Method for establishing shaking model of liquid in horizontal cylindrical liquid tank with horizontal side baffle

Abstract

The invention relates to the field of kinematics and dynamics modeling, and discloses a method for establishing a shaking model of liquid in a horizontal cylindrical liquid tank with a horizontal sidebaffle. The method is based on a two-dimensional fluid dynamics analysis method of a linear potential theory and is characterized in that the horizontal side baffle is added in the horizontal cylindrical liquid tank, a continuous conformal transformation technology is utilized to map a semicircular area with the horizontal side baffle into a rectangular area, and a Laplace equation and a linearized free liquid level condition are utilized to construct symmetric and antisymmetric vibration mode truncation linear system equations of shaking of liquid in the tank. Compared with the prior art, the method has the advantages that the problem of liquid shaking of the cylindrical container is simplified into the problem of determining the non-trivial solution characteristic value of the truncation linear system equation, the calculation efficiency is improved, and the established model effectively solves the problem of kinetic analysis of a tank truck with the horizontal side baffle.

Description

technical field [0001] The invention belongs to the field of kinematics and dynamics modeling, in particular to a method for establishing a liquid sloshing model in a horizontal cylindrical liquid tank with a horizontal side baffle. Background technique [0002] Sloshing is a physical phenomenon with practical significance and worthy of further study, which occurs in mobile vehicles loaded with liquid cargo, such as tank trucks, ships, rockets and spacecraft. In road traffic, liquid tank trucks have become one of the main vehicles for transporting petroleum and hazardous chemicals. During the steering and braking process, the external excitation will cause the liquid in the tank to slosh to generate sloshing force, thereby reducing the pressure of the liquid tank truck. Therefore, it is necessary to introduce anti-sloshing devices to analyze the influence of liquid sloshing on the stability of tank trucks. [0003] Although there are many literatures on liquid sloshing in v...

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Problems solved by technology

[0003] Although there are many literatures on liquid sloshing in vertical cylindrical tanks with various baffles, there are relatively few studies on sloshing analysis in horizontal cylindrical liquid tanks with horizontal side baffles, and there is no strict theory and numerical analysis in this regard. Analysis of the effect of liquid sloshing in the tank

Most of the traditional methods for building liquid sloshing models in tanks use grid division, such as Chinese patent document CN109753698A, which calculates the coordinate vector and velocity potential in the grid unit, the calculation is tedious and complicated, and the accuracy cannot be guaranteed

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