多缸内燃机轴系扭振性能的计算分析与改善

以GK1C内燃机车的 6L2 4 0柴油机为例 ,利用蒙特卡罗模拟法对各缸功率不均衡状况下的轴系扭振进行了计算和分析 ,找出了各缸功率不均衡对扭振振幅和频率的影响以及一些其他规律。此外 ,在理论分析的基础上 ,找到了改善轴系扭振性能的有效途径 ,并通过对比计算进行了验证。结果表明 :优化排列各缸功率不均衡系数 ,改善轴系扭振性能的方法 ,能将最差情况下的扭振振幅减小 5 0 %以上 ,从而可改善和提高内燃机轴系扭振性能的稳定性和可靠性。

Computation ,Analysis and Improvement for Torsional Vibration Property in Multi- cylinder I. C. E.

Taking the 6L240 diesel engine in GK1C as an example,the torsional vibration computation and analysis are carried out by using the Montecarlo simulation method,and the effect of unequal power contribution of each cylinder on vibration amplitude and frequency,and some other laws are obtained in this paper.In addition,based on theoretical analysis,this paper presents effective method which is proved by calculation to improve torsional vibration.The conclusion indicates that optimum arrangement of unequal coefficient of power in each cylinder and methods for improving torsional vibration property can decrease more than 50% of the vibratory angle in the most dangerous condition.