Thermal-mechanical Coupled Analysis of the Inner Tank of Large-scale LNG Storage Tank | |
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( Volume 1 Issue 1,July 2015 ) OPEN ACCESS | |
Author(s): | |
Lan Zhang, Xue Yang | |
Abstract: | |
With the development of LNG industry and the change of energy structure, large LNG storage tanks are used widely when the requirements of transportation and environmental protection are considered. So, how to ensure the safety of storage tank is very important. Mechanical properties of the inner tank of large-scale LNG storage tank directly affect the reliability of the whole tank because of it contacts with the liquid directly. Based on the finite element method, the finite element model of the inner tank was built, and its stress was analysed. The results show that the stress in the state that has no thermal coupling significantly lower than it in the state that has thermal coupling, so the temperature load is the main load of the inner tank. The stress of inner tank is controlled by the thermal expansion coefficient of material. The maximum stress of tank linearly increases with the increasing of thermal expansion coefficient and wall thickness. Those results can provide a reference for the overall design of large-scale LNG storage tank and the failure analysis. |
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