Effect Of Internal Structure Of Liquid Tank On Liquid Sloshing

Liquid sloshing is widespread in natural environments and scientific projects such as the marine environment and aerospace.During the sloshing,an impact load is generated on the wall surface of the liquid tank,causing the structure to be unstable,and even in a serious case,the structure may be destroyed.Therefore,how to effectively control the sloshing and reduce the impact load to the liquid tank during sloshing is the current direction of engineering design and key research in many scientific research fields.In this paper,the finite difference method is used to solve the incompressible Navier-Stokes equation.The VOF method is used to capture the free surface.The self-developed numerical program is used to carry out the sloshing of the tank when adding two partitions in the three-dimensional rectangular tank.Study and analyze the inhibitory effect of the separator on liquid sloshing.Based on the above research work,the topology technology was extended to fluid sloshing,and the two partitions were topologically optimized to analyze the suppression of liquid sloshing by the topology optimization of the separator.Since the occurrence of sloshing is usually very random,this paper also explores the shape change of the partition after topology optimization under the external excitation of different frequencies and different amplitudes.The results show:1.In the case where two partitions are arranged in the tank,the fluctuation of the liquid surface during the sloshing of the liquid and the impact pressure on both sides of the partition plate are regularly changed.When the sloshing occurs for a period of time,the sloshing can become complicated due to other reason like the superposition of the speed,for example,the pressure on both sides of the partition and the fluctuation of the liquid surface can become disorganized.2.During the process of applying topology optimization to liquid sloshing,it can be found that the permeability parameter has a large range of variation at the beginning of sloshing,and the shape of the separator changes irregularly;when the sloshing tends to be stable,the water permeability also begins to change regularly.Finally,after averaging treatment,the optimized separator shape is obtained,and it is verified that the optimized double separator can effectively reduce the liquid impact force of the wall surface.3.Under the external excitation of different amplitudes and different frequencies,the first partition obtained after topology optimization has similar morphology and is strip-like structure.There are three impervious zones at the liquid level,about one-third below the liquid level and at the bottom of the tank;the shape of the second partition obtained by topological optimization is different.