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采用有限元软件ANSYS,建立连续梁桥上有砟轨道无缝道岔的线-桥-墩一体化有限元模型,分析在不同工况下,设置钢轨伸缩调节器的无缝道岔受力和变形的分布规律。通过对不同工况下的基本轨纵向力、基本轨伸缩位移的计算结果进行对比分析,得出距岔前钢轨伸缩调节器60 m以上,基本上消除其对道岔纵向稳定性的影响;距岔后钢轨伸缩调节器45 m以上,其对道岔纵向稳定性的影响可控制在3 mm内;岔后设置钢轨伸缩调节器优于岔前设置等结论。
The finite element model ANSYS is used to establish the integrated finite element model of the line-bridge-piers with continuous orbit on the continuous beam bridge. The stress and deformation of the seamless turnout with the rail extension and retraction regulator are analyzed under different operating conditions Distribution. By comparing the calculation results of the longitudinal rail longitudinal force and the basic rail telescopic displacement under different working conditions, the result shows that the rail telescoping regulator before the turnout is more than 60 m, basically eliminating its influence on the longitudinal stability of the turnout; After the rail extension and retraction regulator 45 m above, the impact on the longitudinal stability of the switch can be controlled within 3 mm; set after the fork rail extension and retraction regulator is superior to the conclusions set before the fork.