CN105138746B - Pass through the anti-method for pushing away its Young's modulus of the stiffness factor of loudspeaker vibration component - Google Patents
Pass through the anti-method for pushing away its Young's modulus of the stiffness factor of loudspeaker vibration component Download PDFInfo
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Abstract
The invention discloses a kind of anti-method for pushing away its Young's modulus of stiffness factor by loudspeaker vibration component, belong to loudspeaker design and manufacture and material property extracting field.First, the stiffness factor K of loudspeaker vibration component is obtained using measuring method1.Then, the stiffness factor K of the vibrating mass is obtained using simulating analysis2, it include establish geometrical model, establish simulation analysis model and static analysis solve and etc..Finally, above-mentioned stiffness factor K is passed through1And K2, Extrapolation obtains the Young's modulus of the vibrating mass material.This method can relatively accurately obtain the material property of loudspeaker vibration component, so as to preferably design and make loudspeaker.
Description
Technical field
The invention belongs to loudspeaker design and manufacture and material property extracting field, refers to one kind and is shaken by loudspeaker
The anti-method for pushing away its Young's modulus of the stiffness factor of dynamic component.
Background technology
The vibrating mass of loudspeaker includes centring disk, cone, dust cap, skeleton and voice coil loudspeaker voice coil etc., and most of components all belong to
It is hot-forming after the glue matrix such as phenolic resin by the way that fibrous braid is immersed in composite material, such as centring disk
Form, be a kind of typical composite material, its material property is complex, it is difficult to measure, and fabric dividing in process, match somebody with somebody
The technique such as glue and hot pressing can all have an important influence on the Young's modulus of each component finished product.But in the course of work of vibrating mass
In, what is showed is more the characteristic of linear elastic materials, by vibrating mass as linear elastic materials processing, can greatly simplify and shake
Dynamic component material model establishes process, is conducive to engineer and more easily goes to understand and design vibrating mass.
The characteristic of linear elastic materials includes Young's modulus, Poisson's ratio and density etc., and wherein Young's modulus is linear elastic materials
Main material parameter, be now subjected to technological process and the limitation of measuring method, can not accurately measure the poplar of vibrating mass material
Family name's modulus, can only use as far as possible identical technological process that the raw material of vibrating mass are pressed into smooth fabric, then measure fabric
Young's modulus, and its approximation is used as to the Young's modulus of vibrating mass material, it turns out that, the error of this approximate generation compared with
Greatly.Pursued with to the continuous of loudspeaker quality, it is desirable to a kind of accurate measurement vibrating mass young modulus of material can be obtained
Method.
The content of the invention
The purpose of the present invention is obtain a kind of anti-side for pushing away its Young's modulus of stiffness factor by loudspeaker vibration component
Method；
The present invention is to solve the problem of can not accurately measuring loudspeaker vibration component materials Young's modulus.The present invention is logical
The measurement result and simulation result of loudspeaker vibration component stiffness factor are crossed, Extrapolation goes out the Young mould of vibrating mass material
Amount；
A kind of anti-method for pushing away its Young's modulus of stiffness factor by loudspeaker vibration component of the present invention, specific steps
For：
（1）Measurement obtains the stiffness factor of vibrating mass；
There is the stiffness factor that two ways measurement obtains vibrating mass：1）Pass through the change indicated on vibrating mass design drawing
Position a mm/M g, calculate the stiffness factor of vibrating mass：K1=M×9.8×10-3 /a（N/mm）, M expression quality sizes, a expressions
Displacement, N represent the unit of power； 2）Using the pliable measuring instrument of loudspeaker vibration component, measurement obtains certain point on vibrating mass
P is in different distortion displacementx 1Under stiffness factor K1（x 1）；
If wish to obtain the measurement accuracy of higher, employing mode 2）The stiffness factor of the method measurement vibrating mass；
（2）Simulation analysis obtain the stiffness factor of vibrating mass；
A. geometrical model is established；
There is the geometrical model that two ways establishes vibrating mass：1）By the design drawing of vibrating mass, its geometry is obtained
Model；2）Using 3D geometric profiles scanner or coordinatograph equipment, the geometrical model of vibrating mass is measured, and in Survey Software
It is converted into the cad file of STL forms；
If wish to obtain the geometric accuracy of higher, it is proposed that employing mode 2）The geometry mould of the method measurement vibrating mass
Type；
B. simulation analysis model is established；
1）Import geometrical model：The geometrical model of vibrating mass is imported in numerical computations software；
2）Definition material parameter：Define Poisson's ratio, density and the Young's modulus estimate E of vibrating mass material0；
3）Physical field environment is set：Select Solid Mechanics analytical model；
4）Grid division：The geometrical model of vibrating mass is divided into some grid cells, if 2D models, selects face
Unit, if 3D models, then select body unit；
5）Define boundary condition：Fixed boundary condition, reference measure displacement or during stiffness factor fixture position, shaking
The corresponding site of dynamic component geometrical model defines fixed boundary condition；Load boundary condition, when employing mode 1）Measurement is shaken
During the stiffness factor of dynamic component, reference measure conjugate when point of force application, vibrating mass corresponding site apply size for F=
M×9.8×10-3N, direction is the load on vibrating mass operative orientation, when employing mode 2）Measurement obtains the strength of vibrating mass
When spending coefficient, point of force application during reference measure stiffness factor, it be 0.49 N to apply size in the corresponding site of vibrating mass, just
Load on for vibrating mass operative orientation；
C. static analysis solves；
1）In numerical computations software, static analysis solver is selected, solution obtains corresponding on vibrating mass at P points
Displacementx 2；
2）The stiffness factor simulation result that vibrating mass is calculated according to following equation is：
K2=F/x 2
（3）The anti-Young's modulus for pushing away vibrating mass material；
In the measurement result K of vibrating mass stiffness factor1（x 1）In, extractionx 1=x 2The value K at place1, it is known that vibrating mass stiffness
The measurement result K of coefficient1, simulation result K2With Young's modulus estimate E0, according to the Young's modulus of linear elastic materials and stiffness system
The directly proportional principle of number, the Young's modulus E of Extrapolation vibrating mass material；
E=E0×K1/K2
Numerical computations software includes alling the business software based on finite element or boundary element theory, including COMSOL, ANSYS
And ABAQUS.Loudspeaker vibration component includes dust cap, cone, centring disk, skeleton and voice coil loudspeaker voice coil.
It is an advantage of the invention that：The method of the present invention is tied by the measurement result and emulation of loudspeaker vibration component stiffness factor
Fruit, the anti-Young's modulus for releasing vibrating mass material.This method can accurately measure the Young's modulus of vibrating mass material, help
Electroacoustic engineering teacher relatively accurately obtains the material property of loudspeaker vibration component, so as to preferably design and make loudspeaker.
Brief description of the drawings
Fig. 1 is implementation flow chart of the present invention.
Fig. 2 is the 2D axial symmetry geometrical models of centring disk.
Fig. 3 is fixed boundary.
Fig. 4 is the mesh generation result of the centring disk.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
A kind of as shown in Figure 1, anti-side for pushing away its Young's modulus of stiffness factor by loudspeaker vibration component of the present invention
Method, concretely comprises the following steps：
（1）Measurement obtains the stiffness factor of vibrating mass；
There is the stiffness factor that two ways measurement obtains vibrating mass：1）Pass through the change indicated on vibrating mass design drawing
Position a mm/M g, calculate the stiffness factor of vibrating mass：K1=M×9.8×10-3 /a（N/mm）, M expression quality sizes, a expressions
Displacement, N represent the unit of power； 2）Using the pliable measuring instrument of loudspeaker vibration component, measurement obtains certain point on vibrating mass
P is in different distortion displacementx 1Under stiffness factor K1（x 1）；
If wish to obtain the measurement accuracy of higher, employing mode 2）The stiffness factor of the method measurement vibrating mass；
（2）Simulation analysis obtain the stiffness factor of vibrating mass；
A. geometrical model is established；
There is the geometrical model that two ways establishes vibrating mass：1）By the design drawing of vibrating mass, its geometry is obtained
Model；2）Using 3D geometric profiles scanner or coordinatograph equipment, the geometrical model of vibrating mass is measured, and in Survey Software
It is converted into the cad file of STL forms；
If wish to obtain the geometric accuracy of higher, it is proposed that employing mode 2）The geometry mould of the method measurement vibrating mass
Type；
B. simulation analysis model is established；
1）Import geometrical model：The geometrical model of vibrating mass is imported in numerical computations software；
2）Definition material parameter：Define Poisson's ratio, density and the Young's modulus estimate E of vibrating mass material0；
3）Physical field environment is set：Select Solid Mechanics analytical model；
4）Grid division：The geometrical model of vibrating mass is divided into some grid cells, if 2D models, selects face
Unit, if 3D models, then select body unit；
5）Define boundary condition：Fixed boundary condition, reference measure displacement or during stiffness factor fixture position, shaking
The corresponding site of dynamic component geometrical model defines fixed boundary condition；Load boundary condition, is shaken when using the first measurement
During the stiffness factor mode of dynamic component, point of force application when reference measure conjugates, applies size in the corresponding site of vibrating mass
For F=M × 9.8 × 10-3N, direction are the load on vibrating mass operative orientation, and vibrating mass is obtained when using second of measurement
Stiffness factor mode when, point of force application during reference measure stiffness factor, applying size in the corresponding site of vibrating mass is
0.49 N, direction are the load on vibrating mass operative orientation；
C. static analysis solves；
1）In numerical computations software, static analysis solver is selected, solution obtains corresponding on vibrating mass at P points
Displacementx 2；
2）The stiffness factor simulation result that vibrating mass is calculated according to following equation is：
K2=F/x 2
（3）The anti-Young's modulus for pushing away vibrating mass material；
In the measurement result K of vibrating mass stiffness factor1（x 1）In, extractionx 1=x 2The value K at place1, it is known that vibrating mass stiffness
The measurement result K of coefficient1, simulation result K2With Young's modulus estimate E0, according to the Young's modulus of linear elastic materials and stiffness system
The directly proportional principle of number, the Young's modulus E of Extrapolation vibrating mass material；
E=E0×K1/K2
Numerical computations software includes alling the business software based on finite element or boundary element theory, including COMSOL, ANSYS
And ABAQUS.Loudspeaker vibration component includes dust cap, cone, centring disk, skeleton and voice coil loudspeaker voice coil.
Now by taking the centring disk in a 6.5 inches of auto loud hailer vibrating mass as an example, COMSOL software emulations are used
Its stiffness factor, and the method for the present invention is illustrated with being contrasted by the stiffness factor of calculation of deflection.The method
Mainly have the following steps；
Step 1：It is 2.094 mm/50 g to read displacement by the design drawing of centring disk, calculates its stiffness factor K1=
0.234 N/mm；
Step 2：By the design drawing of centring disk, the 2D axial symmetry geometrical models of centring disk are drawn, see Fig. 2；
Step 3：Since centring disk is axially symmetric structure, for the ease of calculating, selected first in COMSOL softwares
2D axial symmetry analysis environments are selected, then select Solid Mechanics module, finally select static analysis pattern；
Step 4：The 2D axial symmetry geometrical models of centring disk are imported in " geometry " of COMSOL softwares；
Step 5：The finite element model of centring disk is established using COMSOL, is comprised the following steps that；
1）Definition material characteristic.The density for setting centring disk is 450 kg/m3, Poisson's ratio 0.33, Young's modulus is estimated
Evaluation is 400 MPa；
2）Define boundary condition.Since when measuring centring disk displacement, its outer edge is fixed by fixture, so
The geometrical model outer edge of centring disk defines fixed boundary condition, as shown in thick lines in Fig. 3.Apply size in inward flange
For -0.49 N, direction is the power of z；
3）Mesh generation.Setting trellis-type is free triangular unit, and unit size is set to Extra fine, is clicked on
Build all, the result is shown in Fig. 4；
Step 6：Click on Study and proceed by static analysis solution；
Step 7：After the completion of solution, the shift value at any point on centring disk inward flange is extractedx 2=-1.4mm, then feel relieved
The simulation result of branch piece stiffness factor is；
K2=F/x 2=-0.49 N/(-1.4) mm=0.35 N/mm
Step 8：It is counter to push away Young's modulus.The size of centring disk stiffness factor is directly proportional with Young's modulus, by known
Data, can go out Young's modulus E=E of centring disk material with Extrapolation0×K1/K2=400 MPa×0.234/0.35=
267.4 MPa。
Finally it should be noted that：Above case study on implementation not limits this hair only to illustrate the process of realizing of the present invention
Bright described technical solution.Therefore, although this specification is described in detail the present invention with reference to above-mentioned each step,
But it will be understood by those of ordinary skill in the art that, still it can modify to the present invention or equivalent substitution, and all are not
Depart from technical solution and its improvement of the spirit and scope of the present invention, should all cover in scope of the presently claimed invention.
Claims (3)
1. a kind of anti-method for pushing away its Young's modulus of stiffness factor by loudspeaker vibration component, it is characterised in that this method is extremely
Comprise the following steps less：
（1）Measurement obtains the stiffness factor of vibrating mass；
There is the stiffness factor that two ways measurement obtains vibrating mass：1）Pass through the displacement a indicated on vibrating mass design drawing
Mm/M g, calculate the stiffness factor of vibrating mass：K1=M×9.8×10-3 /a（N/mm）, M expression quality sizes, a expression displacements
Size, N represent the unit of power； 2）Using the pliable measuring instrument of loudspeaker vibration component, measurement is obtained on vibrating mass at certain point P
In different distortion displacementx 1Under stiffness factor K1（x 1）；
（2）Simulation analysis obtain the stiffness factor of vibrating mass；
A. geometrical model is established；
There is the geometrical model that two ways establishes vibrating mass：1）By the design drawing of vibrating mass, its geometrical model is obtained；
2）Using 3D geometric profiles scanner or coordinatograph equipment, the geometrical model of vibrating mass is measured, and is converted in Survey Software
For the cad file of STL forms；
B. simulation analysis model is established；
1）Import geometrical model：The geometrical model of vibrating mass is imported in numerical computations software；
2）Definition material parameter：Define Poisson's ratio, density and the Young's modulus estimate E of vibrating mass material0；
3）Physical field environment is set：Select Solid Mechanics analytical model；
4）Grid division：The geometrical model of vibrating mass is divided into some grid cells, if 2D models, selects face unit,
If 3D models, then select body unit；
5）Define boundary condition：Fixed boundary condition, reference measure displacement or during stiffness factor fixture position, in vibration section
The corresponding site of part geometrical model defines fixed boundary condition；Load boundary condition, when employing mode 1）Measurement obtains vibration section
During the stiffness factor of part, reference measure conjugate when point of force application, vibrating mass corresponding site apply size for F=M ×
9.8×10-3N, direction is the load on vibrating mass operative orientation, when employing mode 2）Measurement obtains the stiffness system of vibrating mass
During number, point of force application during reference measure stiffness factor, it is 0.49 N to apply size in the corresponding site of vibrating mass, and direction is
Load on vibrating mass operative orientation；
C. static analysis solves；
1）In numerical computations software, static analysis solver is selected, solution obtains corresponding to the displacement at P points on vibrating mass
x2；
2）The stiffness factor simulation result that vibrating mass is calculated according to following equation is：
K2=F/x 2
（3）The anti-Young's modulus for pushing away vibrating mass material；
In the measurement result K of vibrating mass stiffness factor1（x 1）In, extractionx 1=x 2The value K at place1, it is known that vibrating mass stiffness factor
Measurement result K1, simulation result K2With Young's modulus estimate E0, according to the Young's modulus of linear elastic materials and stiffness factor into
The principle of direct ratio, the Young's modulus E of Extrapolation vibrating mass material；
E=E0×K1/K2
2. as claimed in claim 1 by the anti-method for pushing away its Young's modulus of stiffness factor of loudspeaker vibration component, it is special
Sign is that numerical computations software includes alling the business software based on finite element or boundary element theory.
3. as claimed in claim 1 by the anti-method for pushing away its Young's modulus of stiffness factor of loudspeaker vibration component, it is special
Sign is that loudspeaker vibration component includes dust cap, cone, centring disk, skeleton and voice coil loudspeaker voice coil.
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| CN108460204B (en) * | 2018-02-26 | 2022-02-18 | 浙江中科电声研发中心 | Method for reversely deducing dynamic mechanical parameters of material of loudspeaker through stress and displacement of vibrating part of loudspeaker |
| CN108959835B (en) * | 2018-09-28 | 2023-10-13 | 苏州上声电子股份有限公司 | Intensity simulation analysis method of loudspeaker basin stand in screw installation process |
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| CN202331996U (en) * | 2011-11-04 | 2012-07-11 | 湖南工业大学 | Measuring device of spring stiffness coefficient |
| CN104408227A (en) * | 2014-10-28 | 2015-03-11 | 浙江中科电声研发中心 | Loudspeaker distortion feature value simulation analysis method |
| CN104849147A (en) * | 2015-05-26 | 2015-08-19 | 山东交通学院 | Modal natural frequency-based metal material Young modulus measurement device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6526835B1 (en) * | 2001-06-06 | 2003-03-04 | Andersen Corporation | Apparatus and method for characterizing physical properties of a test piece |
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|---|---|---|---|---|
| JPH10105546A (en) * | 1996-09-26 | 1998-04-24 | Pub Works Res Inst Ministry Of Constr | Weathering degree discriminating method for bedrock |
| CN202331996U (en) * | 2011-11-04 | 2012-07-11 | 湖南工业大学 | Measuring device of spring stiffness coefficient |
| CN104408227A (en) * | 2014-10-28 | 2015-03-11 | 浙江中科电声研发中心 | Loudspeaker distortion feature value simulation analysis method |
| CN104849147A (en) * | 2015-05-26 | 2015-08-19 | 山东交通学院 | Modal natural frequency-based metal material Young modulus measurement device and method |
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Address after: 314199 1 floor, 1 tower, science and technology center, 568 Jinyang East Road, Jiashan, Jiaxing, Zhejiang. Co-patentee after: Suzhou Sonavox electronic Limited by Share Ltd Patentee after: Zhejiang Electro-Acoustic R&D Center, CAS Address before: 314199 1 floor, 1 tower, science and technology center, 568 Jinyang East Road, Jiashan, Jiaxing, Zhejiang. Co-patentee before: Shangsheng Electronic Co., Ltd., Suzhou Patentee before: Zhejiang Electro-Acoustic R&D Center, CAS |