燃-燃联合动力装置(COGAG)以其功率密度大、机动性好等优势，在船舶动力领域展现了很好的发展前景。对燃-燃联合动力装置的部件进行了模块化建模，为提高模型的计算效率和收敛性，对传统的牛顿拉普森（NewtonRapson）迭代法进行改进，建立了COGAG稳态模型。利用四阶龙格库塔法建立动态模型，在python仿真环境下对建模方法进行了仿真验证。仿真结果表明：提出的基于改进牛顿法的燃-燃联合动力装置的建模方法可以实现系统的稳态和动态运行过程，提高了模型稳态计算的收敛速度，为联合动力装置的响应特性研究和控制器的设计提供了模型基础。

Because of its advantages such as high power density and good maneuverability,the combined gas turbine and gas turbine (COGAG) device has shown a good development prospect in the field of marine power. Modular modeling for the components of COCAG was established.In order to improve the computational efficiency and convergence of the model,the traditiobal NewtonRapson algorithm is improved to establish the steadystate model of COGAG.Then fourthorder RungeKutta Algorithm is used to establish the dynamic model.The modeling method is verified by simulation in Python environment.The simulation results show that the modeling method for COGAG proposed can simulate the steadystate and dynamic operation.The convergence speed of steadystate calculation is improved. The model foundation is provided for the study of response characteristics and the controller design of the system.

U664.1

国家科技重大专项（2017-V-0005-0055，2017-Ⅰ-0011-0012)