A Calculation Method of Geometric Divergence of Irregular Surface Sound Source Equivalent to Line Source

Abstract

The invention proposes a method for calculating the geometric divergence of an irregular-shaped surface sound source equivalent to a line source. In the method, the sound radiation energy of the surface sound source to the receiving point is equivalent to the sum of the sound radiation energy of each contour line of the surface sound source to the receiving point. First, according to the principle that the total sound power of the sound source is equal, the total sound power of the surface source is allocated to the boundary contour line of the surface source; then, the sound energy of the receiving point is calculated for any line sound source, and the sound energy of the whole line sound source at the receiving point is The power is the integral of the sound power at the receiving point under the source intensity per unit length over the length of the line source; finally, the sound energy of the receiving point is superimposed by each contour line to obtain the sound radiation of the entire surface source to the receiving point. The invention is applied to the calculation of sound geometric divergence of sound sources on irregularly shaped surfaces, and solves the problems of complex source intensity processing, low calculation accuracy and poor applicability in the calculation of sound source geometric divergence on complex boundary surfaces.

Description

technical field [0001] The present invention relates to the technical field of surface sound source sound emission and plane geometry, and more specifically, relates to a method for calculating the geometric divergence of an irregular surface sound source equivalent to a line source. Background technique [0002] In recent years, with the increase of people's environmental awareness, the quality of urban acoustic environment has become a problem that people pay more and more attention to. The vibration of the sound source forms a sound wave and propagates outward. The simplification, characteristics and spatial distribution of the sound source vary greatly with the type of sound source. Therefore, the divergence of sound from different types of sound sources in geometric space Law is a problem that scholars must face in both research and engineering. In real life, the shape of the sound source is complex and diverse, and it is difficult to accurately calculate the sound fie...

AI Technical Summary

Problems solved by technology

In the center of gravity substitution method, the surface sound source is replaced by a point sound source located at the geometric center of gravity of the surface source. Although this method greatly simplifies the calculation process, the calculation result is too rough and cannot be applied to the situation where the receiving point is close to the surface sound source. Happening

For the gridded point source replacement method, the surface sound source is gridded, and a series of point sound source arrays located in the center of the grid are used to replace the surface sound source. This method is suitable for complex shapes with uniform sound intensity distribution. Surface sound source sound divergence calculation, but when the sound radiation power of each part of the surface sound source has a large difference in calculation, there will be a large simulation error, and the sound source processing and sound divergence calculation of this method are complicated

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