对转螺旋桨/桨扇差动行星齿轮机构动力学设计方法及分析

在对转桨扇涡桨推进系统专有的外流对转桨推进器-对转减速齿轮机构-涡桨发动机的总体匹配设计问题中，给出了拖动共轴对转螺旋桨/桨扇类气动负荷的差动行星齿轮机构的一种设计与分析方法.不同于常规，该总体设计方法以机构的动力学参数为输入，诸传动比、诸半径、诸稳态传动受力等为输出，通过方程组得到了该类传动机构诸参数之间的联系.讨论了该类传动机构的设计原则，使用形式，适用的航空原动机类型.通过某当代算例给出了桨和传动机构诸参数的变化区间，变化特点，参数重要性的分析.结果表明:该方法可以快速得到一般总体设计问题中该类齿轮机构所有稳态设计参数的可行解区间与优化解，进而还可以为推进系统部件法数模的非设计点特性模拟提供计算方法. 

Design method and analysis of differential planetary gear mechanism for contra-rotating propellers/propfans

A design and analysis method of the differential planetary gear decelerating mechanism for driving the type of loading of aerodynamic turbo-machinery, especially the co-axial contra-rotating propellers or propfans, was put forward. Differing from the ordinary path, this integral performance method considered the kinetic parameters first and solved the speed ratios, radii, steady exerting forces last, then the correlations among those parameters of the transmission mechanism were established by equations. The conceivable design principles, utilizing types, suitable prime mover aero-engines of the mechanism were discussed. An analytical case of modern turboprop was provided for obtaining the variable intervals of the propfan and mechanism, the features and the importance of those design parameters. Result shows that this method can reveal the domains of feasible solution and the optimal designs of all stable parameters of the mechanism and serve as a theoretical model in the overall simulation of the off-design characteristic of a propulsion system.