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Case Study - Comparative Structural Analyses for Dynamically Sensitive Platforms


 Low frequency platforms with a natural period above 3.0 seconds are sensitive to the wave induced forces. The present paper discusses the available methods in offshore industry to carry out the Extreme Wave Analysis (also called as Dynamic Inplace Analysis). The paper also compares the results of these methods with the normal approach of amplifying the wave load using a factor called Dynamic Amplification Factor (DAF). It finally gives a threshold limit based on the platform period for the use of appropriate method of Extreme Wave Analyses.