高速柴油机曲轴扭转—纵向耦合振动的研究

COUPLED TORSIONAL-AXIAL VIBRATION OF THE CRANKSHAFT FOR A HIGH SPEED DIESEL ENGINE

本文研究了高速柴油机轴系的扭转—纵向耦合振动的机理和计算方法。分析了高速车用柴油机曲轴耦合振动的机理 ,建立了多质量模型的扭转及扭—纵耦合振动相结合的矩阵方程 ,并分析了其解析方法。采用新设计的三维振动测量装置对某直列六缸柴油机曲轴自由端的纵振进行了实际测量 ,与计算结果相比吻合。

This paper studied the principle and method of calculation for the coupled torsional axial vibration of the crankshaft for a high speed vehicle diesel engine. The paper analysed the coupled vibration of vehicular diesel engine crankshaft, and proposed expressions for the amplitude of vibration. The paper constructed a multi mass model and matrix equation by combining equations for torsional vibration and coupled vibration, with an analysis of the method of calculation. With a newly designed testing set up the axial and torsional vibration of the crankshaft at the free end of an in line 6 cylinder diesel engine was measured. Its results agree well with those from calculations. It verifies the analysis given for the coupled vibration of high speed diesel engines.