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LNG independent C-type liquid cargo tank structural analysis method considering oscillation loads

A technology for structural analysis and cargo tanks, applied in geometric CAD, special data processing applications, instruments, etc., can solve problems such as the impact of sloshing load on the structural strength of tanks, and achieve the effects of low cost, enhanced accuracy, and no trouble.

Inactive Publication Date: 2017-01-04
DALIAN UNIV OF TECH
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Problems solved by technology

However, in addition to the liquid cargo tanks of LNG carriers, LNG bunkering ships, marine fuel tanks and floating LNG production and liquefaction storage equipment will have half-load conditions in the tanks due to their operating methods, and the sloshing load will affect the structure of the tanks. Intensity has a greater impact

Method used

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  • LNG independent C-type liquid cargo tank structural analysis method considering oscillation loads
  • LNG independent C-type liquid cargo tank structural analysis method considering oscillation loads
  • LNG independent C-type liquid cargo tank structural analysis method considering oscillation loads

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Embodiment Construction

[0020] The following for the attached figure 1 The calculation flow of the present invention will be described in detail in conjunction with other drawings.

[0021] (1) Establish a CFD-based computational theoretical model

[0022] figure 2 It shows the CFD calculation theoretical model established for sloshing load prediction, and the model includes tank body 1 and reinforcement ring 2 .

[0023] (2) Determine calculation conditions and compile motion functions

[0024] Analyze the calculated working conditions to determine the motion amplitude of the independent C-type tank that excites LNG, including the amplitude of the translation direction and the angle amplitude of the rotation direction, as well as the frequency of the excitation motion; analyze the motion form and compile it into displacement or velocity function, as the input condition for the calculation.

[0025] (3) Divide the grid, set the calculation model and parameters and solve the problem

[0026] i...

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Abstract

The invention discloses an LNG independent C-type liquid cargo tank structural analysis method considering oscillation loads, and belongs to the field of naval architectures and ocean engineering. The method comprises the steps that 1, a real ship LNG independent C-type compartment is simplified into a theoretical model based on CFD calculation; 2, calculation working conditions are determined as calculation input conditions; 3, mesh generation is performed on the theoretical model, boundary conditions are designated, a turbulent flow and multi-phase flow model is selected, a CFD numerical simulation method is used for obtaining a calculation model flow field result; 4, a structural analysis model of the real ship LNG independent C-type compartment is built; 5, mesh generation is performed on the structural analysis model, material parameters of the structure are designated, and constraint conditions are built; 6, the flow field calculation result is adopted as loads of the structural analysis model; 7, the structural analysis model is obtained, and the calculation result can guide the optimal design of the LNG independent C-type compartment. Oscillation load analysis of the LNG independent C-type compartment is performed through numerical calculation, oscillation loads are accurately predicted, the influence of the oscillation loads on the structural strength is analyzed, and the design method for the ship LNG independent C-type compartment is formed.

Description

technical field [0001] The invention relates to a structural analysis method of an LNG independent C-type liquid cargo tank considering sloshing load, and belongs to the field of ships and ocean engineering. Background technique [0002] With the promotion of clean energy around the world, the LNG industry has attracted more and more attention. In the field of shipbuilding and shipping engineering, diesel and LNG dual-fuel marine main engines have been produced; in order to supply LNG fuel, LNG bunkering ships have also emerged as the times require. The ship-to-ship LNG refueling method can not only refuel LNG when the ship is in port, but also carry out LNG refueling when the ship stays at the anchorage or during the voyage, which facilitates the demand for LNG fuel by passing ships. Due to its relatively simple technology and low cost, the LNG independent C-type tank has become the preferred tank type for LNG fuel tanks, small and medium-sized bunkering ships, transport s...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15Y02T90/00
Inventor 林焰刘戈叶超裴斐王春雷蒋晓宁
Owner DALIAN UNIV OF TECH
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