Jacket platforms are life bloods of oil-rich countries and one of the well-studied offshore structures subjected to environmental loads. In the Persian Gulf, wave loads are the dominant load in designing procedure. Vibration control of jacket platforms is always one of the important issues for demanding re-quirements such as production activity, safety and serviceability. Tuned Mass Damper (TMD) is one of the well-established control systems in this context. The present study investigates the dynamic behavior of the Ressalat platform located in the Persian Gulf under the wave loads. An Active Tuned Mass Damper (ATMD) is employed for vibration control, while taking the actuator saturation into account. A fuzzy controller is applied to calculate the control force. Moreover, the Harmony Search Algorithm (HSA) is examined to optimize the power of the actuator in the control system. Results obtained through this study indicate superior performance of the proposed ATMD in comparison to the TMD, leading to significant reduction in vibration of the Ressalat platform under studied wave loads.
