Method for establishing liquid shaking model in horizontal cylindrical liquid tank with longitudinal baffles

Abstract

The invention discloses a method for establishing a liquid shaking model in a horizontal cylindrical liquid tank with longitudinal baffles. The method belongs to the field of kinematics and dynamics modeling. The method is based on the equivalence of a transverse shaking model of the horizontal cylindrical container; dividing a liquid semi-free liquid level grid by utilizing a boundary element method; calculating the generalized coordinate vectors i and i of the grid units and the speed potential (shown in the specification), and establishing a constraint equation of the grid units, wherein the constraint equation is shown in the specification; and establishing a system dynamics and kinematics equation based on the Laplace equation and the Green formula, and solving to obtain a lateral force and a roll moment generated by liquid shaking on the tank wall and the baffle plate. The boundary element method adopted by the invention improves the calculation efficiency, and the established multi-modal model effectively solves the dynamic analysis problem of the tank truck with the longitudinal baffle plate.

Description

technical field [0001] The invention belongs to the technical field of kinematics and dynamics modeling, and in particular relates to a method for establishing a liquid sloshing model in a horizontal cylindrical liquid tank with a longitudinal baffle. Background technique [0002] The sloshing of the liquid in the tank refers to the movement of the free surface of the liquid due to external disturbance or excitation. Liquid sloshing analysis is not only of great significance to aerospace and ships, but also very important to the transportation of liquid tank trucks. In recent years, the rollover accidents of oil tank trucks have increased year by year, causing heavy casualties and property losses. With the development of the economy, the tanker is one of the main transport vehicles for transporting hazardous chemicals. The goods transported by the tanker are generally liquid hazardous chemicals. Due to the sloshing characteristics of the liquid, when the tanker is subjected...

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Problems solved by technology

[0004] The present invention aims at the shortcomings of the modeling method for liquid dynamics research in the prior art, and proposes a method for establishing a liquid sloshing model in a horizontal cylindrical liquid tank with longitudinal baffles. The multi-modal model established by this method is effective Problem solved for dynamic analysis of tank trucks with longitudinal baffles

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