국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	AIRCRAFT GROUND VIBRATION TESTING AT THE NASA DRYDEN RESEARCH FACILITY ?1993
저자	Michael W. Kehoe and Lawrence C. Freudinger
Keyword	Ground vibration test; Hot structures; Modal analysis; Modal filter
URL	http://www.dfrc.nasa.gov/DTRS/1994/PDF/H-1966.pdf
보고서번호	NASA-TM-104275
발행년도	1994
출처	NASA Dryden Flight Research Center
ABSTRACT	The NASA Dryden Flight Research Facility performs ground vibration testing to assess the structural characteristics of new and modified research vehicles. This paper updates the research activities, techniques used, and experiences in applying this technology to aircraft since 1987. Test equipment, data analysis methods, and test procedures used for typical test programs are discussed. The data presented illustrate the use of modal test and analysis in flight research programs for a variety of aircraft. This includes a technique to acquire control surface free-play measurements on the X-31 airplane more efficiently, and to assess the effects of structural modifications on the modal characteristics of an F-18 aircraft. In addition, the status and results from current research activities are presented. These data show the effectiveness of the discrete modal filter as a preprocessor to uncouple response measurements into simple single-degree-of-freedom responses, a database for the comparison of different excitation methods on a JetStar airplane, and the effect of heating on modal frequency and damping.