Application of de-singularized boundary element method in simulation of a liquid tank sloshing

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (19) : 69-73.

WANG Qingfeng, XU Gang, WANG Shuqi, ZHU Renqing

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Abstract

The traditional frequency domain method has large limitations to simulate liquid sloshing in a tank.It only can be used to calculate a system’s response of each frequency under linear condition.The system’s responses under irregular excitations can be obtained with the spectral analysis method.Here, a method called DBIEM (de-singularized boundary integral element method) was proposed.Based on DBIEM, a liquid dynamic numerical model was built to solve liquid sloshing problems in a tank.A calculation program was developed using FORTRAN to simulate liquid sloshing in tanks with arbitrary shape and size.Firstly, a liquid tank sloshing problem was simulated under a single direction excitation.Its result was compared with its analytic solution, and the correctness and accuracy of the proposed method were verified.Then, liquid tank sloshing problems were simulated under irregular excitations.The results showed that the proposed method can be used to effectively simulate liquid tank sloshing problems.

Key words

Sloshing / DBIEM / Free surface / Random wave

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WANG Qingfeng, XU Gang, WANG Shuqi, ZHU Renqing. Application of de-singularized boundary element method in simulation of a liquid tank sloshing[J]. Journal of Vibration and Shock, 2018, 37(19): 69-73

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