| 引用本文: | 王振,陈照波,焦映厚,刘旺中.轮轨横向接触系统的自激振动分析[J].哈尔滨工业大学学报,2011,43(9):56.DOI:10.11918/j.issn.0367-6234.2011.09.012 |
| WANG Zhen,CHEN Zhao-bo,JIAO Ying-hou,LIU Wang-zhong.Self-excited vibration analysis for wheel/rail lateral contact system[J].Journal of Harbin Institute of Technology,2011,43(9):56.DOI:10.11918/j.issn.0367-6234.2011.09.012 |
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| 摘要: |
| 为了研究轮轨接触过程中发生的自激振动现象对轮轨曲线啸叫噪声的影响,建立了轮轨横向接触系统的单自由度动力学方程,采用基于De Beer模型的改进的新型摩擦系数模型计算了轮轨接触面上的摩擦力变化,用相平面法分析了动、静摩擦系数以及横向蠕滑率对该自激振动系统的稳定性影响.计算结果表明:不稳定的轮轨自激振动会激发车轮的若干模态产生啸叫噪声;轮轨接触系统的结构阻尼大于因摩擦力变化而引起的等效阻尼,轮轨间横向蠕滑率小于0.002 4可以使该系统保持稳定,抑制啸叫噪声. |
| 关键词: 自激振动 蠕滑率 相平面 轮轨接触 |
| DOI：10.11918/j.issn.0367-6234.2011.09.012 |
| 分类号:TB533 |
| 基金项目:科技部科技人员服务企业行动项目(2009GJB20012) |
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| Self-excited vibration analysis for wheel/rail lateral contact system |
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WANG Zhen, CHEN Zhao-bo, JIAO Ying-hou, LIU Wang-zhong
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School of Mechatronics Engineering,Harbin Institute of Technology,150001 Harbin,China
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| Abstract: |
| To study the influence of self-excited vibration on the curve squeal noise in the wheel/rail contact,the dynamical equation for 1-DOF wheel/rail lateral contact system is derived.A new friction coefficient model based on De Beer model is adopted to calculate the friction force in the wheel/rail contact surface.The influence of kinetic and static friction coefficients as well as the lateral creepage on the stability of self-excited vibration system is investigated.The calculation results show that wheel’s inherent modes will be excited by the unstable self-excited vibration.If the structural damping of wheel/rail contact system is larger than the equivalent damping of the friction force,or the value of lateral creepage is less than 0.0024,the self-excited vibration system will be stable,and thus the curve squeal noise can be restrained. |
| Key words: self-excited vibration creepage phase plane wheel/rail contact |
