滚轴式散索鞍受力特性与优化研究

Study on Force Characteristics and Optimization of Roller-type Anchorage Cable Saddle

采用有限元分析方法,对悬索桥滚轴式散索鞍的受力特性进行了深入研究。结果表明,滚轴接触应力在纵桥向呈锯齿状分布,横桥向则在中央位置出现最大接触应力,这与散索鞍的横肋和纵肋分布密切相关。经过结构优化,滚轴接触反力和横向接触应力的变化范围均显著缩小。此外,最大剪切应力和最大von Mises应力出现在滚轴接触表面下约3 mm处,符合赫兹接触理论。基于这些发现,建议采用调质处理的合金钢作为滚轴材料,并根据不同类型的最大应力值进行材料屈服强度和表面硬度的设计,为悬索桥滚轴式散索鞍的设计和优化提供了重要理论依据。

The finite element analysis method is employed to conduct an in-depth study on the force characteristics of the roller-type anchorage cable saddle in suspension bridges.The results indicate that the roller contact reaction force exhibits a serrated distribution in the longitudinal direction of the bridge,while the maximum contact stress occurs at the central position in the transverse direction,which is closely related to the distribution of transverse and longitudinal ribs of the anchorage cable saddle.After structural optimization,the variation ranges of both the roller contact reaction force and the transverse contact stress are significantly reduced.Furthermore,the maximum shear stress and von Mises stress are found to occur at a depth of approximately 3 mm below the roller contact surface,which is consistent with Hertzian contact theory.Based on these findings,it is recommended to use quenched and tempered alloy steel as the roller material and to design the material yield strength and surface hardness according to different types of maximum stress values.This study provides an important theoretical basis for the design and optimization of roller-type anchorage cable saddles in suspension bridges.