A Numerical Simulation Analysis Method of Loudspeaker Multi-field Coupling

An analysis method and numerical simulation technology, applied in the loudspeaker field, can solve problems such as the inability to comprehensively and accurately evaluate the simulation design results of the loudspeaker, and achieve the effect of accurate simulation analysis results

Active Publication Date: 2018-04-17
ZHEJIANG ELECTRO ACOUSTIC R&D CENT CAS +1
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Problems solved by technology

[0006] The main problem to be solved by the present invention is: the existing numerical simulation analysis method cannot comprehensively and accurately evaluate the simulation design results of the loudspeaker

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  • A Numerical Simulation Analysis Method of Loudspeaker Multi-field Coupling
  • A Numerical Simulation Analysis Method of Loudspeaker Multi-field Coupling
  • A Numerical Simulation Analysis Method of Loudspeaker Multi-field Coupling

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Embodiment Construction

[0074] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0075] The present invention uses a 6.5-inch car speaker ( figure 1 ) as an example, the method and process of multi-field coupling numerical simulation analysis are explained through the numerical simulation analysis software COMSOL. figure 2 It is a flowchart of the implementation method of the present invention, and the concrete steps are as follows:

[0076] (1) Prepare. Open the COMSOL software and enter the software interface.

[0077] (2) Establish finite element model. The details are as follows:

[0078] 1) Determine the spatial dimension. Since the loudspeaker described in this example is axisymmetric, it can be analyzed in 2D space.

[0079] 2) Add physics. In the COMSOL software, click the "magnetic field", "acoustic-solid coupling" physics field, and "solid heat transfer" physical field in turn. Among them, the "magnetic fi...

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Abstract

The invention proposes a numerical simulation analysis method for loudspeaker multi-field coupling. The method requires: 1. Establish a finite element model, specifically: (1) Establish a physical model, that is, add corresponding physical fields and add solution steps according to the different structures of the loudspeaker and the physical principles involved in different working stages; (2) Establish a geometric model; (3) define material properties, modify the physical field and define boundary conditions and loads, etc., (4) mesh the model. In the process of establishing the finite element model, define 1) material properties that change with temperature; 2) special boundary conditions and load methods, so as to couple different physical fields; 2, solution and post-processing. Use the finite element method to solve the model established above, and post-process the results to finally obtain the speaker characteristic parameters under the interaction between different physical fields, including: (1) Bl(x), Z(f) and other speakers (2) Structural mechanical properties of the loudspeaker vibration system such as f0 and K(x); (3) Acoustic characteristics of the loudspeaker such as SPL and directivity curve; (4) Temperature field characteristics of the loudspeaker, etc.

Description

technical field [0001] The invention belongs to the field of loudspeakers, and relates to a numerical simulation analysis method for multi-field coupling of loudspeakers, in particular to a loudspeaker magnetic field, [0002] Numerical simulation analysis method of structural mechanics, sound field and temperature field coupling. By using this method to analyze the loudspeaker, the characteristic parameters of the loudspeaker under the influence of different physical fields can be obtained in an all-round way, including: 1. Electromagnetic characteristics of the loudspeaker such as Bl(x), Z(f); 2. f 0 , K(x) and other structural mechanical characteristics of the loudspeaker vibration system; 3. SPL, directivity curve and other acoustic characteristics of the loudspeaker; 4. Temperature field characteristics of the loudspeaker, etc. This method can make the simulation analysis results of the loudspeaker more comprehensive and accurate, and is widely used in the design of dyn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 温周斌陆晓滕越徐楚林
Owner ZHEJIANG ELECTRO ACOUSTIC R&D CENT CAS
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