Numerical simulation analysis method for multi-field coupling of loudspeaker

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: 2014-12-31
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 analy

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  • Numerical simulation analysis method for multi-field coupling of loudspeaker
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  • Numerical simulation analysis method for multi-field coupling of loudspeaker

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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 provides a numerical simulation analysis method for multi-field coupling of a loudspeaker. The method includes: firstly, establishing a finite element model, to be more specific, (1) establishing a physical model, namely adding corresponding physical fields and adding a solving step according to different structures of the loudspeaker and different physical principles referred in different working stages, (2) establishing a geometric model, (3) defining material properties, modifying the physical fields and defining boundary conditions, load and the like, (4) performing meshing on the model; secondly, performing solving and post-processing, to be more specific, solving the established model via a finite element method, and subjecting results to post-processing to finally obtain loudspeaker characteristic parameters under mutual influences among the different physical fields, wherein the loudspeaker characteristic parameters include loudspeaker electromagnetic characteristics such as Bl(x) and Z(f), structural mechanical characteristics such as f0 and K(x) of a loudspeaker vibration system, loudspeaker acoustic characteristics of SPL, directivity curves and the like and temperature field characteristics and the like of the loudspeaker. In the process of establishing the finite element model, the material properties of variation with temperature and the special boundary conditions and load modes are defined to couple the different physical fields.

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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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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