铁道标准设计
鐵道標準設計
철도표준설계
RAILWAY STANDARD DESIGN
2015年
2期
36-39
,共4页
高速铁路%无砟轨道%超高设置方式%力学特性
高速鐵路%無砟軌道%超高設置方式%力學特性
고속철로%무사궤도%초고설치방식%역학특성
High-speed railway%Ballastless track%Superelevation setting%Mechanical characteristic
利用有限元方法，分别建立空间耦合精细化静力模型及车辆-轨道-路基动力协同仿真模型，对路基曲线地段无砟轨道采用不同超高设置方式后的力学特性进行对比研究，为无砟轨道超高设置方式的合理应用提供依据。分析结果表明：(1)采用支承层设置超高可减小结构变形及支承层本身受力，但轨道板纵、横向应力会明显增大；(2)采用支承层设置超高时，超高量变化对无砟轨道受力变形影响较明显，结构纵、横向应力随超高量的增加而增大；(3)支承层设置超高具有较好的减振效果，无砟轨道结构动态变形较小。
利用有限元方法，分彆建立空間耦閤精細化靜力模型及車輛-軌道-路基動力協同倣真模型，對路基麯線地段無砟軌道採用不同超高設置方式後的力學特性進行對比研究，為無砟軌道超高設置方式的閤理應用提供依據。分析結果錶明：(1)採用支承層設置超高可減小結構變形及支承層本身受力，但軌道闆縱、橫嚮應力會明顯增大；(2)採用支承層設置超高時，超高量變化對無砟軌道受力變形影響較明顯，結構縱、橫嚮應力隨超高量的增加而增大；(3)支承層設置超高具有較好的減振效果，無砟軌道結構動態變形較小。
이용유한원방법，분별건립공간우합정세화정력모형급차량-궤도-로기동력협동방진모형，대로기곡선지단무사궤도채용불동초고설치방식후적역학특성진행대비연구，위무사궤도초고설치방식적합리응용제공의거。분석결과표명：(1)채용지승층설치초고가감소결구변형급지승층본신수력，단궤도판종、횡향응력회명현증대；(2)채용지승층설치초고시，초고량변화대무사궤도수력변형영향교명현，결구종、횡향응력수초고량적증가이증대；(3)지승층설치초고구유교호적감진효과，무사궤도결구동태변형교소。
A static spatial coupled model and a dynamic vehicle-track-subgrade coupled system model for ballastless track in curves are developed with finite element method to analyze mechanical characteristics of ballastless track with different curve superelevation settings in subgrade section, providing references for the proper application of curve superelevation setting. The results show that: 1 ) Where curve superelevation is set up with the supporting layer, the supporting layer stress and structural deformation are relatively smaller, but the longitudinal and lateral stresses increase sharply. 2 ) Where curve superelevation is set up with the supporting layer, the impact of the changes of curve superelevation on the stress and deformation of ballastless track is remarkable, and the structure longitudinal and lateral stresses increase with the increase of curve superelevation. 3)The setting of curve superelevation with the supporting layer has good vibration-reducing effect, and the dynamic deformation of ballastless track is smaller.
