CN103578460A - Vehicle damping noise reduction method - Google Patents
Vehicle damping noise reduction method Download PDFInfo
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- CN103578460A CN103578460A CN201210268392.0A CN201210268392A CN103578460A CN 103578460 A CN103578460 A CN 103578460A CN 201210268392 A CN201210268392 A CN 201210268392A CN 103578460 A CN103578460 A CN 103578460A
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Abstract
The invention discloses a vehicle damping noise reduction method. The vehicle damping noise reduction method comprises the following steps that (1) the vehicle body of a vehicle is connected with a mechanical vibration generator used for simulating the vibration of an engine of the vehicle; (2) vibration sensors are arranged on all plates of the vehicle body, and the vibration sensors record vibration signals of all the plates; (3) plates where damping needs to be added are determined at least according to the vibration signals. The method can further comprises the steps that a sound pressure meter is arranged in the passenger cabin of the vehicle, the sound pressure meter is used for recording noise signals radiated by all the plates of the vehicle, and thus the plates where the damping needs to be added is further determined based on the relation between the intensity of the noise signals and the intensity of the vibration signals. The method reduces the blindness and the randomness of adding the damping in the noise reduction process of the vehicle.
Description
Invention field
The present invention relates to vehicle noise-reduction method, relate in particular to by rationally utilizing damping vehicle to be carried out to the method for noise reduction.
Background technology
Vehicle internal car noise generally can be divided three classes, the wind-dryness of the first in travelling, and it two is the transmission to crew module through tire of road surface factor, it three is that excitation by engine causes body vibrations.Wherein, wind-dryness and road surface are that extraneous factor causes, and with regard to vehicle body oneself factor, the noise that Engine Excitation body vibrations causes, is topmost noise source, are also the emphasis of administering.Be the noise that vibration causes, control the emphasis that vibration is exactly work, the way in industry is additional damping on body panel at present, controls vibration.Vehicle body has a lot of plates, where additional damping, append to any degree, still there is no at present proven technique, is additional damping on as far as possible many plates, under the theory of " adding certainly can be wrong ", unordered additional damping, both increase cost, increased again the own wt of vehicle body, be also difficult to improve performance.
Therefore, be desirable to provide a kind of vehicle noise-reduction method that can improve the additional specific aim of damping and accuracy, improve noise reduction, reduce costs.
Summary of the invention
For this reason, the present invention proposes a kind of new vehicle damping noise-reducing method of at least a portion that can address the above problem, reduced blindness and the randomness of additional damping.
The invention provides a kind of vehicle damping noise-reducing method, comprise following operation: (1) by automobile body be used for the mechanical vibration exciter of simulating vehicle engine luggine and be connected; (2) on each plate of vehicle body, vibration transducer is installed, described vibration transducer is recorded the vibration signal of each plate; And (3) at least determine based on described vibration signal the plate that needs additional damping.
Noise-reduction method of the present invention is applied to the design phase of automobile body, in the design phase, diagnose out the vibration noise characteristic of vehicle body, can find in time the design defect of vehicle body aspect vibration noise, noise higher than designing requirement is controlled at before generation, meanwhile form the design proposal of each plate additional damping, reduce blindness and randomness, improved the effect of noise reduction, also reduced cost.
Accompanying drawing explanation
By reading below detailed description of the preferred embodiment, various other advantage and benefits will become cheer and bright for those of ordinary skills.Accompanying drawing is only for the object of preferred implementation is shown, and do not think limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the work schematic diagram of noise-reduction method of the present invention.
Fig. 2 shows the workflow diagram of noise-reduction method of the present invention;
Embodiment
Below in conjunction with accompanying drawing and concrete embodiment, the invention will be further described.
The mechanism that internal car noise produces is that the operational vibration of engine has encouraged body panel, plate radiation noise, through bodywork cavity, be delivered to occupant's ear, so just produced noise, the vehicle maximum noise of higher gears is less than 70 decibels at present, 75 decibels of left and right of low and middle-grade vehicles, internal car noise is the stack of all plates of vehicle body radiated noise under Engine Excitation, each plate is due to residing position, shape, the reason of welding technology, the energy of its radiated noise is different, this is like having a lot of people in our room in speech, but the height of voice is different, also just different to the contribution of overall noise, what we will control is the plate that those radianting capacities are high, the voice of namely talking is high.
For this reason, the invention provides a kind of vehicle damping noise-reducing method, comprise following operation: (1) by automobile body be used for the mechanical vibration exciter of simulating vehicle engine luggine and be connected; (2) on each plate of vehicle body, vibration transducer is installed, described vibration transducer is recorded the vibration signal of each plate; And (3) at least determine based on described vibration signal the plate that needs additional damping.It will be appreciated that, although represent the operation described in the inventive method in the mode of numbering, do not represent that the method carries out according to the order described in label.Fig. 2 shows the workflow diagram of noise-reduction method of the present invention.
Fig. 1 shows the work schematic diagram of noise-reduction method of the present invention.As shown in fig. 1, automobile body 1 adopts compliant member to hang up, and it is connected with a mechanical vibration exciter 3 by hard connecting rod 2, and described mechanical vibration exciter 3 is used for the vibration of simulating vehicle engine.Described mechanical vibration exciter 3 is preferably connected to body exterior.On each plate of vehicle body, vibration transducer 5 is installed, by vibration transducer 5, is recorded the vibration signal of each plate.When mechanical vibration exciter 3 work, its vibration signal sending is delivered to vehicle body 1 by hard connecting rod 2, and vehicle body 1 vibrates, and vibration transducer 5 is recorded the vibration signal that each plate produces.
According to the vibration signal of each plate of vibration transducer record, the intensity of vibration signal is surpassed to the plate additional damping of predetermined threshold.The intensity of described vibration signal is larger, and the ratio of damping of additional damping is larger.Like this, the vibration of vibrating strong plate by alleviating those, has reduced the noise that vibration causes, and has improved the specific aim of additional damping.
The method of the invention can further include, in the crew module of described vehicle, sound pressure meter is set, for recording the noise signal of each plate radiation of described vehicle, thereby further the relation between the intensity based on described noise signal and the intensity of described vibration signal is determined the plate that needs additional damping.Preferably utilize computing machine to come the intensity curve of more described noise signal and the intensity curve of described vibration signal, thereby determine the relation between the two.
As shown in fig. 1, sound pressure meter 4 is set in vehicle passenger compartment, when vibration occurs vehicle body 1, sound pressure meter 4 receives the noise signal of each plate radiation and records.Computing machine 6 is connected with described vibration transducer 5 with described sound pressure meter 4, noise signal and vibration signal that both are recorded are analyzed, compare the intensity curve of noise signal and the intensity curve of each plate vibration signal, determine the relation between the intensity of noise signal and the intensity of vibration signal, for example the vibration signal intensity of each plate and the corresponding relation of noise signal strength.It will be appreciated that, although only there is a vibration transducer 5 to be connected with computing machine 6 in Fig. 1, it will be appreciated by persons skilled in the art that and can have a plurality of vibration transducers 5 to be connected with computing machine 6.
In the method for the invention, using predetermined noise signal intensity as desired value with additional damping on described plate, when the intensity of the noise signal of described sound pressure meter record is not more than described predetermined noise signal intensity, stop additional damping.
In the present invention, a default noise signal strength, for example 70 decibels, as predetermined noise signal intensity.According to the relation between above-mentioned definite noise signal strength and vibration signal intensity, additional damping on the plate of needs, and observe the variation of noise signal strength after additional damping.If noise signal strength is greater than predetermined noise signal intensity, continue additional damping, if when the intensity of noise signal is not more than described predetermined noise signal intensity, stop additional damping.In order to make noise signal strength be not more than predetermined noise signal intensity, can on the large plate of vibration signal intensity, add the damping of large coefficient, also can on the little plate of vibration signal intensity, add the damping of little coefficient, and keep as far as possible the total quantity of additional damping minimum.Like this, additional damping is optimized, has reduced the total quantity of additional damping, alleviated the general assembly (TW) of vehicle body, also reduced cost.
Vehicle damping noise-reducing method of the present invention is applied to the automobile body design phase, therefore, in the design phase, it is the diagnosable vibration noise characteristic that goes out vehicle body, can find in time the design defect of vehicle body aspect vibration noise, before noise higher than designing requirement is controlled to generation, meanwhile form the design proposal of each plate additional damping, the degree of body panel and each plate additional damping by accurate location additional damping, reduced blindness and the randomness of additional damping in prior art, improve the effect of noise reduction, also reduced cost.
It should be noted, the present invention will be described rather than limit the invention for above-described embodiment, and those skilled in the art can design alternative embodiment in the situation that do not depart from the scope of claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and is not listed as element or step in the claims.Being positioned at word " " before element or " one " does not get rid of and has a plurality of such elements.
Claims (10)
1. a vehicle damping noise-reducing method, comprises following operation:
(1) by automobile body be used for the mechanical vibration exciter of simulating vehicle engine luggine and be connected;
(2) on each plate of vehicle body, vibration transducer is installed, described vibration transducer is recorded the vibration signal of each plate; And
(3) at least based on described vibration signal, determine the plate that needs additional damping.
2. method according to claim 1, further comprise, in the crew module of described vehicle, sound pressure meter is set, for recording the noise signal of each plate radiation of described vehicle, thereby further the relation between the intensity based on described noise signal and the intensity of described vibration signal is determined the plate that needs additional damping.
3. method according to claim 1 and 2, wherein, surpasses the plate additional damping of predetermined threshold to the intensity of vibration signal.
4. method according to claim 3, wherein, the intensity of described vibration signal is larger, and the ratio of damping of additional damping is larger.
5. method according to claim 2, wherein, using predetermined noise signal intensity as desired value with additional damping on described plate, when the intensity of the noise signal of described sound pressure meter record is not more than described predetermined noise signal intensity, stop additional damping.
6. method according to claim 2, wherein, utilizes computing machine to come the intensity curve of more described noise signal and the intensity curve of described vibration signal, thereby determines the relation between the two.
7. method according to claim 1, wherein, described mechanical vibration exciter is connected to outside vehicle body.
8. method according to claim 1, wherein, described mechanical vibration exciter is connected with vehicle body by hard connecting rod.
9. method according to claim 1, wherein, described automobile body hangs up by compliant member.
10. according to the method described in claim 1, wherein, described method is applied to the design phase of automobile body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210268392.0A CN103578460A (en) | 2012-07-19 | 2012-07-19 | Vehicle damping noise reduction method |
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| CN201210268392.0A CN103578460A (en) | 2012-07-19 | 2012-07-19 | Vehicle damping noise reduction method |
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| CN103578460A true CN103578460A (en) | 2014-02-12 |
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| CN201210268392.0A Pending CN103578460A (en) | 2012-07-19 | 2012-07-19 | Vehicle damping noise reduction method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106596130A (en) * | 2016-12-20 | 2017-04-26 | 江苏金坛大迈汽车工程研究院有限公司 | Finished automobile noise vibration source detection method and vibration source detection device using same |
| CN110509936A (en) * | 2019-09-03 | 2019-11-29 | 中车青岛四方机车车辆股份有限公司 | A kind of train lightweight denoising structure determines method and relevant apparatus |
| CN113946945A (en) * | 2021-09-28 | 2022-01-18 | 东风柳州汽车有限公司 | Position optimization method for damping plate of cab |
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| US5617315A (en) * | 1992-08-31 | 1997-04-01 | Mazda Motor Corporation | Active vibration damping system for a vehicle |
| US20080144852A1 (en) * | 2006-12-14 | 2008-06-19 | Ford Global Technologies, Llc | Multi-chamber noise control system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106596130A (en) * | 2016-12-20 | 2017-04-26 | 江苏金坛大迈汽车工程研究院有限公司 | Finished automobile noise vibration source detection method and vibration source detection device using same |
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| CN110509936B (en) * | 2019-09-03 | 2021-12-07 | 中车青岛四方机车车辆股份有限公司 | Method for determining train lightweight noise reduction structure and related device |
| CN113946945A (en) * | 2021-09-28 | 2022-01-18 | 东风柳州汽车有限公司 | Position optimization method for damping plate of cab |
| CN113946945B (en) * | 2021-09-28 | 2024-07-23 | 东风柳州汽车有限公司 | Cab damping plate position optimization method |
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