Research on Temperature Field and Thermal Stress of Liquefied Natural Gas Carrier with Incomplete Insulation

• Published in: Shanghai jiao tong da xue xue bao Vol. 15; no. 3; pp. 346 - 353
• Main Author: 丁仁风 唐文勇 张圣坤
• Format: Journal Article
• Language: English
• Published: Heidelberg Shanghai Jiaotong University Press 01-06-2010
• Subjects: Architecture; Carriers; Computer Science; Damage; Dangerous; Electrical Engineering; Engineering; Exposure; Failure; Hulls; Hulls (structures); Insulation; Leakage; Life Sciences; Liquefied natural gas; Materials Science; Mathematical analysis; Membranes; Perlite; Plywood; Simulation; Temperature distribution; Thermal stresses; U 663.85; thermal stress; liquefied natural gas (LNG) carrier; temperature field; incomplete insulation
• ISSN: 1007-1172; 1995-8188
• DOI: 10.1007/s12204-010-1015-1

The insulation of membrane type liquefied natunal gas （LNG） carrier is composed of plywood boxes filled with perlite. Within the service period, considering of the effects of load conditions, such as sloshing, wave load, it is possible to have some damage of the plywood box, leakage of perlite, and failure of the insulation box. LNG carrier without whole protection of effective insulation is dangerous. Hull structure is extremely fragile when exposed to ultra-low temperature. In order to solve these problems, firstly a study on insulation boxes＇ character and work condition is carried out and some presuppositions of partial disabled insulation are put forward. Secondly the thermal system of LNG carrier is analyzed to find out an effective way to simulate the thermal action of close air between outer and inner hull. Then a calculation about temperature field and thermal stress is done by MSC/PATRAN＆NASTRAN. At the end it is concluded that LNG carrier with incomplete insulation is dangerous and needs to be avoided.