扭曲不平顺对双块式轨道动力特性的影响分析

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摘要研究目的：扭曲不平顺作为一种轨道几何形位的不平顺，对行车平稳性、安全性及舒适性造成不利的影响。本文基于车辆动力学有限元方法，以轮轨关系为联系纽带，将机车车辆、轨道作为一个整体大系统，应用计算机数值仿真的方法并借助于通用大型有限元动力学分析软件ANSYS/LS-DYNA建立包含轨道扭曲不平顺的车辆一双块式元砟轨道垂向全车耦合模型，研究扭曲不平顺幅值对双块式无砟轨道动力特性的影响，初步提出扭曲不平顺安全限值的建议值。

研究结论：(1)随着扭曲不平顺幅值的增加，车体、转向架、轮对、钢轨、道床板垂向加速度随之增加；在车辆一系、二系悬挂系统良好的减振效果下,车体加速度幅值不大，并不会对旅客舒适度造成太大影响；(2)从行车安全角度出发，建议将扭曲不平顺幅值限值为2 mm；(3)本文提出的扭曲不平顺限值对双块式无砟轨道设计有一定的参考价值，可对我国轨道几何形位的维修养护提供一定的理论指导。

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	高俊英

关键词 ：扭曲不平顺, 耦合模型, 动力特性, 幅值

Abstract：Research conclusions：(1)With the amplitude of the torsion irregularity increasing,the vertical accelerations of the Car-bodies,the bogies,the wheels,the rails and the slab are increasing.Under the good damping effect of vehicles ‘primary and second suspension systems,the amplitude of cal-bodies’ acceleration is not very large,SO the torsion irregularity cant make significantly effect on the comfort of passengers.(2)At the same time,from the viewpoint of the running safety,the amplitude of the torsion irregularity should not be more than 2mm.(3)The track torsion irregularity’s safety limit proposed in this paper can provide the valuable reference to the design of double-block ballastless track and also provide theoretical direction for the maintenance and repair of our country track geometry.

Key words： torsion irregularity coupling model dynamic characteristics amplitude

收稿日期: 2013-10-21

PACS:

U213

作者简介: 高俊英，1981年出生，女，工程师

引用本文:

高俊英. 扭曲不平顺对双块式轨道动力特性的影响分析[J]. 铁道工程学报, 2014, 31(3): 46-50.
GAO Jun-ying. Effect Analysis of Torsion Irregularity on the Dynamic Characteristics of Double-block Track. Journal of Railway Engineering Society, 2014, 31(3): 46-50.

链接本文:

http://tdgcxb.crec.cn/CN/ 或 http://tdgcxb.crec.cn/CN/Y2014/V31/I3/46

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