Diesel Engine Body Vibration and Main Bearing Force Analysis when using Flexible Connecting Rod

Zhu Yaya; Bi Fengrong; Shao Kang

doi:10.13433/j.cnki.1003-8728.2017.0302

Volume 36 Issue 3

Mar. 2017

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Article Navigation > Mechanical Science and Technology for Aerospace Engineering > 2017 > 36(3): 335-340

Zhu Yaya, Bi Fengrong, Shao Kang. Diesel Engine Body Vibration and Main Bearing Force Analysis when using Flexible Connecting Rod[J]. Mechanical Science and Technology for Aerospace Engineering, 2017, 36(3): 335-340. doi: 10.13433/j.cnki.1003-8728.2017.0302

Citation:

Zhu Yaya, Bi Fengrong, Shao Kang. Diesel Engine Body Vibration and Main Bearing Force Analysis when using Flexible Connecting Rod[J]. Mechanical Science and Technology for Aerospace Engineering, 2017, 36(3): 335-340. doi: 10.13433/j.cnki.1003-8728.2017.0302

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Diesel Engine Body Vibration and Main Bearing Force Analysis when using Flexible Connecting Rod

doi: 10.13433/j.cnki.1003-8728.2017.0302

1.
State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China

Received Date: 2015-08-13
Publish Date: 2017-03-05

Abstract

Abstract

In order to explore the influence of the elastic deformation of connecting rod on engine block surface vibration, multi-body dynamics analysis is used in this paper. First, a model of an in-line 6-cylinder diesel engine is built by AVL EXCITE Designer, including the finite element model and simulation model of cylinder block, crankshaft and connecting rod. Then, modal analysis and experimental verification are carried out to ensure the accuracy of the simulation model. Through the vibration acceleration of different locations selected in the model, engine block surface vibration is evaluated respectively for using rigid connecting rod and flexible connecting rod. According to the simulation results, the acceleration of each analysis point on the body has a certain decline, and fluctuations in the peak are also significantly reduced when considering the flexible connecting rod. Results also show that using flexible body makes main bearing stress decrease at piston movement direction, and the minimum film thickness at the peaks becomes smaller. A much satisfactory agreement of simulation and measurement results can be achieved when considering flexible connecting rod.
- multi-body dynamics,
- connecting rod,
- diesel engine,
- vibration

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References(15)

References

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