| 摘要:基于多体动力学和有限元方法,对柴油机运动件,包括曲柄连杆机构、配气机构以及齿轮传动系统进行了仿真分析,得到配气机构的凸轮轴承力、气门落座力和摇臂激励力等激励力。建立某柴油机结构有限元模型,研究了配气机构激励力对柴油机整机及主要部件振动特性的影响。结果表明:配气机构激励力对柴油机整机总频段振动有一定影响,其中对1 000Hz以下频段影响较大,而1 000Hz以上频段影响不大；对气门室罩、气缸盖和机体上侧振动影响比较大,对机体下侧和油底壳影响相对较小。 |
| 关键词: 配气机构 柴油机 振动 多体动力学 有限元 |
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| Study on Effect of Valve Train’s Exciting Force to Vibration of Diesel Engine |
| Lu Chuanrong,Ma Bingjie,Wang Zhigang |
| Naval Deputy Office of Shanghai Marine Diesel Engine Research Institute, Shanghai 201108;Shanghai Marine Diesel Engine Research Institute, Shanghai 20090 |
| Abstract:Based on multi-body system dynamics and FEM, the dynamic simulation of the mobile parts in diesel engine, including crank and connecting rod mechanism, valve train and gear transmission system were carried out, thus the dynamics characteristic data, such as cam bearing force and valve seat reaction force, as well as rocking arm exciting force, etc. were obtained from the model. The finite element analysis model of diesel engine was built and the effect of valve train exciting force to vibration characteristics of the whole diesel engine and its main parts was studied. The results showed that the vibration of diesel engine was affected by valve train, when under 1000Hz, the influence tended to be bigger, and the influence is small when the frequency is above 1000Hz; valve train made greater influence on valve chamber cover, cylinder head and upper engine body than oil sump and nether engine body. |
| Key words: valve train diesel engine vibration multi-body system dynamics FEM〖FL |
