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A Characteristic Analysis on the Elastic Stiffness of the Tapered-width Leaf Type Holddown Spring Assembly Designed in KOFA's Design Space

Song, Kee-Nam   (Korea Atomic Energy Research InstituteCC0186830  ); Seo, Keum-Seok  
  • 초록

    An elastic stiffness formula of a leaf type holddown spring(HDS) assembly with a uniformly tapered width from $w_0$ to $w_14$ over the length, has been analytically derived based on Euler beam theory and Castigliano's theorem. Elastic stiffnesses of the tapered-width leaf type HDSs(TW-HDSs) designed in the same dimensional design spaces as the KOFA HDSs have been evaluated from the derived formula, in addition, a parametric study on the elastic stiffness of the TW-HDSs has been carried out. Analysis results show that, as the effects of axial and shear force on the elastic stiffness of He TW-HDSs have been 0.15~0.21% of the elastic stiffness, most of the elastic stiffness is attributed to the bending moment, and that elastic stiffnesses of the TW-HDSs have been about 32~33% higher than those of the KOFA HDSs. It is found that the number of leaves composing a HDS assembly could be lessened by one under the conditions that the TW-HDSs have been adopted in KOFA.


  • 참고문헌 (13)

    1. Fuel Assembly Mechanical Design Manual , Song K. N.(et al.) , KWU Work Report, U6321/87/e326 / v.16,pp.11,
    2. A Elastic Stiffness Analysis on the Tapered-width HDS , Song K.N. , Proc. of the KNS Spring Meeting(Ⅲ) / v.,pp.27-32,
    3. Westinghouse Mechanical Design Manual-Fuel Assembly , Fuel Assembly Holddown Springs and Screws(Rev.03) / v.1,pp.,
    4. Dong Seong Sohn(et al.) , Fuel Design Report for 14×14 Fuel Assembly / v.,pp.,
    5. Stiffness Analysis on the Leaf-type holddown spring assembly , Song K.N.;(et al.) , KAERI/TR-209/91 / v.,pp.,
    6. S. H. Crandall;(et al.) , An Introduction to the Mechanics of Solids,(2nd ed.) / v.,pp.,
    7. Dong Seong Sohn(et al.) , Fuel Design Report for 17×17 Fuel Assembly / v.,pp.,
    8. Dong Seong Sohn(et al.) , Fuel Design Report for 16×16 Fuel Assembly / v.,pp.,
    9. PWR Fuel Rod Design and Fuel Assembly Design , Paul J. Sipush , Lecture Notes / v.,pp.,
    10. A Characteristic Analysis on the Holddown Spring of the Fuel Assembly , Yim J.S.(et al.) , Journal of the KNS / v.27,pp.803-810,
    11. KWU DRT on Fuel Assembly Vechanical Design and Engineering / v.,pp.,
    12. Elastic Stiffness Analysys of Leaf Type Holddown Spring Assemblies , Song K. N.;(et al.) , Journal of the Korean Nuclear Society / v.27,pp.760-766,
    13. A study on the Characteristic Analysis of Superpased Leaf Springs with Geometric and Material Nonlinearities , Kim H.K.;(et al.) , Journal of the KSME / v.14,pp.12-22,

 저자의 다른 논문

  • Song, Kee-Nam (30)

    1. 1993 "판형 홀드다운 스프링 집합체의 강성해석" 大韓機械學會論文集 17 (1): 215~222    
    2. 1995 "판형홀드다운 스프링 집합체의 탄성 강성도 해석" Journal of the Korean Nuclear Society = 원자력학회지 27 (5): 760~766    
    3. 1997 "너비감소 판형 홀다운스프링 집합체의 탄성강성도 평가" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. A. A 21 (1): 180~187    
    4. 1997 "판형 홀다운스프링 집합체의 탄성강성도 민감도 평가" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. A. A 21 (8): 1276~1290    
    5. 1997 "공액근사개념과 Loubignac의 반복계산법을 이용한 국부응력장 개선에 대한 연구" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. A. A 21 (10): 1598~1608    
    6. 1997 "이종재료로 구성된 영역의 응력장 해석 개선방안 연구" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. A. A 21 (11): 1844~1851    
    7. 1998 "변위형 유한요소 해에서 국부응력장 향상에 대한 연구" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. A. A 22 (2): 278~288    
    8. 1998 "A Study on the Improvement of Stress Field Analysis in a Domain Composed of Dissimilar Materials" Journal of the Korean Nuclear Society = 원자력학회지 30 (3): 202~211    
    9. 1998 "Verification and Sensitivity Analysis on the Elastic Stiffness of the Leaf Type Holddown Spring Assembly" Journal of the Korean Nuclear Society = 원자력학회지 30 (4): 287~297    
    10. 1999 "Derivation of the Extended Elastic Stiffness Formula of the Holddown Spring Assembly Comprised of Several Leaves" Journal of the Korean Nuclear Society = 원자력학회지 31 (3): 328~334    

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