Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)
- 2000.06a
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- Pages.1051-1057
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- 2000
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- 1598-2548(pISSN)
Rotordynamic Influences of a Tie Shaft in a APU Gas Turbine Rotor-Bearng System
보조동력 개스터빈 로터-베어링 시스템에서 체결축의 로터다이나믹 영향
- Lee, An-Sung (Korea Institute of Machinery and Materials) ;
- Lee, Young-Seob (Samsung Aerospace)
- Published : 2000.06.22
Abstract
A projected 100 kW APU gas turbine rotor-bearing system has a main outer shaft, which is composed of some numbers of segmented sections for manufacturing and assembly conveniences. For a secure assembly of the segmented sections a tie shaft or inner shaft is installed inside of the outer shaft and a tensional axial preload of 50,000 N is provided to it. In this paper it is intended to set-up a sound modeling method of the APU rotor system, and particularly, the influences of the tie shaft on the rotordynamic characteristics of the entire APU gas turbine rotor-bearing system are investigated. Analysis results show that as a conservative design practice the inner tie shaft should be actively modeled in the rotordynamic analysis of the APU rotor-bearing system, and its effects on the dynamic behaviors of the outer shaft should be thoroughly design-reviewed.
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