노즐 분사력에 의해 가진되는 다중 패킷 블레이드계의 과도 진동 해석Transient Vibration Analysis of a Multi-packet Blade System Excited by Nozzle Jet Forces
- Other Titles
- Transient Vibration Analysis of a Multi-packet Blade System Excited by Nozzle Jet Forces
- Authors
- 임하성; 유홍희
- Issue Date
- Jul-2008
- Publisher
- 한국소음진동공학회
- Keywords
- 과도 진동 해석; 다중 블레이드계; 슈라우드; 노즐 분사력; 연성 강성 효과; 외팔보; 진공진; 수정된 캠벨 다이아그램; Transient Vibration Analysis; Multi-packet Blade System; Shroud; Nozzle Jet Force; Coupling Stiffness Effect; Cantilever Beam; True Resonance; Modified Campbell Diagram
- Citation
- 한국소음진동공학회논문집, v.18, no.7, pp.711 - 717
- Indexed
- KCI
- Journal Title
- 한국소음진동공학회논문집
- Volume
- 18
- Number
- 7
- Start Page
- 711
- End Page
- 717
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/178125
- ISSN
- 1598-2785
- Abstract
- A modeling method for the modal and the transient vibration analysis of a multi-packet blade system excited by nozzle jet forces is presented in this paper. Blades are idealized as cantilever beams and the elastic structures like disc and shroud connecting blades are modeled as coupling stiffnesses. A modified Campbell diagram is proposed to identify true resonance frequencies of the multi-packet blade system. Different from the SAFE diagram that employs three dimensional space, the modified Campbell diagram proposed in this study employs a plane to find the true resonance frequencies. To verify the existence of true resonance frequencies, nozzle jet forces are modeled as periodic forces and transient vibration analysis were performed with the modeling method.
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