The Comparison Of Experimental And Numerical Study Of Sloshing Loads In2-D Rectangular Tank

Liquid transport equipment or equipment contains liquid tank is going to be large-scale. Especially with the widespread use of natural gas, the demand for large cryogenic liquid transport equipment becomes greater. In the Naval Architecture and Ocean Engineering field, LNG (Liquid Natural Gas) and FLNG (Floating LNG) are two representative carrying equipment for the cryogenic liquid. The special environment contains wind, wave and flow of ship determines complex response in six degrees of freedom, which cause sloshing of the cryogenic liquid inside of partially filled tanks in the ship. And sloshing loads is a key factor affecting the security of tank structure, ship motion and stability that decides the safety of LNG and FLNG. Therefore how to analyze the sloshing phenomenon, evaluate the sloshing loads and reduce the loads in the design of LNG and FLNG is an important problem in the engineer field. In order to improve the credibility of the research result in complex tanks under real excitation, there is a comparative study of sloshing loads in2-D rectangular tank under roll excitation using experiment and numerical method under the same conditions in this paper. By analyzing and comparing the result of each method, the differences between experiment and numeric can be found. Summarizing the difference as well as the causes of discrepancy can propose some improvement measures for both experiment and numeric. So that the reliability of further study about sloshing in complex conditions can be improved. Combining the results of two methods, the basic laws of sloshing loads are presented in this paper, including the distribution law of sloshing impact pressure along the sensor location and the law of sloshing impact pressure change along the excitation frequency and amplitude. These basic laws can be used for further study of sloshing loads, liquid tank design and even LNG or FLNG design.