This Study is about structural analysis of ball valve for controlling cryogenic LNG's flow or stop in normal temperature. The used valve is demanded safety resistance for inner pressure and temperature variation caused by using it in cryogenic, high pressure surrounding. This study evaluates for safety resistance for inner pressure and temperature variation by heat transfer analysis in cryogenic surrounding, heat stress analysis in temperature variation and deformation analysis in high pressure.

Abstract
 1. 서론
 2. 재료 및 방법
  2.1 이론적 배경
  2.2 볼밸브 3D 모델링
  2.3 유한요소 모델링 및 경계조건
 3. 결과 및 고찰
  3.1 내압에 의한 구조응력 및 변형 해석
  3.2 온도차에 의한 열전달 해석
  3.3 열팽창에 의한 응력 및 변형 해석
  3.4 내압, 열팽창에 의한 응력 및 변형해석
 4. 결론
 참고문헌

• 김진구(충북과학대학 기계자동차과) | J. G. KIM
• 함승덕(충북과학대학 기계자동차과) | S. D. HAHM
• 유찬욱(한국조선기자재연구원 에너지해양연구본부) | C. U. RYU