在YF－75发动机现有的平衡点计算程序基础上，通过进一步的改进，形成一套非线性稳态故障仿真方法，用来研究YF－75发动机主要部件发生故障时参数的稳态变化规律，并对发动机某次试车中故障关机时的多数进行了分析。结果表明，该方法能够较好地模拟发动机一些主要故障发生时的参数稳态变化，对发动机所发生故障的确定能起到指导和辅助作用。最后，还针对正在进行的YF－75发动机故障诊断研究工作提出了一些设想。 Based on the existing balance point calculation program of the YF-75 engine, a set of nonlinear steady-state fault simulation methods are formed by further improvement to study the steady-state variation of the parameters of the main components of the YF- And a test of the engine in the shutdown when the failure of the majority were analyzed. The results show that the proposed method can simulate the steady-state changes of the parameters of some major faults in the engine well and can guide and assist the determination of the engine faults. Finally, some ideas are put forward for the ongoing research work on YF-75 engine fault diagnosis.