Abstract：To solve the question of low computational efficiency of finite element method of double-block ballastless track structure, a simplified finite element (FE) model, i.e., K-G simplified beam model, is proposed to simulate the track structure. The method of adaptive Kriging model and the genetic algorithm are adopted to modify the simplified ballastless track model to obtain the structure parameters. And the results are compared to those of refinement ballastless track structure to verify the feasibility accuracy of the K-G simplified beam method. The K-G simplified model for the ballastless track is employed in a dynamic analysis of vehicle-track-bridge system for Hanjiang Bridge. The results show that the vertical displacement responses of double-block ballastless track simulated with the K-G simplified beam model agree well with those by the refinement FE model with the maximum relative error within 5%. The K-G simplified beam FE model of the ballastless track can be employed in the further dynamic analysis.
李永乐 鲍玉龙 向活跃. 基于代理模型的无砟轨道模拟方法及其在车-线-桥分析中的应用[J]. 土木工程学报, 2018, 51(5): 95-102.
Li Yongle Bao Yulong Xiang Huoyue. Simulation method and its application in dynamic analysis of vehicle-track-bridge system with ballastless track based on surrogate model. 土木工程学报, 2018, 51(5): 95-102.
