STRUCTURAL ANALYSIS OF LNG PUMP TOWER

In this paper, the problem of dynamic analysis of an LNG pump tower which is the largest structure inside the LNG tank is studied. Severe environmental loading conditions including the thermal effect and the sloshing force from the motion of LNG are considered. The sloshing force is calculated by the SLOSH program and applied to structural analysis. Spectral analysis is performed based on response amplitude operators of ship motion responses such as surge, sway, roll and pitch to obtain a tank excitation condition for sloshing analysis. The excitation amplitude and period are calculated for two cases: the extreme condition of the ship motion and the resonance of ship and tank fluid motions for several filling ratios. Torque effect and gravity effect are also considered. Some load cases are combined adequately to represent real operating situations. Calculated examples based on the proposed new scheme have been chosen to show that the sloshing force is a very important design factor for the structural design of a tank and a pump tower.

• Supplemental Notes:
  • PRADS 95, 6th Intl Symposium on Practical Design of Ships and Mobile Units; 17-22 Sept 1995; Seoul, Korea. Procs. Publ by Soc Naval Architects of Korea, ISBN 89-950016-2-3. Vol 2, p 2.982 [10 p, 7 ref, 5 tab, 11 fig]
• Authors:
  • PARK, J H
  • Moon, S H
• Publication Date: 1995

Language

• English

Subject/Index Terms

• TRT Terms: Sloshing; Structural analysis
• Old TRIS Terms: Lng tanks
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00727801
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Nov 4 1996 12:00AM