航空圆弧端齿的齿根双圆弧结构设计及优化

发布时间：2018-11-25 15:40

【摘要】：针对航空发动机圆弧端齿结构齿根单圆弧连接区域存在比较严重的应力集中问题,提出一种圆弧端齿结构齿根双圆弧设计方法,以改善齿根附近的应力集中现象。文中推导建立了双圆弧设计的基本公式,算例对比分析表明双圆弧设计的齿根最大等效应力比单圆弧设计降低了5.5%。在此基础上,根据EGD-3应力标准和格里森圆弧端齿设计准则,建立圆弧端齿结构的优化模型,采用精英保留遗传算法的优化方法对圆弧端齿进行了优化设计分析,优化结果表明双圆弧优化设计的齿根最大等效应力比单圆弧设计降低了12.3%,同时改善了齿根附近的应力分布状态。
[Abstract]:Aiming at the serious stress concentration problem in the single arc connection region of the tooth root of the circular end tooth structure of aeroengine, a design method of double circular arc for the tooth root of the arc end tooth structure is proposed to improve the stress concentration phenomenon near the tooth root. In this paper, the basic formulas for the design of double circular arcs are derived and established. The comparison and analysis of examples show that the maximum equivalent stress of tooth root in the design of double circular arcs is 5.5% lower than that in the design of single circular arc. On this basis, according to EGD-3 stress standard and Gleason arc end tooth design criterion, the optimization model of circular arc end tooth structure is established, and the optimization design analysis of circular arc end tooth is carried out by using elite reserved genetic algorithm. The results of optimization show that the maximum equivalent stress of tooth root in the optimization design of double circular arc is 12.3 less than that in the single arc design, and the stress distribution near the tooth root is improved at the same time.
【作者单位】：南京航空航天大学能源与动力学院/机械结构力学及控制国家重点实验室/江苏省航空动力系统重点实验室;
【基金】：江苏省普通高校研究生科研创新计划资助项目(CXZZ12_0170) 中央高校基本科研业务费专项资金资助
【分类号】：V232.8

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