Numerical analysis for the dynamic deformation characteristics of the ballast subgrade on high-speed and heavy haul railway

作者：Dong Liang; Zhang Qianli; Cai Degou; Cheng Aijun; Ye Yangsheng

来源：China Railway Science, 2010, 31(2): 6-11.

• Ballast track
• Dynamic deformation
• Heavy haul railway
• High
• speed railways
• Inclination angles

With ABAQUS FE software, 3D FE dynamic models of the ballast track-subgrade system were developed to analyze the spatial dynamic stress of the subgrade, the lateral and longitudinal dynamic deformation of the subgrade surface and the shear strain under the loads of high-speed and heavy haul trains. Based on field condition, the reference points for analyzing the lateral and longitudinal dynamic deformation of the road shoulder were chosen at 30 cm inward from the ballast slope angle and at the ballast slope angle, respectively. The change law of the road shoulder inclination, which resulted from the dynamic deformation, along with the train speed, ballast thickness, surface bedding thickness and the modulus of bedding surface was studied. The results show that the lateral and longitudinal inclination angles increase with the increase of the train speed while decrease with the increase of the ballast thickness, the thickness and the modulus of the bedding surface. The maximal shear strain of the bedding surface is close to that of the bedding bottom, and the linear relationship between the maximal shear strain and maximal slope angle of the road shoulder is obtained.

• 出版日期2010