涡轮泵转子工作转速的模糊可靠性确定方法及其应用

THE FUZZY RELIABILITY DESIGN METHOD FOR WORKING ROTATION SPEED OF TURBOPUMP ROTOR ASSEMBLY AND ITS APPLICATIONS

关键词:  液体推进剂火箭发动机  转子转速  模糊数学  可靠性设计

Key words:  Liquid propellant rocket engine  Speed of rotation  Fuzzy mathematics  Reliability design

摘要:

针对涡轮泵转子共振失效的特点，分析了转子工作状态超界的隶属函数，详细讨论了隶属函数中有关参数的确定方法，建立了转子工作转速模糊可靠性计算模型，推导出工作转速的计算公式，并与常规的工作转速确定法进行了比较。

Abstract:

The determination of critical rotation speed of turbopump rotor or the transition of operating rotation speed from admissible to inadmissible,or the rotor condition changing from normal to fault,are evolutional process,namely,fuzzy events.Aiming at the feature of resonance of the rotor,the fault membership function of the working state is analyzed.The determination of related parameters in the membership function is discussed particularly.The fuzzy reliability computing model of working rotation speed of the rotor is set up.The computing formula of the working rotating speed is derived and compared with the usual determing method