This paper discusses the importance of dynamic effects on load predictions and structural responses for various types of offshore structures. In addition to wave, wind and current loads, seismic and vibration analyses are emphasized for pile-supported structures. When floating platforms are considered, emphasis is focused on motion and wave load calculations. The calculation procedures and the dynamic effects are illustrated through numerical examples of both bottom-supported and floating platforms.

A sample application of 20-year hindcast wave data is given for predicting wave loads on a column-stablized unit in the Celebes Sea. Problem areas which deserve further research are also identified in the paper.

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