국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	DEVELOPING UNCERTAINTY MODELS FOR ROBUST FLUTTER ANALYSIS USING GROUND VIBRATION TEST DATA
저자	Starr Potter and Rick Lind
Keyword	Flutter; Ground vibration test; Uncertainty
URL	http://www.dfrc.nasa.gov/DTRS/2001/PDF/H-2452.pdf
보고서번호	NASA-TM-2001-210392
발행년도	2001
출처	NASA Dryden Flight Research Center
ABSTRACT	A ground vibration test can be used to obtain information about structural dynamics that is important for flutter analysis. Traditionally, this information - such as natural frequencies of modes - is used to update analytical models used to predict flutter speeds. The ground vibration test can also be used to obtain uncertainty models, such as natural frequencies and their associated variations, that can update analytical models for the purpose of predicting robust flutter speeds. Analyzing test data using the infinity-norm, rather than the traditional 2-norm, is shown to lead to a minimum-size uncertainty description and, consequently, a least-conservative robust flutter speed. This approach is demonstrated using ground vibration test data for the Aerostructures Test Wing. Different norms are used to formulate uncertainty models and their associated robust flutter speeds to evaluate which norm is least conservative.