Simulation and Laboratory Tests of Ice Induced Offshore Structure Vibrations

• Main Authors: Justin Hovland, Mentor Dr. Yuefang Wang
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Sea ice
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.488.48; http://people.clarkson.edu/projects/reushen/reu_china/Website/assets/participants_assets/Reports/Justin.pdf

This paper describes the dynamic testing of an offshore oil platform laboratory model outfitted with rubber-steel isolators and its accompanying computer model in ANSYS. Three different input excitation signals were used: harmonic sine waves, random ice loads, and fixed ice loads. The ice loads were composed of triangular force impulses and were designed to replicate a realistic loading situation for a structure subjected to flowing sea ice. The isolators were found to effectively reduce large accelerations onboard due to the jarring nature of an ice load. Also, the fixed ice load was deemed the best load to use in the testing of offshore structures subjected to ice loading.