Liquid tank optimum design method based on load in severe sloshing inside liquid cargo ship

Abstract

The invention relates to a liquid tank optimum design method based on a load in severe sloshing inside a liquid cargo ship. The liquid tank optimum design method includes the following steps: firstly, identifying the hydrodynamic performance of the liquid cargo ship by calculating the response amplitude operator and the motion acceleration of every liquid tank in the liquid cargo ship; secondly, analyzing the long-term motion response of the liquid cargo ship by combining the period distribution of wave heights with the distribution probability of wave directions in actual operating waters of the liquid cargo ship; thirdly, calculating the natural periods of traverse sections and vertical sections of the liquid tanks with various liquid carrying rates; fourthly, calculating the load in server sloshing of the liquid tanks by integrating all elements and drawing a sloshing wave condition critical curve graph to select sloshing wave critical conditions resulting in the severe sloshing inside the liquid tanks; fifthly, calculating the load pressure distribution on the walls of cabins by integrating basic parameters of the cabins, comparing maximum loads in severe sloshing of various liquid tanks with different shapes of sections and sizes with each other to obtain relatively optimum sections and sizes of liquid tanks adapting to operating in the actual operating waters. The liquid tank optimum design method has the advantages of being good in calculation speed, high in calculation accuracy, and simple and practical in use, and provides liquid tank optimum selection with important theoretical basis.

Description

technical field [0001] The invention relates to a design method for a tank of a tanker, in particular to an optimal design method for a tank based on the violent sloshing load in the tank of the tanker. Background technique [0002] Sloshing refers to the phenomenon of liquid level fluctuation in a container partially filled with liquid. This is a physical phenomenon that exists widely in nature and is involved in engineering fields such as aerospace, petrochemical, marine and shipbuilding. With the continuous development of the world's shipping industry and the increasing demand for clean energy in countries around the world, the number of LNG / LPG carriers is increasing year by year. At the same time, with the development of deep-sea gas fields, the marine engineering community has proposed a large-scale floating liquefied natural gas production storage and unloading device (FLNG) in recent years. Generally, for tankers transporting LNG / LPG, etc., there is a state that the...

AI Technical Summary

Problems solved by technology

If the above factors are considered one by one, even if only 10 cases are considered for each influencing factor, the total number of working conditions will reach 1000, and the calculation of tank sloshing load is very time-consuming, such a large number of calculation working conditions makes the calculation time unbearable , and this calculation is also very rough, so it cannot fully capture the maximum load of tank sloshing

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