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Near-field acoustical holography reconstruction method based on equivalent source method

A near-field acoustic holography and equivalent source technology, which is applied in the field of acoustic holography, can solve the problems of non-unique processing of the solution at the characteristic wavenumber of interpolation operation, low calculation efficiency and calculation accuracy, etc., and achieves the effect of improving calculation efficiency and calculation accuracy.

Inactive Publication Date: 2014-04-23
GUANGXI UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0002] The near-field acoustic holographic reconstruction method based on the boundary element method is suitable for near-field acoustic holography of sound sources with arbitrary shapes, but in the reconstruction process, there are complex interpolation operations, singular integral processing, and non-uniqueness of the solution at the characteristic wave number processing and other issues, making the calculation efficiency and calculation accuracy of this reconstruction method relatively low

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Embodiment Construction

[0007] Preferred embodiments of the present invention are described below, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0008] The near-field acoustic holographic reconstruction method based on the equivalent source method regards the radiation sound field of a vibrating radiating object as the superposition of sound fields generated by a series of equivalent sources arranged in the radiating body, and the sources of these equivalent sources The intensity can be obtained by matching the normal vibration velocity of the surface of the radiator, and then calculate the acoustic radiation.

[0009] The invention provides a near-field acoustic holographic reconstruction method based on an equivalent source method, which is not only suitable for near-field acoustic holography of sound sources with arbitrary shapes, but also improves calcul...

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Abstract

The invention provides a near-field acoustical holography reconstruction method based on an equivalent source method. A radiated sound field of a vibration radiator is considered to be formed by a superposition of sound fields generated by a series of equivalent sources arranged in the radiator. Source intensity of the equivalent sources can be obtained by normal velocity matching of the radiator surface. Thus, sound radiation is calculated. The near-field acoustical holography reconstruction method based on the equivalent source method is suitable for near-field acoustical holography of sound sources of arbitrary shapes and is adopted to raise computational efficiency and computational accuracy.

Description

technical field [0001] The invention relates to a near-field acoustic holographic reconstruction method based on an equivalent source method, and belongs to the technical field of acoustic holography. Background technique [0002] The near-field acoustic holographic reconstruction method based on the boundary element method is suitable for near-field acoustic holography of sound sources with arbitrary shapes, but in the reconstruction process, there are complex interpolation operations, singular integral processing, and non-uniqueness of the solution at the characteristic wave number Processing and other issues make the calculation efficiency and calculation accuracy of this reconstruction method relatively low. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome existing defects, provide a near-field acoustic holographic reconstruction method based on the equivalent source method, and improve calculation efficiency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
Inventor 向宇胡金意
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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