带中介轴承双转子系统的"可容模态"优化设计方法
Workable mode optimization design method for dual-rotor system with inter-shaft bearing
王瑞 1廖明夫 1程荣辉 2丛佩红 2雷新亮3
作者信息
- 1. 西北工业大学动力与能源学院,西安 710129
- 2. 中国航发沈阳发动机研究所,沈阳 110015
- 3. 中国航发四川燃气涡轮研究院,成都 610500
- 折叠
摘要
为解决航空发动机双转子系统无法避开临界转速的问题,建立带中介轴承的双转子系统模型,考虑不平衡敏感度、阻尼器效果和中介轴承载荷影响,构建低压激励模态可容度评价函数和高压激励模态可容度评价函数,确定双转子"可容模态"优化设计目标函数和约束条件,建立了带中介轴承双转子系统的"可容模态"优化设计方法.研究发现,采用"可容模态"优化设计方法,与传统的"临界转速裕度"准则设计相比,带中介轴承的双转子系统轮盘最大振幅减小39.83％,轴系总质量减轻2.32％,支承外传力减小64.98％,表明所建立的带中介轴承双转子系统的"可容模态"优化设计方法是有效的.
Abstract
In order to solve the problem that the dual-rotor system of aero-engine cannot avoid the critical speed,a model of dual-rotor system with inter-shaft bearing was established.Considering the influence of unbalance sensitivity,damper effect and the load effect of inter-shaft bearing,the tolerability evaluation functions of low-pressure and high-pressure rotor excited modes were constructed,the tolerability objective function and the constraint condition for optimization design on workable mode of dual-rotor were confirmed,and the optimization design method for the workable mode of dual-rotor system with inter-shaft bearing was established.It was found that compared with the traditional critical speed margin design criterion,the maximum amplitude of the disk of the dual-rotor system with inter-shaft bearing was reduced by 39.83％,the total mass of the shafting was reduced by 2.32％,and the external force of the fulcrum was reduced by 64.98％by using the optimization design method for the workable mode,indicating that the optimization design method for the workable mode of dual-rotor system with inter-shaft bearing was effective.
关键词
航空发动机/中介轴承/双转子系统/可容模态/优化设计Key words
aero-engine/inter-shaft bearing/dual-rotor system/workable mode/dynamic optimization design引用本文复制引用
基金项目
国家科技重大专项(2017-Ⅳ-0001-0038)
出版年
2024
NETL
NSTL
万方数据