Abstract
With reference to the Sea deep water jack-up off shore platform, designs an experimental model of offshore platforms. Modal experimental system is developed! the vibration mode experiment of similar model is done. TMD design of tuned mass damper (TMD) for damped linear structures has attracted considerable attention in recent years. Some approximate expressions of optimal tuning ratio of a TMD attached to a damped linear structure have been proposed tuned mass damper (TMD) has been extensively used in vibration control of engineering structures. Experiment results show that TMD can greatly reduce the response of elastic structures under wind, water waves, and earthquakes. Vibration experiment of a offshore plant modeled as a single-degree-of-freedom (SDOF) system subjected to the 1940 HACHI-NS earthquake vibration. It is demonstrated that TMD can reduce the peak displacement effectively. The current study also shows that the TMD performs well in a low-intensity earthquake, inwhich the TMD is inactivated due to friction.
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