Dynamic Responses of Modular Hybrid Pier to Docking and Drifting Ships
Technical memorandum Oct 2002-Sept 2004
TEXAS A AND M UNIV COLLEGE STATION
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This task measures the dynamic integrity of a conceptual Modular Hybrid Pier MHP in the design operational and survival environments with a proven simulation model in a manner closely resembling hydraulic model testing in a towing tank. The effort encompasses series of numerical tests to quantify the behaviors of impinging ships, in active control or disabled, and their impacts on the pier in typical inland waters with currents and winds. These exercises addressed all operational and environmental parameters pertinent to the ship-fluid and ship-pier couplings observed in the relevant events. The impinging ship behaviors and pier responses are clearly traceable to the driving fluid and ship activities. The results conclude that routine ship docking is unlikely to damage the pier or degrade its operational efficiency. A pier with two founding shafts is sufficient to withstand the impact by docking ships or a drift ship in currents less than 1.5 ftsec. Four founding shafts are required to survive the impact by a drift ship in the design current of 2.3 ftsec identified for the potential future pier sites. The pier displaces extensively once the interior fenders buckle and vibrates noticeably after the impact loads subside.
- Marine Engineering