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发动机曲轴系统的扭转振动是引发发动机振动造成断裂的重要因素,以某30T工程车辆直列四缸发动机曲轴轴系作为研究对象,建立曲轴轴系的ANSYS有限单元模型,基于模型分析轴系的扭转振动的固有振动和强迫振动特性,获得常用转速范围内的主谐次与次主谐次及对应发动机转速,结合最优经典设计方法对曲轴扭转减振器的参数进行设计,基于有限单元模型验证不同工况下减振器的减振效果;结果表明所设计减振器减振效果良好,为同类车辆发动机曲轴系统的扭转振动分析、扭转减振器的设计及分析提供参考。
The torsional vibration of the engine crankshaft system is an important factor that causes the engine vibration to rupture. Based on the crankshaft system of an inline four-cylinder engine of a 30T engineering vehicle, ANSYS finite element model of the crankshaft system is established. The torsional vibration of the shaft system is analyzed based on the model The inherent vibration and forced vibration characteristics of the crankshaft torsional vibration damper are obtained. The parameters of the torsional vibration damper in the crankshaft are designed based on the optimal classical design method. The finite element model is used to verify the difference between the primary harmonic and the secondary harmonic and the corresponding engine rotational speed. The results show that the damping effect of the designed shock absorber is good, which provides a reference for the torsional vibration analysis and the torsional vibration damper design and analysis of the crankshaft system of similar vehicle.