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Abstract

In this study, a plane frame element derived from vector form intrinsic finite element (VFIFE) method is adapted and applied to study the dynamic responses of an offshore template platform subject to wave forces. Furthermore, this vector form intrinsic finite element is modified in order to incorporate a visco-elastic material, which has excellent energyabsorption ability, to a damping device installed in the structural system to mitigate the wave-induced vibration. The method adopted in this study is a scheme similar to the one by updating the geometry of the structural system during the calculation of each time step, which is also called the coordinate moving frame approach. It is found from the analytical results that an offshore template structure enhanced with VE damper has better performance on its dynamic responses., The mitigation on the response amplitude is significant and the resonant vibration coinciding to the fundamental frequency of the structural system can be mitigated into a very small value after a few cycles of vibration

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