Three-Dimensional Vibration on the Flexible Crankshaft of a Large Low-Speed Marine Diesel Engine

被引：0
|
作者：
Wei L. [1 ]
Wei H. [1 ]
Li J. [1 ]
Yang Z. [1 ]
Wu Q. [1 ]
Liu H. [1 ]
机构：
[1] Merchant Marine College, Shanghai Maritime University, Shanghai
来源：
Wei, Haijun (hxl@dlmu.edu.cn) | 1600年 / Chinese Society for Internal Combustion Engines卷 / 35期
关键词：
Coupling; Flexible block; Flexible crankshaft; Low-speed diesel engine; Three-dimensional vibration;
D O I：
10.16236/j.cnki.nrjxb.201702027
中图分类号：
学科分类号：
摘要：
Engine block and crankshaft of a large low-speed marine diesel engine were lighted with CMS method and nonlinear condensed system dynamic equations where they are coupled each other with elasto-hydrodynamic lubrication mode. Contact forces between them are obtained by finite volume method according to Reynolds equation and Greenwood/Tripp asperity theory. A three-dimensional vibration model of the crankshaft was built up, and the modeling method and model are verified by comparison with the classic models. Results indicate that whole instantaneous characteristics of torsional vibration, lateral vibration and axial vibration of the crankshaft can be obtained simultaneously. The lateral and axial vibrations of crankshaft show typical nonlinear features. Horizontal lateral vibration of crankshaft is more harmful to the bearing shells than vertical lateral vibration in shock and vibration. The modeling method reveals the vibration mechanism and supports optimization design of the crankshaft. © 2017, Editorial Office of the Transaction of CSICE. All right reserved.
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页码：185 / 191
页数：6
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