The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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Mistuning Intensity Effect to Optimization of Mistuning Pattern for Bladed Disk

블레이드 디스크의 Mistuning 패턴 최적화에 미치는 Mistuning 강도의 영향

  • Choi, Byeong-Keun (School of Mech. and Aerospace Eng., The Institute of Marine Industry, Gyeongsang National Univ.) ;
  • Kim, Hyo-Jung (Mech. Eng., Gyeongsang National Univ.) ;
  • Jeong, Han-Eol (Mech. Eng., Gyeongsang National Univ.) ;
  • Gu, Dong-Sik (Mech. Eng., Gyeongsang National Univ.) ;
  • Kim, Won-Chul (School of Mech. and Aerospace Eng., The Institute of Marine Industry, Gyeongsang National Univ.)
  • Published : 2007.02.01
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Abstract

In turbomachinery rotor, there are small differences in the structural and/or geometrical properties of individual blades, which are referred to as blade mistuning. Mistuning effects of the forced response of bladed disks can be extremely large as often reported in many studies. In this paper, the pattern optimization of intentional mistuning for bladed disks considering with intentional mistuning intensity effect is the focus of the present investigation. More specifically, the class of intentionally mistuned disks considered here is limited, for cost reasons, to arrangements of two types of blades (A and B, say) and Genetic Algorithm is used to optimize the arrangement of these blades around the disk to reduce the forced response of blade with intentional mistuning intensity levels.

일반적으로 터보 기계에서 mistuning은 구조적, 기하학적인 면에서의 blade와 blade사이의 미소한 특성의 차이를 의미하며, 이러한 미소한 차이가 강제 진동 시, 발생하는 진동 에너지가 몇 개의 blade 또는 하나의 blade에 집중되어 매우 큰 진동을 야기 시킬 수 있다는 사실이 여러 논문들에 언급되고 있다. 또한 mistuning에 대한 blade 시스템의 강제진동응답의 감도를 줄이기 위하여, intentional mistuning개념을 설계단계에 도입하려고 하는 연구도 진행되고 있다. 따라서 본 논문에서는 두 가지 형태의 blade만을 사용하여 bladed disk의 강제진동응답을 최소화 할 수 있는 intentional mistuning의 pattern 최적화에 미치는 mistuning intensity 영향을 조사하였고 최적화 알고리즘으로 유전알고리즘을 사용하였다.

Keywords

References

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