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中南大学学报(自然科学版)

Journal of Central South University

第46卷    第2期    总第246期    2015年2月

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文章编号:1672-7207(2015)02-0512-07
电动轮自卸车发动机扭转振动分析与试验研究
张伟1,杨珏1,张文明1,赵翾1,郭苗苗2

(1. 北京科技大学 机械工程学院,北京,100083;
2. 北汽福田汽车工程研究院,北京,102206
)

摘 要: 针对电动轮自卸车发动机和发电机系统轴系扭转振动问题进行分析,并通过试验进行验证,提出分析此类轴系扭转振动的研究方法。根据电动轮自卸车的动力传递系统由发动机和发电机直接刚性连接而成的特点,对系统轴系进行固有振动特性和强迫振动特性分析时,建立轴系扭转振动分析的集总质量参数模型,利用系统矩阵法和能量法获得轴系的固有频率和振型。在试验验证阶段,采用非接触式扭转振动测量法进行试验验证,对比分析计算结果和试验验证结果。研究结果表明:分析计算和试验验证基本吻合,证明了针对此类轴系扭转振动分析计算方法的可靠性,并获得轴系扭转振动发生共振的主谐次和强谐次,为进一步进行扭转振动减振分析及部件设计提供了依据。

 

关键字: 电动轮自卸车;发动机;发电机;轴系;扭转振动;数学模型

Dynamic characteristics and test analysis of torsional vibration of diesel engine at motor dump truck
ZHANG Wei1, YANG Jue1, ZHANG Wenming1, ZHAO Xuan1, GUO Miaomiao2

1. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Automotive Engineering Research Institute, Beiqi Foton Motor Co., Ltd., Beijing 102206, China

Abstract:To solve the problem of torsional vibration of the engine and generator shafting in motor dump truck, through mathematical modeling analysis and experimental verification, a method was provided to analyze the torsional vibration. The powertrain system includes engine, generator and directly rigid connection between them. According to the structure, a lumped mass shaft system model was established for calculating the characteristics of free vibration and forced vibration. And the system natural frequencies and vibration modes were obtained with the matrix method and energy method though the model. Meanwhile, non-contact measurement was used in the torsional vibration test. The calculation results were compared with the test results. The results show that the calculation results and the test results are coincident, which proves that the calculation method is reliable for studying the torsional vibration in this type shafting, and the main and powerful order harmonic are obtained when shafting torsional vibration has resonance. So, the results provide a theoretical basis and method for truck design and further study in torsional vibration reduction.

 

Key words: motor dump truck; engine; generator; shafting; torsional vibration; mathematical model

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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