A Study on Anti-Shock Performance of Marine Diesel Engine Based on Multi-Body Dynamics and Elastohydrodynamic Lubrication

Applied Sciences

Zhaoqi He¹  Liang Chen¹  Xigeng Song¹  Dongxin Xue¹  Dongjie Huang² 

[1] Institute of Internal Combustion Engine, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China;Training Department, Guangzhou Staff Training Base, China Railway Guangzhou Group Co. Ltd., Guangzhou 510800, China;

关键词: diesel engine;    anti-shock;    multi-body dynamics;    elastohydrodynamic lubrication;    main bearing;    crankshaft;   

DOI  :  10.3390/app112311259

来源: DOAJ

【 摘 要 】

Diesel engine anti-shock performance is important for navy ships. The calculation method is a fast and economic way compared to underwater explosion trial in this field. Researchers of diesel engine anti-shock performance mainly use the spring damping model to simulate the main bearings of a diesel engine. The elastohydrodynamic lubrication method has been continuously used in the main bearings of diesel engines in normal working conditions. This research aims at using the elastohydrodynamic lubrication method in the main bearings of the diesel engine in external shock conditions. The main bearing elastohydrodynamic lubrication and diesel engine multi-body dynamics analysis is based on AVL EXCITE Power Unite software. The external shock is equivalent to the interference on the elastohydrodynamic lubrication calculation. Whether the elastohydrodynamic lubrication algorithm can complete the calculation under interference is the key to the study. By adopting a very small calculation step size, a high number of iterations, and increasing the stiffness of the thrust bearing, the elastohydrodynamic lubrication algorithm can be successfully completed under the external impact environment. The calculation results of the accelerations on engine block feet have a similar trend as the experiment results. Diesel engines with and without shock absorbers in external shock conditions are calculated. This calculation model can also be used for diesel engine dynamics calculations and main bearing lubrication calculations under normal working conditions.

【 授权许可】

Unknown