Sloshing Load Analysis For FLNG Tank Design

FLNG(Floating Liquid Nature Gas) is specially designed to exploit the marginal nature gas field in far and deepwater area. The conception design of cargo tank of FLNG system is similar to the LNG vessel, in which membrane tank is most widely used, but the sloshing force of FLNG tank will much severe than LNG tank, Considering the special operating mode, FLNG tank will often in unloading state, and the movement of the waves can cause hull cabin fluid sloshing motion. Sloshing on the bulkhead structure and the stability of the floating body can bring adverse effect. The membrane tank bulkhead structure is complicated, especially the thermal insulation layer, is a variety of composite superposition, once the leakage occurs, the consequences will be unbearable to contemplate. Due to fluid motion randomicity, complexity, using theoretical analysis and numerical simulation method to study have certain limitations, and the model experiment method is can make up for the limitations of other methods. In this paper the model test system for studying the sloshing force is established and series test were conduct based on specially designed semi-physical experiment system Teh sloshing load characteristics is analyzed by test data. As the real tank is very large in size, adiabatic layer complex structure, difficult to simulate in the laboratory, at the same time the industry has not formed the standard experiment for reference, on experimental studies presents a challenge. Based on the analysis of the related areas of international research foundation, from the design principle, the establishment of large scale GTT tank model, with large motion platform, complex issue simplification. According to the1:20tank models in different motion excited by sloshing research, gives the film type tank general sloshing load distribution and risk carrier liquid condition prediction, as the tank structure design to provide the reference, but also to promote the domestic large-scale rock load experimental research base and experimental approaches to the development of. Future work includes the development and improvement of rock experiment technology, based on sloshing load structure response and the fluid-solid coupling analysis.