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Method for establishing sloshing numerical model of oil in vehicle-mounted metal oil tank

A technique for establishing a method and a numerical model, which is applied in the field of establishing a numerical model of oil sloshing inside a vehicle-mounted metal oil tank, and can solve problems such as difficult to grasp dynamic behavior, oil sloshing in the tank, structural strength of the tank body and rollover stability, etc. , to achieve the effect of improving driving stability and safety, saving calculation time, and high precision

Inactive Publication Date: 2017-12-05
LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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Problems solved by technology

[0005] (3) The oil in the tank shakes greatly during emergency braking or turning, which has a great impact on the structural strength of the tank and the rollover stability
However, this kind of model can only explain the fluid dynamic behavior of the dominant order, and it may be difficult to grasp the dynamic behavior of higher order frequencies.

Method used

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  • Method for establishing sloshing numerical model of oil in vehicle-mounted metal oil tank
  • Method for establishing sloshing numerical model of oil in vehicle-mounted metal oil tank
  • Method for establishing sloshing numerical model of oil in vehicle-mounted metal oil tank

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Embodiment Construction

[0115] 1. Basic equation of oil sloshing

[0116] The three-dimensional model of the vehicle-mounted metal oil tank and the established coordinate system are as follows: figure 1 As shown, the coordinate system x in the figure 0 ,y 0 ,z 0 It is a coordinate system fixed on the earth. The coordinate system x, y, z is a body coordinate system established in the center of the oil tank and moving together with the oil tank. When the oil tank is at rest, y 0 The directions of and y are both perpendicular to the ground and upward.

[0117] The oil loaded in the oil tank can be regarded as a viscous incompressible fluid, and the density ρ is a constant. In the analysis, the transfer of heat energy between the fluid and the outside is not considered. In the fixed coordinate system x 0 ,y 0 ,z0 Next, the fluid motion governing equation is:

[0118] continuity equation

[0119] momentum equation Fluid Volume Fraction Transport Equation

[0120] In the formula, is the fix...

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Abstract

The invention discloses a method for establishing a sloshing numerical model of oil in a vehicle-mounted metal oil tank. The method comprises the steps of building an oil sloshing basic equation, determining boundary conditions of oil sloshing, carrying out stress analysis on a solid structure region and the like. A VOF method and a dynamic coordinate system are used for establishing a three-dimensional simulation model for sloshing of the oil in the vehicle-mounted metal oil tank, wherein the three-dimensional model is established according to actual sizes of a tank body, an internal medium and a swash plate, and coupling analysis of stress and deformation of a solid tank wall region can be achieved. An inertia force function corresponding to the change of braking deceleration in the braking process of a tank truck is loaded into a momentum equation to be solved, the calculation time is saved, and the higher precision is guaranteed. The method can be mainly used for researching the side turning stability during emergency turning of the off-road metal oil tank truck and the structural strength of the tank body during emergency braking.

Description

technical field [0001] The invention relates to the analysis field of oil slosh in metal oil tanks, in particular to a method for establishing a numerical model of oil slosh inside a vehicle-mounted metal oil tank. Background technique [0002] Vehicle-mounted metal oil tanks are an important part of refueling trucks. They need to be fixed on the chassis frame in a certain way. It is very difficult to analyze its stress state and calculate the structural strength. During use, the tank body often cracks or the tank body is designed out of order. Very bulky, increased consumables, resulting in unnecessary waste and so on. Its main features are: [0003] (1) The oil tank is installed on the chassis, and the tank body is in motion with the chassis when the vehicle is driving. The stress of the oil tank is different from that of the horizontal metal oil tank for static oil storage. In addition to bearing air pressure, hydraulic pressure, and the weight of the tank body , but al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/23G06F2119/06
Inventor 左永刚陈军杨静陈曦于江张镇叶有义黎波徐洋
Owner LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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