Multi-physical field coupling simulation method and system for submarine high-pressure blow-off pipeline system

Abstract

The invention discloses a multi-physical field coupling simulation method and a multi-physical field coupling simulation system for a submarine high-pressure blow-off pipeline system. The method comprises the steps of establishing a three-dimensional geometrical model of a high-pressure blow-off system pipeline; performing finite element mesh division and boundary condition setting on the three-dimensional geometrical model of the high pressure blow-off system pipeline; performing fluid mechanic simulation calculation to obtain flow field characteristics in the high-pressure blow-off system pipeline and flow-induced noise characteristics in the blow-off system; performing simulation analysis on a fluid-solid coupling problem of the high-pressure blow-off system pipeline based on a multi-physical field fluid-solid coupling simulation calculation method; performing transient acoustic boundary element simulation calculation by use of an acoustic simulation calculation method based on a fluid-solid coupling simulation calculation result; and performing qualitative and quantitative analysis on flow field noises, flow-induced noises and vibration noises of the system pipeline and a watertank based on the multi-physical field fluid-solid-sound coupling simulation method. Through the multi-physical field coupling simulation means, the invention provides a noise prediction system for the submarine high-pressure blow-off pipeline system.

Description

technical field [0001] The invention relates to the internal flow field, structural vibration, flow-induced and vibration noise characteristics analysis of a submarine high-pressure blow-off pipeline system, and in particular to a multi-physical field coupling simulation method and system for a submarine high-pressure blow-off pipeline system. Background technique [0002] Submarine is an important weapon and equipment of navies all over the world. It has the characteristics of good concealment and strong maneuverability, and is widely used in underwater reconnaissance and assault operations. my country has a coastline of 18,000 kilometers and a marine exclusive economic zone of 3 million square kilometers. Submarines play an important role in defending my country's maritime rights and homeland security. [0003] The noise produced by the submarine when it moves underwater is the Achilles heel of its existence and directly threatens the safety of the submarine. Therefore, co...

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Problems solved by technology

Moreover, this kind of vibration noise may resonate at certain frequencies due to the inherent characteristics of the structure, thereby further enhancing the vibration noise

In addition, with the increase of pipeline air pressure, the pulsating pressure on the pipeline, valve parts and water tank wall will increase rapidly, which will correspondingly lead to the increase of displacement deformation and vibration noise

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