Numerical value simulation method of vibration and acoustic characteristics of speaker

A technology of acoustic characteristics and numerical simulation, applied in the field of loudspeakers, can solve the problems of analyzing the characteristics of loudspeakers, high-cost equivalent circuits, and long development cycles

Active Publication Date: 2011-04-06
ZHEJIANG ELECTRO ACOUSTIC R&D CENT CAS +1
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  • Abstract
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Problems solved by technology

[0005] What the present invention aims to solve is the problem that the loudspeaker problem cannot be found until the later stage of design in the empirical method, and the development cycle is l

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  • Numerical value simulation method of vibration and acoustic characteristics of speaker
  • Numerical value simulation method of vibration and acoustic characteristics of speaker
  • Numerical value simulation method of vibration and acoustic characteristics of speaker

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Embodiment Construction

[0062] The present invention will be further described below with reference to the drawings and embodiments.

[0063] The present invention takes a 6.5-inch car speaker as an example to simulate and analyze its vibration and acoustic characteristics. Such as figure 1 As shown, the steps of the present invention are as follows:

[0064] Step 1: Use the 3D drawing software Pro / E to create a 3D geometric model of the speaker.

[0065] figure 2 Is the 3D geometric model of the speaker 1, image 3 It is a schematic cross-sectional view of the speaker 1. It can be seen from the figure that the speaker 1 is composed of three parts: (1) The magnetic circuit system, including the T iron 11, the magnet 10, and the upper splint 9, mainly generates a magnetic field, which will generate a energized voice coil. Driving force; (2) Vibration system, including paper cone 6, dust cap 2, folding ring 3, positioning support (bomb) 7, skeleton 8 and voice coil 8-1, which vibrate and radiate sound unde...

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Abstract

The invention provides a numerical value simulation method of the vibration and acoustic characteristics of a speaker. The method comprises the following steps of: firstly, drawing a 3D (Three-Dimensional) geometric model diagram of the speaker by using 3D drawing software; then, adding the 3D geometric model diagram of the speaker to meshing software to mesh the 3D geometric model diagram into body elements, defining element types, materials and boundary conditions and applying a load to acquire a finite element model; establishing a boundary element model matched with the finite element model; and finally, solving the finite element model with a finite element solver to acquire the vibration characteristics of the speaker, and solving the boundary element model with a boundary element solver to acquire the acoustic characteristics of the speaker, wherein the vibration characteristics include the natural frequency, the vibration mode (vibration type), the displacement, the strain and the stress, and the acoustic characteristics include a frequency response curve and a directivity curve.

Description

Technical field [0001] The invention belongs to the field of loudspeakers, and relates to a method for simulating the vibration and acoustic characteristics of the loudspeaker, in particular to a numerical simulation method for the vibration and acoustic characteristics of the loudspeaker. Using this method to analyze the vibration and acoustic characteristics of the speaker, the natural frequency, vibration mode (mode), displacement, strain, stress, frequency response curve, and directivity curve of the speaker can be obtained. Can be widely used in the design and development of speakers. Background technique [0002] There are two traditional loudspeaker analysis and design methods: (1) Empirical method. Generally, it is a repeated cyclic process of sample trial-making, testing, improving the sample, and re-testing. This method must wait until the later stage of the design to discover the speaker problem, and the development cycle is long and the cost is high; (2) Equivalent c...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 温周斌李军金向锋徐楚林
Owner ZHEJIANG ELECTRO ACOUSTIC R&D CENT CAS
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