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中文摘要：
针对齿轮设计中出现的接触和弯曲疲劳强度安全系数相差大造成的齿轮承载能力得不到充分发挥以及齿轮优化设计中设计变量多造成计算量大的问题,以航空发动机中的人字齿轮传动系统质量最小和各个齿轮的接触和弯曲疲劳强度安全系数差值最小为目标函数,通过参数敏感性分析方法选出对优化目标影响大的参数并作为设计变量,运用NSGA-Ⅱ多目标优化算法进行优化求解,结果表明,该方法能够有效地减小各个齿轮的安全系数差值和整个传动系统的质量。
英文摘要：
Based on the fact that the carrying capacity cannot be made the best use of because of the large difference between safety factor of surface durability and bending strength,and the large calculation caused by the many design parameters during the aero- engine double helical gear transmission design,the minimum weight and difference between each gear＇s safety factor of surface durability and bending strength are taken as the objective functions. The design parameters which are important to the objects are chosen as optimization variables based on parameter sensitivity analysis method. Finally,the optimization solution is carried out by using the NSGA- Ⅱ. The results of optimization design show that the method promoted can effectively reduce the difference of the safety factors and the weight of the transmission system.
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