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      https://www.riss.kr/link?id=A75896473

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      다국어 초록 (Multilingual Abstract)

      The spacer grid is one of the main structural components in the fuel assembly, which supports the fuel rods<br/>
      and maintains coolable geometry from an external load. A vibration test and a finite element analysis using<br/>
      ABAQUS on a dummy fuel rod continuously supported by Optimized H type(OHT) and New Double<br/>
      Plate(NDP) spacer grids are performed to obtain the vibration characteristics such as natural frequencies and<br/>
      mode shapes and to verify a finite element model. The results fro m the test and the finite element analysis are<br/>
      compared by modal assurance criteria (MAC) values. It is resulted that MACs for the first, the third and the<br/>
      fifth mode shapes are relatively good as compared with those of the second and fourth ones. The natural<br/>
      frequency differences between two methods as well as the mode comparison results for the rod with OHT<br/>
      spacer grid are better than those with NDP spacer grid. It is judged that the FE model for the NDP spacer grid<br/>
      spring should be modified to consider the long contact length which actually happen when the spring supports<br/>
      the rod.
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      The spacer grid is one of the main structural components in the fuel assembly, which supports the fuel rods<br/> and maintains coolable geometry from an external load. A vibration test and a finite element analysis using<br/> ABAQUS on a d...

      The spacer grid is one of the main structural components in the fuel assembly, which supports the fuel rods<br/>
      and maintains coolable geometry from an external load. A vibration test and a finite element analysis using<br/>
      ABAQUS on a dummy fuel rod continuously supported by Optimized H type(OHT) and New Double<br/>
      Plate(NDP) spacer grids are performed to obtain the vibration characteristics such as natural frequencies and<br/>
      mode shapes and to verify a finite element model. The results fro m the test and the finite element analysis are<br/>
      compared by modal assurance criteria (MAC) values. It is resulted that MACs for the first, the third and the<br/>
      fifth mode shapes are relatively good as compared with those of the second and fourth ones. The natural<br/>
      frequency differences between two methods as well as the mode comparison results for the rod with OHT<br/>
      spacer grid are better than those with NDP spacer grid. It is judged that the FE model for the NDP spacer grid<br/>
      spring should be modified to consider the long contact length which actually happen when the spring supports<br/>
      the rod.

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      목차 (Table of Contents)

      • Abstract
      • 1. 서론
      • 2. 진동시험
      • 3. 유한요소해석
      • 4. 결과 및 고찰
      • Abstract
      • 1. 서론
      • 2. 진동시험
      • 3. 유한요소해석
      • 4. 결과 및 고찰
      • 5. 결론
      • 후기
      • 참고문헌
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