The characteristics and effectiveness of double tuned mass dampers (DTMD) have been studied by many researchers. DTMD usually consists of one larger mass block and one smaller mass block. In this study, DTMD was proposed to reduce the vibration of vertical pumps in industrial plants. In order to assess the efficiency of the proposed method, numerical analysis for the simplified vertical pump model with single and double TMDs was carried out. It was also investigated that the effects of optimal TMD parameters such as frequency ratio and damping ratio on dynamic responses of the main structure. According to analysis results, DTMD are more effective to control the vibration of the vertical pump and show good robustness to the change in the stiffness of TMD.

Abstract
 1. 서론1
 2. 수직 펌프의 과도진동 특성
 3. 이중 동조질량감쇠기
 4. TMD가 설치된 수직 펌프의 응답
  4.1 단일 TMD가 설치된 구조물
  4.2 이중 TMD가 설치된 구조물
  4.3 단일과 이중 TMD 제어성능 비교
 5. 결론
 감사의 글
 References

• 문영종(에이치디엘(주), 공학박사, Heun Deul Lim Co., Ltd.) | Moon, Yeongjong
• 최현훈(에이치디엘(주), 공학박사, Heun Deul Lim Co., Ltd.) | Choi, Hyunhoon
• 김현수(선문대학교 건축사회환경학부 부교수, 공학박사, Div. of Architecture, Architectural & Civil Engineering, Sunmoon University) | Kim, Hyun-Su 교신저자