Analysis of pitching motion on rectangular adequate with a baffle

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (8) : 54-59.

YING Lei1,ZHOU Ding1,FANG Zhongjie2

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Abstract

The sloshing response of liquid in a rectangular container with a rigid baffle under horizontal and pitching loads was studied. By introducing artificial interfaces, the complicated liquid domain was divided into several simple domains. Based on the superposition principle, the method of separation of variables was used to obtain the velocity potential of every subdomain. The potential function under horizontal loads was assumed to be the sum of impulse potential and convective potential. The convective potential was obtained by the mode superposition method. After substituting the impulsive and convective potential function into the free surface wave conditions, the dynamic response equations with generalized coordinates was established. According to equal dynamic shear and moment, the equivalent mechanical model under lateral loads was constructed. An approximate analysis of dynamic response of container under pitching excitation was carried out. The results calculated by the Newmark β method were compared with those obtained by the finite element method, which showed excellent consistency. Analysis of the length and height of baffle and the ratio of height to width of the fluid in the adequate was carried out. 

Key words

fluid-structure interaction / baffle / rectangular container / equivalent mechanical model / pitching motion;

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YING Lei1,ZHOU Ding1,FANG Zhongjie2. Analysis of pitching motion on rectangular adequate with a baffle[J]. Journal of Vibration and Shock, 2018, 37(8): 54-59

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