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A Loudspeaker Co-simulation Method Based on Finite Element Method

A technology of co-simulation and finite element method, applied in design optimization/simulation, instrument, calculation, etc., can solve problems such as the gap of electro-acoustic propagation state, and achieve the effect of reliable assistance and reference

Inactive Publication Date: 2021-09-03
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its input response is generally a set electromagnetic wave sine or cosine harmonic signal, which is more modular and has a gap with the actual electroacoustic propagation state

Method used

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  • A Loudspeaker Co-simulation Method Based on Finite Element Method
  • A Loudspeaker Co-simulation Method Based on Finite Element Method
  • A Loudspeaker Co-simulation Method Based on Finite Element Method

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Embodiment Construction

[0030] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] In order to get closer to the loudspeaker response situation in practical applications, this embodiment proposes to use Orcad Capture and Pspice A / D in EDA software cadence to carry out circuit design and simulation experiments, and design a power amplifier circuit to generate AC sine waves as input COMSOL Excitation signal in a loudspeaker model. Since the sine wave signal generated by Pspice in Cadence cannot be directly imported into COMSOL, the present invention then uses MATLAB to sample the sine wave signal and then input it to COMSOL, and finally carry out the simulation experiments of acoustics, solid mechanics and electromagnetism of the loudspeaker.

[0032] This embodiment is realized through the following technical solutions, a loudspeaker co-simulation method based on the finite element method, comprising the following steps::

[0...

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Abstract

The present invention relates to loudspeaker simulation design technology, in particular to a loudspeaker co-simulation method based on the finite element method, selecting a class D power amplifier with appropriate parameters, using OrCAD Capture to build its circuit model, and drawing a schematic diagram of the power amplifier circuit; in Cadence Set parameters in Pspice A / D, analyze time-domain parameters, and check simulation results; convert the simulation results obtained in Cadence into Matlab to obtain sampling signals that can be input into Comsol; finally establish in Comsol Loudspeaker model, input sampling signal, observe and detect various parameters of the coil in the process of sound transmission and the output magnetic force generated in the permanent magnet of the driver and the adjacent magnetic domain. This method highly simulates the actual loudspeaker application situation, can effectively detect the vibration of the loudspeaker coil and various parameters according to different excitation signals, and has high guiding and reference value for industrial loudspeaker performance testing.

Description

technical field [0001] The invention belongs to the technical field of loudspeaker simulation design, in particular to a loudspeaker co-simulation method based on the finite element method. Background technique [0002] In the past two years, with the sudden emergence of audio equipment in human-computer interaction, people's demand and requirements for audio equipment have also become higher and higher. This requires continuous development of the design and manufacture of audio equipment to meet people's needs. The design and development of audio equipment cannot do without the help of multiphysics simulation. First of all, simulation is to reproduce the essential process in the actual system through modeling. Due to the limitation of computer hardware and software and numerical calculation theory, early simulation analysis mainly focused on a single physical field in a professional field, such as electric field, magnetic field, thermal energy, etc. But things are univer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/367G06F30/23
CPCG06F30/36G06F30/367G06F30/23
Inventor 许贤泽方屹涛徐逢秋
Owner WUHAN UNIV