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Coupling modeling method, apparatus, device and medium of acoustic pressure

A modeling method and coupling equation technology, applied in the field of device, sound pressure coupling modeling method, equipment and medium, can solve problems such as difficulty in guaranteeing overall efficiency, calculation speed and calculation efficiency impact, etc. The effect of high precision and high convergence

Active Publication Date: 2018-12-07
SUZHOU UNIV
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Problems solved by technology

Although the finite element method is versatile, the calculation speed and efficiency are greatly affected by the number of analysis units. Since the current sound field model is often large, and the analysis results of the transfer characteristics between coupled sound fields have high accuracy requirements, A large number of analysis units are required to participate in the calculation of the finite element, so it is difficult to ensure the overall efficiency when analyzing the coupling sound field characteristics between acoustic cavities

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  • Coupling modeling method, apparatus, device and medium of acoustic pressure
  • Coupling modeling method, apparatus, device and medium of acoustic pressure
  • Coupling modeling method, apparatus, device and medium of acoustic pressure

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Embodiment 1

[0047] figure 1 It is a flowchart of a sound pressure coupling modeling method provided by an embodiment of the present invention. Please refer to figure 1 , the specific steps of the acoustic pressure coupling modeling method include:

[0048] Step S10: Obtain the sound pressure to be coupled between the two acoustic cavities.

[0049] It should be noted that the two acoustic cavities in this step, that is, the first acoustic cavity and the second acoustic cavity, respectively represent two acoustic cavities that can independently generate sound sources. produce sound pressure. Since it is relatively difficult to obtain the sound pressure, and a series of characteristics of the sound field can be reflected through the sound pressure, this method couples the sound pressure between different sound cavities to obtain the sound field characteristics between the sound cavities.

[0050] Step S11: Respectively express the two sound pressures as the first Fourier series in three...

Embodiment 2

[0061] On the basis of the above embodiments, the present invention also provides the following series of preferred implementation manners.

[0062] As a preferred embodiment, the coupling equation between the first Fourier series and the second Fourier series is established as follows:

[0063] According to Hamilton's principle, the coupling equation between the first Fourier series and the second Fourier series is established in the form of Lagrangian functional.

[0064] It should be noted that, considering that the Lagrangian functional is used to establish the coupling equation to achieve a simple and easy overall effect, in this embodiment, the Lagrange functional is used to establish the first Fourier series and The coupling equation between the second Fourier series relatively improves the overall coupling efficiency.

[0065] In specific cases, the first coupling equation of the Lagrangian functional of the acoustic pressure in the acoustic cavity and the thin plate ...

Embodiment 3

[0096] The following provides an example in an actual scenario, please refer to figure 2 A schematic diagram of the space of the acoustic cavity and thin plate model shown.

[0097] In this embodiment, the thickness of the thin plate model h=1×10 -7 m, cavity 1: a 1 ×b 1 ×c 1 =2×2.2×2.4m and acoustic chamber 2: a 2 ×b 2 ×c 2 =2.2×2.4×2.6m, in which the acoustic cavity 1 and 2 adopt their respective sub-coordinate systems, namely o 1 -x 1 -y 1 -z 1 and o 2 -x 2 -y 2 -z 2 , o 2 -x 2 -y 2 -z 2 The origin of the coordinate system is at o 1 -x 1 -y 1 -z 1 The coordinates in the coordinate system are (0.2, 0.2, 0)m, and this parameter determines the spatial positions of the two acoustic cavities. The size (length and width) of the coupling point (thin plate model plate) is 1×1.2m, and the coordinates of the center point of the coupling point in acoustic cavity 1 and acoustic cavity 2 are (1, 1.1, 0) m and (0.8, 0.9, 0) respectively m. The material parameters...

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Abstract

The invention discloses a coupling modeling method, apparatus, device and a medium of sound pressure. The method comprises the following steps: acquiring sound pressure to be coupled between two soundcavities; expressing the two sound pressures as a first Fourier series in three dimensions; arranging a thin plate model at the coupling part of the sound pressure, and expressing the vibration function of the thin plate model as a second Fourier series in two dimensions; establishing a coupling equation between the first Fourier series and the second Fourier series; transforming the coupling equations into coupling matrices, and coupling the coupling matrices to construct the coupled acoustic cavity system model. This method improves the overall efficiency of analyzing the characteristics ofthe coupled acoustic field between the acoustic cavities. In addition, the invention also provides an acoustic pressure coupling modeling apparatus and device and a medium, the beneficial effects ofwhich are as described above.

Description

technical field [0001] The invention relates to the field of sound field analysis, in particular to a sound pressure coupling modeling method, device, equipment and medium. Background technique [0002] At present, in the fields of engineering and science, predicting and solving the transfer characteristics between coupled sound fields is an important work content. [0003] Due to the complexity of the sound field itself, for acoustic prediction of the coupled sound field between the acoustic cavities, there is currently no modeling method based on the analytical method for coupling the sound pressure in the acoustic cavity. At present, it is only possible to analyze the sound field analysis units under a large number of unit areas in the acoustic cavity according to the finite element theory, and obtain corresponding analysis results, and then combine the analysis results to obtain the overall transfer characteristics of the sound field. Although the finite element method ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20Y02T90/00
Inventor 王刚李文龙李玩幽冯志华倪俊芳陆佳伟
Owner SUZHOU UNIV
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