振动试验和颤振分析的一体化——颤振实时分析系统

INTEGRATION OF VIBRATION TEST AND FLUTTER ANALYSIS——A BRIEF INTRODUCTION TO "A REAL-TIME FLUTTER ANALYSIS SYSTEM"

“颤振实时分析系统”是航空航天工业部振动环境课题组于1985年～1988年期间组织研制的一项课题,它是参考80年代美国波音公司的振动和颤振分析方法,吸收国内最新研究成果而发展的一套计算机辅助工程软件。

This paper briefly introduces 'A Real-Time Flutter Analysis System' which is an integrated software combining theory with experiment. The two ways of using ground vibration test results of an aircraft to perform the flutter analysis in the system are described. One is directly using the modal test data. The mode vectors, if necessary, can be pre-processed by an orthogonalizing approach. The other is using a dynamic mathematical model of the aircraft modified from the modal test data. Additionally, a modification procedure for local sub-structures of the aircraft by using an inverse method of Branch Mode Synthesis developed by the authors is also presented.