2B0机车车体低频横向晃动现象研究  

Study on Low-frequency Lateral Swaying of 2B0 Locomotive

作　　者：雷成[1,2] 王少聪 郭柏龄 马卫华[2] 董黎生[1] LEI Cheng;WANG Shaocong;GUO Bailing;MA Weihua;DONG Lisheng(Henan Engineering Research Center of Rail Transtit Intelligent Security,Zhengzhou Railway Vocational&Technical College,Zhengzhou 451460,China;State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China;City Rail Technical Development Department,CRRC Dalian Locomotive and Rolling Stock Co.,Ltd.,Dalian 116022,China)

机构地区：[1]郑州铁路职业技术学院河南省轨道交通智能安全工程技术研究中心,河南郑州451460 [2]西南交通大学牵引动力国家重点实验室,四川成都610031 [3]中车大连机车车辆有限公司城轨开发部,辽宁大连116022

出　　处：《铁道学报》2019年第11期42-49,共8页Journal of the China Railway Society

基　　金：国家自然科学基金(51575458)

摘　　要：为解决某2B0机车车体出现的低频横向晃动问题,分析等效锥度对低频横向晃动的影响,采用根轨迹法分析该车辆系统的振动特性,明确低频晃动产生的原因,最终提出整改措施。分析结果表明,较小等效锥度下转向架蛇行运动模态与车体固有的摇头、侧滚模态之间显著的耦合共振是低频晃动产生的主要原因,从减小抗蛇行减振器安装角度、减小轴箱纵向刚度和减小电机减振器阻尼等三个方面对机车进行综合整改,可以有效抑制转向架蛇行模态与车体固有横移模态之间的耦合共振,增加一次蛇行稳定性。非线性动力学计算及现场整改试验的结果均表明,机车在采用整改措施后基本消除了低频晃动,验证了分析的正确性。In order to solve the low-frequency lateral swaying of a 2 B0 locomotive, the influence of equivalent conicity on low-frequency swaying was analyzed. The vibration characteristics of the vehicle system were analyzed by Root-locus method to define the causes of low-frequency swaying. Finally, modification measures were proposed. The analysis results show that the significant coupling resonance between the bogie hunting mode and the inherent traverse mode of the carbody under the lower equivalent conicity is the main cause for the low frequency swaying. The locomotive can be comprehensively modified from three aspects of reducing the longitudinal positioning stiffness of the axle box, reducing the damping of the motor damper and reducing the angle of the yaw damper, which can effectively suppress the coupling resonance between bogie hunting motion and carbody traverse motion and increase the stability of primary carbody hunting. The results of both nonlinear dynamic calculation and field tests show that the low-frequency swaying of locomotive is basically eliminated after the comprehensive modification, which verifies the correctness of the analysis and the success of the modification plan.

关 键 词：2B0机车 低频晃动 振动特性 动力学分析 根轨迹法 

分 类 号：U260.11[机械工程—车辆工程]