Effect of excitation frequency on the liquid sloshing in spherical tanks with baffle

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (22) : 257-262.

MA Liang 1 LIU Hao 1 WEI Cheng 1 TANG Liang 2 ZHAO Yang 1

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Abstract

The smoothed particle hydrodynamics (SPH) was utilized to solve the liquid sloshing in spherical tanks of spacecraft. The numerical solutions of Navier-Stokes equations were deduced, along with the artificial viscosity and pressure term appropriately expressed and the boundaries properly dealt with by using the dynamic boundary treatment. Two kinds of spherical tanks were built, one with baffle and the other without. Two types of harmonic excitations were designed, the force type and the motion type,with three different frequencies. The force applied on the bulkhead and the pressure at measuring points were measured. The simulation results show that: when the excitation frequency is 1.5 Hz, the force applied on bulkhead reaches its maximum. The pressure curve at the measuring point beneath liquid level has “double-peak”, the baffle can balance the two peaks and decrease the maximum pressure. The pressure curve at the measuring point over liquid level is of the form of “impulse wave”, the depression effect of baffle enhances with the increase of frequency.

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smoothed particle hydrodynamics / liquid sloshing / spherical tank / baffle / large amplitude sloshing

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MA Liang 1 LIU Hao 1 WEI Cheng 1 TANG Liang 2 ZHAO Yang 1. Effect of excitation frequency on the liquid sloshing in spherical tanks with baffle[J]. Journal of Vibration and Shock, 2019, 38(22): 257-262

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