## Journal of Central South University

 第46卷    第2期    总第246期    2015年2月

[PDF全文下载]    [Flash在线阅读]

(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
)

Dynamic characteristics and test analysis of torsional vibration of diesel engine at motor dump truck

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/NZDXZAC 中南大学学报（英文版） ISSN 2095-2899 CN 43-1516/TBJCSTFT