Modal Characteristics and Vibration Control of Cylindrical Shell Structure: Experimental Results Comparison in the Air and Water

실린더형 쉘 구조물의 모드 특성 및 진동제어: 공기중 및 수중 실험결과 비교

In the present paper, dynamic characteristics and vibration control performance of a cylindrical shell structure are experimentally investigated and results are presented in the air and underwater conditions. End-capped cylindrical shell structure is manufactured and Macro-Fiber Composite (MFC) actuators are attached on the inside-surface of the structure. Modal characteristics are studied in the air and under the water conditions and then equation of motion of the structure is derived from the test results. Structural vibration control performances of the proposed structure are evaluated via experiments with optimal control algorithm. Vibration control performances are presented both in the frequency and time domains.