지지격자로 지지된 모의 연료봉의 진동해석

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.

목차 (Table of Contents)

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