Transcription of 1. Ocean Wave Spectra - MIT OpenCourseWare
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1. Ocean Wave Spectra - MIT OpenCourseWare
Design Principles for Ocean VehiclesReading # Design Principles for Ocean Vehicles Prof. Techet Spring 2005 1. Ocean Wave Spectra 1. Wave energy Spectra . Red text indicates wave generation mechanisms and blue text indicates damping/restoring forces. The majority of Ocean waves are wind generated. Other wave generating mechanisms include earthquakes and planetary forces. Planetary forces drive tides and cause long 2004, 2005 A. H. Techet 1 Version , updated 2/24/2005 Design Principles for Ocean VehiclesReading # period waves on the order of 12 to 24 hours. Earthquakes are the major cause of tsunamis which, while rare, can be catastrophic if the earthquake occurs near or on the coast. waves also encounter forces that tend to restore them to a flat surface.
Feb 24, 2005 · 13.42 Design Principles for Ocean Vehicles Reading # replaced the Pierson- Moskowitz spectrum as the ITTC standard. 4 S + = 1 25 w m -125 (ww)4 w. m. z e (7) 4 w5 where again, z is the significant wave height, z ” H 13 / = 4 M , (8) o
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