Browse > Article
http://dx.doi.org/10.5050/KSNVN.2004.14.6.512

Free Vibration Characteristics of 5 × 5 Spacer Grid Assembly Supporting the PWR Fuel Rod  

강흥석 (한국원자력연구소)
윤경호 (한국원자력연구)
송기남 (한국원자력연구)
최명환 (한국원자력연구소)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.14, no.6, 2004 , pp. 512-519 More about this Journal
Abstract
This paper described the free vibration characteristics of Optimized H Type (OHT) spacer grids (SG) supporting the PWR fuel rod. The vibration test and the finite element (FE) analysis are performed under the free boundary condition and the clamped at two points (or three points) in the bottom which is the same one as the experimental condition for the dummy rod continuously supported by spacer grids. A modal test is conducted by the impulse excitation method using an impulse hammer and an accelerometer, and the TDAS module of the I-DEAS software is used to acquire and analyze the sensor signals. The softwares related to the FE analysis are the I-DEAS for the geometrical shape modeling and meshing, and the ABAQUS for solving. The fundamental frequency of the OHT SG by experiment under a clamped condition at two points is 175.18 Hz, and shows a bending mode. We think there is no resonance between the fuel rod and the SG because the SG's frequency is higher than that of the fuel rod existing in the range from 30 to 120 Hz. The fundamental frequency of the SG under the free boundary condition is 349.2 Hz showing a bending mode, and the results between the test and the analysis have a good agreement with maximum 7 ％ in error It is also found that the FE analysis model of the OHT SGs to analyze an impact, a buckling and vibration et al. has been generated with reliability.
Keywords
Spacer Grid; Fuel Rod; Natural Frequency; Mode Shape; PWR; Optimized H Type;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Ewins, D. J., 1984, "Modal Testing: Theory and Practice," John Wiley & Sons Inc., New York.
2 Kang, H. S., Song, K. N., Kim, H. K., Yoon, K. H. and Lee, K. H., 2001, "Evaluation of Spacer Grid Support Performance by Vibration Test," KAERI/TR-1738/2001, KAERI.
3 강흥석, 윤경호, 김형규, 송기남, 2002, "경수로용 부분 핵연료집합체$(5{\times}5)$의 진동해석을 위한 유한요소모델 개발," KAERI/TR-2008/2002, 한국원자력연구소.
4 Stoller Report, 1995, "A Study of Gridto-Rod Fretting Wear in PWR Fuel Assemblies," SMSC, Vol. 1, April.
5 송기남 외 11인, 2003, "고성능 지지격자 구조기술 개발," KAERI/RR-2308/2002, 한국원자력연구소.
6 윤경호 외 7인, 1998, "일체형 원자로용 지지격자 시편의 기계적 성능평가 시험," KAERI/TR-1147/98, 한국원자력연구소.
7 윤경호, 송기남, 강흥석, 김형규, 2001, "지지격자 스프링/딤플의 기계적 특성시험 및 유한요소해석," KAERI/TR-1763/2001, 한국원자력연구소.
8 이상설 외 7인, 2000, "연료봉 지지거동 및 진동해석 모델검증시험," KAERI/CM-328/99, 한국항공우주연구원.
9 최명환, 강흥석, 윤경호, 김형규, 송기남, 2002, "최적화 H형 및 새 이중판 지지격자로 연속 지지된 모의 연료봉의 진동해석," KAERI/TR-2063/2002, 한국원자력연구소.
10 Kang, H. S., Song, K. N., Kim, H. K., Yoon, K. H. and Jung, Y. H., 2001, "Verification Test and Model Updating for a Nuclear Fuel Rod with Its Supporting Structure," Journal of Korean Nuclear Society, Vol. 33, No. 1, pp. 73-82.   과학기술학회마을
11 최명환, 강흥석, 윤경호, 김형규, 송기남, 2002, "최적화 H형 지지격자로 지지된 경수로용 모의 연료봉의 진동특성," 한국원자력학회 2002 추계학술발표회 논문집, Paper No. KNS-02F018.
12 최명환, 강흥석, 윤경호, 김형규, 송기남, 2003, "지지격자로 지지된 모의 연료봉의 진동특성," 대한기계학회논문집A, 제 27 권, 제 3 호, pp. 424-431.   과학기술학회마을   DOI   ScienceOn
13 SDRC, 2002, "I-DEAS Master Series 9.0," Structural Dynamics Research Corporation, OH, USA.
14 Hibbit, H. D., Karlsson, G. I. and Sorensen. E. P., 2001, "ABAQUS/Standard Users Manual," Ver. 6.3, HKS Inc., RI, USA.
15 최명환, 강흥석, 윤경호, 송기남, 2003, "접촉해석이 연계된 판형 스프링 지지보의 진동해석," 한국소음진동공학회논문집, 제 13 권, 제 5 호, pp. 239-246.   과학기술학회마을   DOI   ScienceOn
16 장영기, 김규태, 조규종, 2003, "경수로 핵연료집합체 진동의 실험적 고찰," 한국소음진동공학회 2003년도 춘계학술대회논문집, pp. 82-87.   과학기술학회마을