANICAL MODEL AND NUMERICAL COMPUTATION FOR ASPHALT PAVEMENT

  • 摘要: 力学计算是路面结构设计方法的关键技术,因此提出了一种基于无网格法的沥青路面力学模型与数值计算方法。无网格有限块法(FBM)使用背景块体来直接模拟路面层状结构,利用带自由边的块体来处理无限边界条件,从而可对路面结构的半空间层状体系模型进行求解。通过4个算例,并结合解析法、有限元法、边界元法等计算方法进行对比计算,验证了FBM求解路面力学问题的准确性和有效性。研究结果表明:FBM应用于路面力学计算,是一种精确、稳定、收敛的计算方法。相比于有限元法,FBM具有更高的计算效率。无网格FBM力学计算为沥青路面结构设计提供一种新的验算方法,并为路面工程研究发展了一种新的科学计算工具。

     

    Abstract: Mechanical computation is a key technology for the design of pavement structures, therefore a mechanical model based on meshless method and numerical computation method for asphalt pavement is proposed. The meshless finite block method (FBM) uses background blocks to directly simulate the layered structure of pavement, and uses blocks with free edges to handle infinite boundary conditions, thus can solve the half space layered model of road pavement. To verify the accuracy and effectiveness of the FBM in solving pavement mechanical problems, four numerical examples were computed, and some comparative solutions were considered which used analytical method, finite element method, and boundary element method. The research results indicate that the application of FBM in pavement mechanical computation is an accurate, stable, and convergent numerical method; compared with the finite element method, FBM has higher computational efficiency; the meshless FBM computation method provides a new verification method for asphalt pavement structure design, and develops a new scientific simulation tool for pavement engineering research.

     

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