基于多体动力学的风扇连接盘强度分析

Fatigue Strength Analysis of Fan Flange Based on Multi-body Dynamics

以某国Ⅵ发动机曲轴直连风扇连接盘为研究对象,在不考虑摩擦阻力与负载阻力的情况下,建立了风扇连接盘与曲柄连杆机构、机体等结构的多体动力学模型,计算了风扇连接盘的疲劳强度,并根据计算结果对风扇连接盘进行了改进。对改进前后的风扇连接盘进行耐久试验,试验结果与仿真结果相吻合,表明基于多体动力学的风扇连接盘强度分析能有效识别风险,避免风扇连接盘发生故障,为曲轴直连风扇连接盘的设计提供了支持。

Fatigue strength of the crankshaft directly-connected fan flange of a certain China VI stage engine is researched in this paper.Multi-body dynamics model of fan flange,crank and connection rod mechanism,engine body is built without considering friction resistance and load resistance.Improvement is made according to calculation results.Experiments are carried out,and result is the same with calculation results.It shows that fatigue strength analysis of fan flange based on multi-body dynamic is effective to identify and avoid fracture and can provide support for fan flange design.