航空发动机整机振动半实物建模方法研究  

Study on a Semi-Physical Method for Modeling Overall Vibration of an Aero-Engine

作　　者：赵斌[1] 陈果[1] 冯国全[2] 

机构地区：[1]南京航空航天大学民航学院,江苏南京211106 [2]中国航空工业集团公司沈阳发动机设计研究所,辽宁沈阳110015

出　　处：《推进技术》2016年第2期346-353,共8页Journal of Propulsion Technology

基　　金：南京航空航天大学青年科技创新基金(NS2013070)

摘　　要：为了研究一种快速准确地分析航空发动机整机振动的建模方法,采用试验与仿真结合,在转子模型中综合机匣-支承试验数据的半实物建模方法,对整机振动半实物建模原理,机匣-支承传递函数测试、结构综合建模等问题进行了研究,运用航空发动机转子试验器对半实物建模方法进行验证。建立试验器整机及半实物仿真模型,计算机匣振动响应;拆装转子试验器,测试机匣-支承连接位置频率响应函数,综合转子有限元模型,建立基于试验数据的试验器半实物模型,计算整机频率响应函数。结果表明,半实物建模方法能够在保证计算精度的前提下缩减90%以上的计算时间,运用半实物模型能够准确地获得整机频率响应函数,固有频率计算误差在2%以内。In order to study a modeling method to analyze the overall aero-engine vibration problem more quickly and precisely and precisely, a semi-physical modeling method which combines testing and simulation modeling method together is used. The casing-support testing data is set into rotor finite element model during the modeling procedure. The overall vibration semi-physical modeling principle, casing-support structure transfer function testing and synthesized modeling method are studied. An aero-engine rotor tester is used to validate the semi-physical modeling method. The rotor tester overall and semi-physical simulation model are built to calcu-late the casing vibration responses. The rotor tester is disassembled to test the casing-support frequency response function which is synthesized with the rotor finite element model. The overall aero-engine tester semi-physical model based on testing data is built to calculate the overall aero-engine frequency response function. The results show that semi-physical modeling method can not only maintain the calculation accuracy,but also reduce more than 90% of the computation time. The semi-physical model can obtain the overall aero-engine frequency re-sponse function fast and precisely,and the nature frequency calculation error is less than 2%.

关 键 词：子结构方法 转子动力学 有限元方法 模态分析 测试技术 

分 类 号：V232[航空宇航科学与技术—航空宇航推进理论与工程]