Journal of Dalian Maritime University >
2017 , Vol. 43 >Issue 1: 53 - 60
DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2017.01.009
Effect of coupling mode between block and crankshaft of marine diesel engines on vibration
Received date: 2016-07-19
Revised date: 2016-09-19
Online published: 2016-09-30
To accurately and quickly calculate the whole vibration of the crankshaft and the engine block of a marine diesel engine, the component mode synthesis method was used to dynamically reduce block and crankshaft, the nonlinear condensed and flexible system dynamic equations with NONL, EHD and TEHD coupled each other mode were built, and the numerical solution was solved by using Newmark method. Comparison shows that the calculation efficiency of NONL mode is the highest, EHD mode follows, and TEHD mode is the lowest. But the calculation precision is just inverse. The effect of different coupling modes on vibration of the block and the crankshaft is also different. Therefore, by considering the calculation efficiency and precision, NONL mode is better if engine block is the focus, EHD or TEHD are better if crankshaft vibration is the emphasis, and EHD mode is better if both of block and crankshaft are concerned simultaneously.
Key words： marine diesel engine; whole vibration; NONL coupling; EHD coupling; TEHD coupling
WEI Li-dui , WEI Hai-jun , DUAN Shu-lin , LI Jing-ming , YANG Zhi-yuan , LIU Hong . Effect of coupling mode between block and crankshaft of marine diesel engines on vibration[J]. Journal of Dalian Maritime University, 2017 , 43(1) : 53 -60 . DOI: 10.16411/j.cnki.issn1006-7736.2017.01.009
［1］International Maritime Organization. Adoption of the code on noise level on board ships［M］.London: International Maritime Organization,2012:16-22.
［2］International Association of Classification Societies. Human element recommendations for structural design of lighting, ventilation, vibration, noise, access and egress arrangements ［M］.London: International Association of Classification Societies LTD,2013：10-12,17-23.
［3］HU K, MOURELATOS Z P,VLAHOPOULOS N. Computational analysis for dynamic response of a rotating shaft on flexible support structure with clearances［J］.Journal of Sound and Vibration,2003,267(1):1-28.
［4］OFFNER G, PRIEBSCH H H. Flexible multi-body dynamics simulation – a powerful method for prediction of structure borne noise of internal combustion engines［C］// Proceedings of the International Conference on Noise and Vibration Engineering (ISMA2006).［S.l.］：ISMA,2006.
［5］CHETTI B.Analysis of a circular journal bearing lubricated with micropolar fluids including EHD effects［J］.Industrial Lubrication and Tribology,2014,66(2):168-173.
［6］WEI Li-dui，WEI Hai-jun，DUAN Shu-lin,et al.An EHD-mixed lubrication analysis of main bearings for diesel engine based on coupling between flexible whole engine block and crankshaft［J］.Industrial Lubrication and Tribology,2015,67(2):150-158.
［7］ALLMAIER H,PRIESTNER C,REICH F M, et al. Predicting friction reliably and accurately in journal bearings-extending the EHD simulation model to TEHD［J］.Tribology International，2013,58:20-28.
［8］魏立队,段树林,邢辉,等.船舶柴油机主轴承热弹性流体动力混合润滑分析［J］.内燃机学报，2013,31(2):183-191.
WEI Li-dui,DUAN Shu-lin,XING Hui,et al. Thermo-elasto-hydrodynamic behavior of main bearings of marine diesel engines in mixed lubrication［J］.Transactions of CSICE,2013，31(2):183-191．(in Chinese)
［9］BAMPTON M C C,Jr CRAIG R R.Coupling of substructures for dynamic analysis［J］.AIAA Journal,1968,6(7):1313-1319.
［10］魏立队．船用二冲程柴油机及推进轴系的振动建模与仿真研究［D］．大连：大连海事大学，2012.
WEI Li-dui.Research on the vibration modeling and simulation of the marine two-stroke diesel engine and the propulsion shafting［D］.Dalian:Dalian Maritime University,2012.
(in Chinese)
［11］KRASSER J. Thermo-elasto-hydrodyanmic analysis of dynamically loaded journal bearing［D］.Styria:Technology University of Graz,1996.
［12］GREENWOOD J A,TRIPP J H.The contact of two nominally flat rough surface［J］.Proceedings of the Institution of Mechanical Engineers,1971,185(46):625-633.
/
| 〈 |
|
〉 |