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给出并改进了描述液体火箭发动机稳态工况的非线性数学模型；用修正的Ｇａｕｓｓ－Ｎｅｗｔｏｎ法求解各性能参数，分析了每个干扰因素分别对液体火箭发动机参数的影响，用非线性模型和小偏差方法对比分析了两个干扰因素分别和共同对发动机参数的影响；所得结论可用于发动机试验结果分析、发动机可靠性分析、发动机故障分析，也可用于揭示发动机参数随各种干扰因素的变化规律
The nonlinear mathematical model describing the steady-state condition of liquid propellant rocket engine is given and improved. The modified Gauss-Newton method is used to solve the performance parameters and the influence of each disturbance factor on the parameters of liquid propellant rocket engine is analyzed respectively. And the small deviation method are compared to analyze the influence of two disturbing factors on the engine parameters respectively. The conclusions can be used in the analysis of the engine test results, the reliability analysis of the engine and the analysis of the engine failure. The results can also be used to reveal the influence of the engine parameters with various disturbing factors The law of change