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对某涡桨发动机低压模拟转子的动力特性进行了研究。基于梁单元的有限元法,建立了转子的分析模型,借助转子动力学分析软件SAMCEF/ROTOR对转子的前三阶临界转速和振型进行了计算,并在高速旋转试验器上实现了全转速范围内的动力特性试验。研究表明,在额定工作转速范围内,低压模拟转子有两阶临界转速,前两阶振型均为刚体振型,止口定心传扭结构设计合理,在全转速范围内能够可靠工作,为同类转子的动力特性分析和试验提供了参考。
The dynamic characteristics of a low-pressure simulated rotor of a turboprop engine are studied. Based on the finite element method of beam element, an analytical model of the rotor was established. The rotor’s first three critical speeds and modes were calculated by rotor dynamic analysis software SAMCEF / ROTOR. The full rotation speed Range of dynamic characteristics of the test. The research shows that in the range of rated working speed, the low-voltage analogue rotor has two-order critical speed and the first two modes are all rigid body type. The design of the centering torsional torsion structure is reasonable and can work reliably in the whole speed range. The same type of rotor dynamic characteristics analysis and test provides a reference.