机械科学与技术2017，Vol.36Issue(3)：335-340,6.DOI:10.13433/j.cnki.1003-8728.2017.0302
连杆柔性化处理对机体表面振动及主轴承受力的影响
Diesel Engine Body Vibration and Main Bearing Force Analysis when using Flexible Connecting Rod
朱亚亚 1毕凤荣 1邵康1
作者信息
- 1. 天津大学内燃机燃烧学国家重点实验室,天津300072
- 折叠
摘要
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.关键词
多体动力学/连杆/柴油机/振动Key words
multi-body dynamics/connecting rod/diesel engine/vibration分类
能源科技引用本文复制引用
朱亚亚,毕凤荣,邵康..连杆柔性化处理对机体表面振动及主轴承受力的影响[J].机械科学与技术,2017,36(3):335-340,6.
