Risers are often exposed to harsh ocean environments, and vulnerable to various damages. The riser failure may cause serious economical losses as well as environmental problems. Therefore, maintaining the structural integrity of the riser is very important. This paper deals with the methodology for monitoring structural integrity of the riser using dynamic characteristic changes such as mode shapes. The damage index method, which has been proved its usefulness in many applications, is applied to a numerical study to test its feasibility of identifying damage in a riser. The numerical study is performed using OcraFlex 9.4, specialized program for analyzing marine structures. The numerical study shows that the damage index method can identify damage in the riser.

ABSTRACT
 1. 서 론
 2. 손상 탐지 이론
  2.1 손상지수법
 3. 수치해석을 통한 적용성 검토
  3.1 수치해석 모델링
  3.2 손상탐지 결과
 4. 결 론
 References

• 유용(한국교통대학교 철도시설공학과) | YooYong
• 최상현(한국교통대학교 철도시설공학과) | Choi Sanghyun
• 박수용(한국해양대학교 해양공간건축학과) | Park Sooyong
• 제현민(한국해양대학교 해양건축공학과) | Jae Hyunmin