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

作　　者：王瑞 廖明夫[1] 程荣辉 丛佩红 雷新亮 WANG Rui;LIAO Mingfu;CHENG Ronghui;CONG Peihong;LEI Xinliang(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710129,China;Shenyang Engine Research Institute,Aero Engine Corporation of China,Shenyang 110015,China;Sichuan Gas Turbine Establishment,Aero Engine Corporation of China,Chengdu 610500,China)

机构地区：[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

出　　处：《航空动力学报》2024年第9期47-58,共12页Journal of Aerospace Power

基　　金：国家科技重大专项(2017-Ⅳ-0001-0038)。

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。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 

分 类 号：V235.13[航空宇航科学与技术—航空宇航推进理论与工程]