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Numerical simulation on sloshing in 3D rectangle liquid tank under error excitation

CHEN Shiwen;YANG Zhixun;YANG Yucheng;RUAN Shilun;YUE Qianjin;State Key Laboratory of Structural Analysis for Industrial Equipment;Department of Engineering Mechanics,Dalian University of Technology;  
The radom slight change of original excitation would cause uncertain effect on sloshing load,which leads to strong stochastic and nonlinear phenomenon. A numerical model at 85% filling level is built for a 3D rectangle tank by Computational Fluid Mechanics( CFD) method,and the sloshing test is performed for the models under the same conditions; by comparing the free surface change and the timehistory of sloshing impact pressure,the validity of the numerical model is verified. The error excitations with certain value( 2%,5% and 10%) are given from the original excitation,under which the timehistory curves of sloshing load of the detecting zone of the up-corner are obtained. The research results indicate that,there are similar sloshing wave form and frequency under different error excitation,but the deviation of pressure peak would not present positive correlation effect with error magnitude,and the maximum difference value is 33. 17%; moreover,a slight excitation error would cause higher change of sloshing impact pressure error.
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