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| Fatigue Life Analysis Methods for Pump Tower of Liquefied Natural Gas Carrier under Sloshing Load |
| ZHANG Ai-Qing, XUE Hong-Xiang, TANG Wen-Yong |
| (State Key Lab. of Ocean Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract This paper mainly researched on the pump tower structure fatigue life under sloshing loads in liquefied natural gas carrier. The motion of the hull is calculated using the dynamic load method. Based on the seakeeping results, the critical sloshing movement of the ship is selected according to ABS rules. The sloshing load is obtained using Morison formula based on the results of velocity and acceleration calculated by 2D sloshing program. Fatigue life of the pump tower is predicted using cumulative fatigue damage theory and the relation of fatigue damage degree to loading level is concluded.
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Received: 24 November 2010
Published: 30 March 2012
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