CN109783830A - A kind of motor vehicle damping fin optimization placement method - Google Patents
A kind of motor vehicle damping fin optimization placement method Download PDFInfo
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- CN109783830A CN109783830A CN201711128617.1A CN201711128617A CN109783830A CN 109783830 A CN109783830 A CN 109783830A CN 201711128617 A CN201711128617 A CN 201711128617A CN 109783830 A CN109783830 A CN 109783830A
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- sound pressure
- damping fin
- pressure level
- damping
- motor vehicle
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- 238000013016 damping Methods 0.000 title claims abstract description 65
- 238000005457 optimization Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000004044 response Effects 0.000 claims description 11
- 230000005284 excitation Effects 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000012804 iterative process Methods 0.000 abstract description 2
- 238000004088 simulation Methods 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 208000009205 Tinnitus Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000013433 optimization analysis Methods 0.000 description 1
- 238000012913 prioritisation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
A kind of motor vehicle damping fin optimization placement method is related to motor vehicle body metal plate part technical field.The motor vehicle damping fin optimization placement method can carry out different laying optimizations according to different automobile types, and realize that damping ratio maximizes and is laid with most effectiveization, allow the solution of problem more have specific aim with it is professional.Utilizing works software Virtual.lab and Optistruct&Hypermesh carries out combined simulation and optimization, gives complicated Optimized Iterative process to computer disposal, improves working efficiency, avoid the waste of manpower and material resources.
Description
Technical field
The present invention relates to motor vehicle body metal plate part technical fields, in particular to a kind of motor vehicle damping fin preferred arrangement side
Method.
Background technique
Internal car noise is an important factor for influencing occupant comfort.Motor vehicle in the process of moving, will receive from road
The excitation in face is conducted by chassis installation point into vehicle body, and driver's cabin generation is made to thunder, and influences the comfortable by bus of driver and member
Property.In order to reduce internal car noise, engineer arranges damping fin on vehicle body metal plate part.
Damping fin is the important means for reducing interior low-frequency noise, but how correct effective be laid with is current research
Emphasis.
Tradition be laid with damping fin method mostly be rule of thumb to reference to related vehicle arrangement, or directly succession
Same arrangement is laid with.This stereotyped laying method is single, can not match the vehicle of different structure well
Type has both caused the waste of material resources so the effect after being laid with is often not satisfactory, and reduces efficiency and expection is also not achieved
Effect.
Current test method is come by carrying out repetition test (put up damping fin, then tear damping fin) to damping fin
The method for summarizing a set of laying.This operating quantity for Test Engineer is bigger than normal, needs validation test repeatedly so anti-
It is multiple, and demand handles a large amount of data, and this repetitive operation brings huge inconvenience to Test Engineer, while
Increase the project development period.
Summary of the invention
In view of the deficienciess of the prior art, the object of the present invention is to provide a kind of motor vehicle damping fin preferred arrangement sides
Method.
The technical scheme adopted by the invention is that: a kind of motor vehicle damping fin optimization placement method, which is characterized in that including
Following steps:
The step of obtaining initial sound pressure curve, first to the practical excitation acoustic response point of vehicle body progress for not arranging damping fin
Analysis, obtains initial sound pressure curve, and find troublesome frequencies point；
The step of finding troublesome frequencies point, first setting are receptive as human ear institute using the acoustic pressure within 35DB~55DB
Initial sound pressure curve is compared by pleasant sound pressure level using the sound pressure level as target value with target value, is more than target
Frequency values corresponding to the sound pressure level peak value of value are as troublesome frequencies point；
The sound pressure curve step for being paved with damping fin is obtained, the Vibration Condition of troublesome frequencies point under body fabrication is looked first at,
Again in the floor upper berth full damping piece of vehicle, practical excitation acoustic response analysis then is carried out to the vehicle body for being paved with damping fin, is obtained
To the sound pressure curve for being paved with damping fin；
The step of selection, if after being paved with, can make the sound pressure level of actual measurement maintain sound pressure level target value it
It is interior, and compared with initial sound pressure curve, sound pressure level decreased significantly, it is determined that be laid with scheme；Otherwise, the laying pair of damping fin
There is no materially affect in the sound pressure level of this vehicle；
The step of determining laying scheme, using damping fin volume as design variable, sound pressure level target value is obtained as constraint condition
Obtain laying scheme when damping fin is small in size and damping ratio is big.
The beneficial effects of the present invention are: the motor vehicle damping fin optimization placement method, can carry out not according to different automobile types
With laying optimization, and realize damping ratio maximize be laid with most effectiveization, allow the solution of problem more have specific aim and specially
Industry.Utilizing works software Virtual.lab and Optistruct&Hypermesh carries out combined simulation and optimization, by the excellent of complexity
Change iterative process and give computer disposal, improves working efficiency, avoid the waste of manpower and material resources.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Other attached drawings.
Fig. 1 is noise response curve synoptic diagram at human ear in the embodiment of the present invention；
Fig. 2 is that damping fin spreads noise response curve graph at the human ear of arrangement entirely in the embodiment of the present invention；
Fig. 3 is that noise response curve graph at the human ear of damping fin prioritization scheme is had in the embodiment of the present invention；
Fig. 4 is that damping fin arranges flow chart in the embodiment of the present invention.
Specific embodiment
Keep the above objects, features and advantages of the present invention more obvious and easy to understand, with reference to the accompanying drawing 1~Fig. 4 and tool
The present invention is described in further detail for body embodiment.
Motor vehicle in the process of moving, will receive many different excitations, act on vehicle body, so that vehicle body metal plate part shakes
Dynamic, the exciting car operatic tunes, generates noise and acts on human ear therewith.In order to inhibit the vibration of metal plate part, noise is reduced, is needed in metal plate
Damping fin is pasted on part to realize inhibition vibration and reduce noise.
The motor vehicle damping fin optimization placement method used in the embodiment of the present invention, comprising the following steps:
The step of obtaining initial sound pressure curve, first to the practical excitation acoustic response point of vehicle body progress for not arranging damping fin
Analysis, obtains initial sound pressure curve, and find troublesome frequencies point；
The step of finding troublesome frequencies point, first setting are receptive as human ear institute using the acoustic pressure within 35DB~55DB
Initial sound pressure curve is compared by pleasant sound pressure level using the sound pressure level as target value with target value, is more than target
Frequency values corresponding to the sound pressure level peak value of value are as troublesome frequencies point；
It is loaded into TrimmedBody model in the present embodiment according to practical road spectrum incentive and calculates human ear noise response song
Line, wherein the sound pressure level at 119Hz, 124Hz has been more than the target value of sound pressure level, so that occupant feels under the weather, influences to drive
Comfort, as shown in Figure 1.
The sound pressure curve step for being paved with damping fin is obtained, the Vibration Condition of troublesome frequencies point under body fabrication is looked first at,
Again in the floor upper berth full damping piece of vehicle, practical excitation acoustic response analysis then is carried out to the vehicle body for being paved with damping fin, is obtained
To the sound pressure curve for being paved with damping fin；
Damping fin is loaded into according to practical road spectrum incentive to spread entirely in the TrimmedBody model of scheme, is calculated human ear and is made an uproar
Acoustic response curve (dotted line is the sound pressure curve that damping fin scheme is spread entirely).It was found that the peak value of the problem of at 119Hz, 124Hz has dropped
Down to below score, it was demonstrated that damping fin laying plays Noise Reduction, but exists and be laid with asking for area excessive (increasing cost)
Next topic needs the laying to damping fin to carry out opening up benefit optimization analysis, reaches optimization with most reasonable laying scheme to reach
Effect.
The step of determining laying scheme, using damping fin volume as design variable, sound pressure level target value is obtained as constraint condition
Obtain laying scheme when damping fin is small in size and damping ratio is big.
Damping loss factor is the damping characteristic of measurement system, and which determine system vibration dissipation of energy ability, dampings
Piece depends on the influence of acoustic pressure the sensitivity of damping fin, during Optimized Iterative, gradually deletes sensitivity absolute value
The smallest unit, so the mathematical model of the damping loss factor of damping-constraining piece are as follows:
Find α=(α1......αN)T
maxηk
s.t.αi=(0,1)
In formula, N is the element number of damping fin, αiFor the existence of i-th damping blade unit, 0 is deletes, and 1 is guarantor
It stays, W is that damping fin is laid with maximum area, miFor element quality, ηkFor the damping loss factor of kth rank.In the mistake of damping fin optimization
Cheng Zhong, cell density is that 0 (or close to 0) is gradually deleted after Optimization Solution, and remaining damping fin material will rearrange, and reach
It is maximized to damping ratio.
Damping fin is carried out opening up benefit optimization being using the cell density of damping fin as design variable, with damping fin fissipation factor
Sensitivity is similar, and characteristic is all and structure is related with material parameter, the continuous value between 0~1, the unit after Optimization Solution
Density then proves that the unit is critically important and needs to be retained close to 1；For unit intensity after Optimization Solution close to 0, then proving should
Unit can be deleted.To sound pressure curve set target value, it is specified that peak-peak cannot be more than target value, after opening up benefit optimization
Sound pressure curve is as shown in Figure 3.
Sound pressure curve after Optimized Iterative 30 times, it can be seen that the peak value at 119Hz, 124Hz is controlled below mesh
Scale value.And integrated curved is still lower than primitive curve, reaches effect of optimization.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (1)
1. a kind of motor vehicle damping fin optimization placement method, which comprises the following steps:
The step of obtaining initial sound pressure curve, first the practical excitation acoustic response analysis of vehicle body progress to damping fin is not arranged, obtains
To initial sound pressure curve, and find troublesome frequencies point；
The step of finding troublesome frequencies point, first setting are using the acoustic pressure within 35DB~55DB as the receptive comparison of human ear institute
Initial sound pressure curve is compared, more than target value by comfortable sound pressure level using the sound pressure level as target value with target value
Frequency values corresponding to sound pressure level peak value are as troublesome frequencies point；
It obtains and is paved with the sound pressure curve step of damping fin, look first at the Vibration Condition of troublesome frequencies point under body fabrication, then
Then the floor upper berth full damping piece of vehicle carries out practical excitation acoustic response analysis to the vehicle body for being paved with damping fin, is spread
The sound pressure curve of full damping piece；
The step of selection, if after being paved with, the sound pressure level of actual measurement can be made to maintain within the target value of sound pressure level, and
And compared with initial sound pressure curve, sound pressure level decreased significantly, it is determined that be laid with scheme；Otherwise, the laying of damping fin is for this
The sound pressure level of vehicle does not have materially affect；
The step of determining laying scheme, using damping fin volume as design variable, sound pressure level target value obtains most as constraint condition
Good laying scheme.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711128617.1A CN109783830A (en) | 2017-11-15 | 2017-11-15 | A kind of motor vehicle damping fin optimization placement method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711128617.1A CN109783830A (en) | 2017-11-15 | 2017-11-15 | A kind of motor vehicle damping fin optimization placement method |
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| CN109783830A true CN109783830A (en) | 2019-05-21 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1524613A1 (en) * | 2003-10-15 | 2005-04-20 | Rieter Technologies A.G. | Optimising method for vibration damping |
| CN104200047A (en) * | 2014-09-18 | 2014-12-10 | 重庆大学 | Constrained damping drum optimization design method for optimally minimizing square of resonance peak values |
| CN104200048A (en) * | 2014-09-18 | 2014-12-10 | 重庆大学 | Constrained damping plate optimization design method based on bidirectional evolutionary optimization algorithm |
| CN104786957A (en) * | 2015-04-29 | 2015-07-22 | 上汽通用五菱汽车股份有限公司 | Structure optimization design method for automobile damping board |
| CN106202653A (en) * | 2016-06-28 | 2016-12-07 | 广州汽车集团股份有限公司 | A kind of vehicle body damping distribution optimization method and system |
-
2017
- 2017-11-15 CN CN201711128617.1A patent/CN109783830A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1524613A1 (en) * | 2003-10-15 | 2005-04-20 | Rieter Technologies A.G. | Optimising method for vibration damping |
| CN104200047A (en) * | 2014-09-18 | 2014-12-10 | 重庆大学 | Constrained damping drum optimization design method for optimally minimizing square of resonance peak values |
| CN104200048A (en) * | 2014-09-18 | 2014-12-10 | 重庆大学 | Constrained damping plate optimization design method based on bidirectional evolutionary optimization algorithm |
| CN104786957A (en) * | 2015-04-29 | 2015-07-22 | 上汽通用五菱汽车股份有限公司 | Structure optimization design method for automobile damping board |
| CN106202653A (en) * | 2016-06-28 | 2016-12-07 | 广州汽车集团股份有限公司 | A kind of vehicle body damping distribution optimization method and system |
Non-Patent Citations (3)
| Title |
|---|
| 赵建轩等: ""车身阻尼材料的布置优化方法"", 《上海交通大学学报》, vol. 51, no. 09, 30 September 2017 (2017-09-30) * |
| 郑玲等: ""车身结构阻尼材料减振降噪优化设计"", 《振动与冲击》, vol. 34, no. 09, 15 May 2015 (2015-05-15) * |
| 陶结: ""粘弹性阻尼减振结构渐进法拓扑动力学优化研究"", 中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》, no. 2, 15 February 2017 (2017-02-15) * |
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Application publication date: 20190521 |