CN111006883A - Automobile air sound insulation weakness optimization method - Google Patents
Automobile air sound insulation weakness optimization method Download PDFInfo
- Publication number
- CN111006883A CN111006883A CN201911406815.9A CN201911406815A CN111006883A CN 111006883 A CN111006883 A CN 111006883A CN 201911406815 A CN201911406815 A CN 201911406815A CN 111006883 A CN111006883 A CN 111006883A
- Authority
- CN
- China
- Prior art keywords
- sound
- sound insulation
- vehicle
- automobile
- noise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention relates to a method for optimizing air sound insulation weakness of an automobile, which comprises the following steps: s1, collecting noise signals of a noise source on the automobile; s2, carrying out an in-vehicle acoustic imaging test on the tested automobile; s3, processing and analyzing the test data obtained in the in-vehicle acoustic imaging test in the step S2 to obtain in-vehicle sound source acoustic imaging of each frequency band; s4, optimizing the sound insulation weakness of the whole vehicle, testing the sound transmission loss from the noise source to the interior of the vehicle, and comparing and analyzing the test result with a target value; and if the frequency section worse than the target value exists in the test result, finding a sound insulation weak point area under the frequency section according to the in-vehicle sound source acoustic imaging in the step S3, and performing sound insulation optimization on the sound insulation weak point area. The method has the advantages that the sound insulation weak area of the whole vehicle can be rapidly and accurately identified, so that the sound insulation weak area is optimized in a targeted manner, and cost reduction and efficiency improvement are realized.
Description
Technical Field
The invention relates to an automobile noise identification technology, in particular to an automobile air sound insulation weakness optimization method.
Background
In recent years, with the development of the automobile industry, the requirements of consumers on the NVH (noise, vibration and comfort) performance of automobiles are higher and higher, especially the performance of the automobiles in sound insulation. The automobile noise mainly comprises engine noise and exhaust port noise generated by automobile acceleration running, wind noise generated by automobile high-speed running, tire noise generated by automobile low-speed running and the like, wherein air sound is mainly distributed in a middle frequency range and is the frequency range most sensitive to human hearing. The good sound insulation performance of the whole automobile can create a more comfortable driving environment, effectively reduce the fatigue of long-distance drivers, optimize the driving experience and improve the market competitiveness of automobile products. At present, the problem of sound insulation of a whole automobile, particularly the problem of sound insulation of air sound of the automobile, is more and more prominent, but a method for specially identifying the weakness of the sound insulation of the air sound of the automobile is not provided. How can discern car air sound insulation weakness to pertinence carries out fixed point optimization, reaches to solve the poor problem of whole car air sound insulation with the minimum cost, realizes cost reduction increase, has become the problem that each big host computer factory needs a lot of solution.
Disclosure of Invention
The invention aims to provide an automobile air sound insulation weakness optimization method to identify and optimize automobile air sound insulation weakness.
The invention relates to an automobile air sound insulation weakness optimization method, which is used for respectively optimizing automobile air sound insulation weakness aiming at a plurality of noise sources on an automobile, wherein the automobile air sound insulation weakness optimization process of each noise source comprises the following steps:
s1, collecting noise signals of a noise source on the automobile, arranging microphones at the periphery of the noise source, and collecting the noise signals of the microphones through data collection equipment in the working state of the noise source;
s2, carrying out in-vehicle acoustic imaging test on the tested automobile, arranging an acoustic imaging system on the tested automobile, arranging a sound generating device at the noise source of the tested automobile, utilizing the sound generating device to generate white noise or play the noise signal collected in the step S1, and carrying out in-vehicle acoustic imaging test by utilizing the acoustic imaging system;
s3, processing and analyzing the test data obtained in the in-vehicle acoustic imaging test in the step S2 to obtain in-vehicle sound source acoustic imaging of each frequency band;
s4, optimizing the sound insulation weakness of the whole vehicle, testing the sound transmission loss from the noise source to the interior of the vehicle, and comparing and analyzing the test result with a target value; if a frequency section worse than the target value exists in the test result, finding a sound source position displayed by the in-vehicle sound source acoustic imaging in the frequency section according to the in-vehicle sound source acoustic imaging in the step S3, wherein the sound source position is a sound insulation weak point area under the frequency section, and performing sound insulation optimization on the sound insulation weak point area.
Further, the data acquisition device comprises a first data acquisition front end connected with the microphone and a first computer connected with the first data acquisition front end.
Further, the sound generating device comprises a sound source, a power amplifier connected with the sound source, a second digital acquisition front end connected with the power amplifier and a second computer connected with the second digital acquisition front end.
Further, the sound source is a volume sound source.
Further, the sound source is for being used for simulating the sound production simulator of the noise source, the overall dimension of sound production simulator and corresponding noise source is unanimous, all be equipped with the several speaker on every face of sound production simulator.
Further, acoustic imaging system include spherical microphone array, with the third number that spherical microphone array links to each other adopts the front end and with the third number that the front end links to each other is adopted to the third computer, be equipped with on the spherical microphone array with the camera that the third computer links to each other, spherical microphone array is located the geometric center department of surveyed car, the third number adopt the front end with the third computer all is located surveyed the car outside.
Further, a plurality of the noise sources include a power system, tires, and exhaust ports.
Further, in step S2, the tested automobile is subjected to an in-vehicle acoustic imaging test in an anechoic test chamber.
Further, step S3 specifically includes: and (4) processing and analyzing the test data obtained in the in-vehicle acoustic imaging test in the step (S2) by using test and analysis software, firstly selecting time domain data with intercepting time being more than or equal to 2S, carrying out A weighting on the time domain data, then carrying out frequency spectrum analysis on the selected time domain data to obtain in-vehicle sound source acoustic imaging of each frequency section corresponding to 1/3 octave, counting the position with the maximum sound pressure level of the in-vehicle sound source in each frequency section, extracting the size of the corresponding sound pressure level, and drawing a maximum sound pressure level graph of each frequency section.
Further, step S4 specifically includes: optimizing the sound insulation weakness of the whole vehicle, testing the sound transmission loss from a noise source to the interior of the vehicle, and comparing and analyzing the test result with a target value; if the frequency section worse than the target value exists in the test result, finding the maximum sound pressure level in the frequency section according to the maximum sound pressure level diagram of each frequency section in the step S3, finding a sound source position corresponding to the maximum sound pressure level according to the in-vehicle sound source acoustic imaging in the step S3, wherein the sound source position is a sound insulation weak point area under the frequency section, and performing sound insulation optimization on the sound insulation weak point area.
The invention has the advantages that the volume sound source playback or the sound production simulator is used for simulating and playing back a plurality of noise sources on the automobile, so that various air sounds on the automobile are separated from the noise of the whole automobile, and the acoustic imaging system is used for quickly and accurately identifying the sound insulation weak point area of the whole automobile, thereby optimizing the sound insulation weak point area in a targeted manner, and realizing cost reduction and efficiency improvement.
Drawings
FIG. 1 is a schematic diagram of a microphone arrangement for noise signal acquisition of a power system;
FIG. 2 is one of the schematic diagrams of the microphone arrangement when the tire is subjected to noise signal collection;
FIG. 3 is a second schematic view of the microphone arrangement for collecting noise signals from a tire;
FIG. 4 is a schematic diagram of microphone placement during noise signal acquisition of the exhaust port;
FIG. 5 is a schematic diagram of the operation of a volume sound source playback method for testing the air sound insulation weakness of an automobile;
FIG. 6 is a schematic diagram of the operation of a powertrain sound simulation method for testing the weaknesses of the air sound insulation of the powertrain;
FIG. 7 is a schematic diagram of the powertrain sounding simulator;
FIG. 8 is a schematic diagram of an acoustic imaging test system connection;
FIG. 9 is a diagram of the maximum sound pressure level of each frequency band of a tested vehicle measured by a powertrain sounding simulator method;
fig. 10 is a schematic diagram showing the comparison between the test result of the sound transmission loss between the cabin and the inside of a tested car and the target value.
Detailed Description
The invention will be further explained with reference to the drawings.
An optimization method for the air sound insulation weakness of an automobile is used for optimizing the air sound insulation weakness of the automobile respectively aiming at a plurality of noise sources on the automobile, and a power system, tires and an exhaust port are taken as the noise sources in the embodiment for detailed description. The equipment used in this embodiment includes a noise signal acquisition system, a sound production device, an acoustic imaging system, and a anechoic test chamber.
The noise signal acquisition system comprises a microphone and data acquisition equipment, wherein the data acquisition equipment comprises a first data acquisition front end connected with the microphone and a first computer connected with the first data acquisition front end. The microphone is a free-field microphone and is used for collecting noise signals.
The sound production device comprises a sound source, a power amplifier 12 connected with the sound source, a second digital acquisition front end 13 connected with the power amplifier 12 and a second computer 14 connected with the second digital acquisition front end 13; the sound source is used for emitting white noise (200-; the power amplifier 12 is used for adjusting the energy of the sound source; the second digital acquisition front end 13 and the second computer 14 are used for controlling the sound source to emit white noise (200-. The sound source can be a volume sound source; the sound source can also be a sound production simulator used for simulating a noise source, the sound production simulator is consistent with the external dimension of the corresponding noise source, and each surface of the sound production simulator is provided with a plurality of loudspeakers. The sounding simulator related in the embodiment is a power assembly sounding simulator, as shown in fig. 7, the appearance of the power assembly sounding simulator is consistent with the appearance size of the power assembly, different numbers of loudspeakers can be arranged on different positions on each surface of the power assembly sounding simulator, and the loudspeakers are connected with the second digital acquisition front end through BNC lines and then connected with a second computer and controlled by the second computer to realize loudspeaker sounding. The power assembly sounding simulator has the advantages that under the control of the second computer, each loudspeaker can independently sound or can sound together, white noise (200-8000 Hz) and noise signals collected by a power system can be sent out, meanwhile, the power assembly sounding simulator is not required to be connected with a vehicle body through a mounting point and is only supported on the ground through a support, when the power system is subjected to noise playback, the influence of structural sound is avoided, and air sound in noise of the power system can be separated.
As shown in fig. 8, the acoustic imaging system includes a spherical microphone array 16, an array fixing foot stand 15, a third data acquisition front end 17 connected to the spherical microphone array 16 through a data acquisition connection line, and a third computer 18 connected to the third data acquisition front end 17 through a network line, a camera connected to the third computer 18 is provided on the spherical microphone array 16, the spherical microphone array is located at the geometric center of the vehicle to be tested, and the third data acquisition front end and the third computer are both located outside the vehicle to be tested. The array fixing foot stand is used for supporting the spherical microphone array, the third data acquisition front end is the testing front end of the acoustic imaging system, the spherical microphone array is used for acquiring acoustic imaging signals in the vehicle, and the third computer is used for acoustic imaging testing and data analysis in the vehicle.
The optimization process of the air sound insulation weakness of the automobile comprises the following steps:
s1, collecting noise signals of a noise source on the automobile, arranging microphones at the periphery of the noise source, and collecting the noise signals of the microphones through data collection equipment in the working state of the noise source; the method comprises the following specific steps:
noise signal acquisition is carried out on the power system: as shown in fig. 1, 2 microphones 2 are arranged on each surface of the engine 1, 12 microphones 2 are arranged in total, the microphones 2 are spaced apart from each other, and the microphones 2 are more than 5cm from the surface of the engine 1. The noise signal acquisition of the power system can be carried out in a silencing room with a rotating hub or on a road, and the test working condition needs to comprise a fixed rotating speed working condition, a 2-gear (the automatic gear type is 1 gear or L gear) full-load acceleration working condition and a 3-gear (the automatic gear type is 2 gears) full-load acceleration working condition. The constant rotating speed working condition comprises a neutral constant rotating speed, a 2-gear constant rotating speed and a 3-gear constant rotating speed, each gear comprises an air throttle, a 1000rpm, a 1500rpm, a 2000rpm, a 2500rpm, a 3000rpm, a 3500rpm, a 4000rpm, a 4500rpm and a 5000rpm rotating speed, and the rotating speed of the engine comprises power system noise under the rotating speed of 1000 plus 6000rpm when the 2-gear full load acceleration working condition and the 3-gear full load acceleration working condition are adopted.
Noise signal acquisition is carried out on the tire: the front wheel noise signal and the rear wheel noise signal can be respectively collected, as shown in fig. 2 and fig. 3, microphones 2 are respectively arranged in the front direction, the rear direction, the inner direction and the outer direction of each tested tire 3, when the front wheel noise signal is collected, a front wheel is installed on a rotating hub, an engine is flamed out, a transmission is in a neutral gear (if the gear is an automatic gear, the engine needs to work, the transmission needs to be in a D gear, and the transmission is prevented from being damaged by dry friction), the rotating hub is pulled over to test vehicles during collection, the rotating hub is respectively set to be 50km/h, 60km/h, 80km/h and other vehicle speeds with the problem of tire radiation noise, and the noise signal collection is carried out after the speed is stable. And when the noise emitted by the rear spoke is collected, referring to the noise emission collection step of the front spoke.
And (3) carrying out noise signal acquisition on the exhaust port: as shown in fig. 4, the reference axis of the microphone is parallel to the ground and at a height that coincides with the height of the exhaust port reference point and makes an angle of 45 ° ± 5 ° with the plane that passes through the exhaust port airflow direction and is perpendicular to the ground. The microphone 2 is directed towards the exhaust port 4, 0.5m from the exhaust port. The test conditions include idle speed, 2-gear full load acceleration and other conditions with exhaust port noise problems. Wherein the MT vehicle tests the neutral air conditioner off and on working conditions (the fan is AT the minimum gear) under the idling working condition, the AT vehicle tests P, N, D the air conditioner off and on working conditions (the fan is AT the minimum gear) under the AT vehicle test, and the engine speed comprises the exhaust port noise of 850 plus 6000rpm under the 2-gear full-load acceleration working condition. Except for the testing personnel in the vehicle, the vehicle is required to be unloaded during the test.
S2, carrying out in-vehicle acoustic imaging test on the tested automobile, arranging an acoustic imaging system on the tested automobile, arranging a sound generating device at the noise source of the tested automobile, utilizing the sound generating device to generate white noise or play the noise signal collected in the step S1, and carrying out in-vehicle acoustic imaging test by utilizing the acoustic imaging system; the method comprises the following specific steps:
before the step S2 begins, equipment connection and debugging are needed, before the equipment connection, the seat of the automobile 6 to be tested needs to be dismounted, the plastic part of the instrument panel needs to be dismounted, the center control armrest box needs to be dismounted, the steering system is reserved, the automobile 6 to be tested can run and move, and then the automobile 6 to be tested is placed in the anechoic test chamber 5; then completing the connection and debugging of the sound generating device and the acoustic imaging system;
carrying out an in-vehicle acoustic imaging test for a power system: a volume sound source method is adopted, as shown in figure 5, namely, the sound producing ports 10 of a volume sound source 11 are respectively placed at the main sound source part (an engine cylinder, an air inlet, a belt pulley, a transmission and a supercharger) of a power system or the sound producing ports 10 of the volume sound source 11 are respectively placed at the arrangement positions of microphones during noise collection of the power system, the volume sound source 11 is controlled to emit white noise (200 and 8000 Hz) or play the noise signals at the power system collected in the step S1 through a second data collection front end 13, a second computer 14 and a power amplifier 12, and after the noise signals are stabilized, an acoustic imaging system is used for testing acoustic imaging in a vehicle; the other method is to adopt a power assembly sound production simulation method, as shown in fig. 6, before the test, the power assembly of the tested vehicle is removed, a power assembly sound production simulator 20 is placed at the position of the power assembly in the engine compartment 19, 12 loudspeakers 21 are arranged in the corresponding area of the power assembly simulator 20 according to the arrangement positions of the microphones during the collection of the noise signals of the power system, and each loudspeaker can emit white noise (200 + 8000 Hz) and play back the noise signals of the power system collected by the microphone at the corresponding position in the step S1 under the control of the second data collection front end 13, the second computer 14 and the power amplifier 12. During testing, the loudspeakers sound independently or together to realize playback of noise signals of the power system, and after the noise signals are stable, the acoustic imaging system is used for testing acoustic imaging in the vehicle.
Performing an in-vehicle acoustic imaging test for a tire: as shown in fig. 5 and 6, the sound outlet 10 of the volume sound source 11 is placed at the position where the microphone is arranged when the tire noise signal is collected in step S1, before the test is started, the volume sound source is controlled by the computer 14, the second digital collecting front end 13 and the power amplifier 12 in the second year to emit white noise (200 and 8000 Hz) or replay the noise signal collected at the tire in step S1, and after the noise signal is stabilized, the acoustic imaging system is used to test the in-vehicle acoustic imaging.
Performing an in-vehicle acoustic imaging test for the exhaust port: as shown in fig. 5 and fig. 6, the sound outlet 10 of the volume sound source 11 is placed at the position where the microphone is arranged when the noise of the exhaust port is collected, and the volume sound source emits white noise (200 and 8000 Hz) or the noise signal collected at the exhaust port in the playback step S1 under the control of the second computer 14, the second digital collection front end 13 and the power amplifier 12, and after the noise signal is stabilized, the acoustic imaging system is used to test the in-vehicle acoustic imaging.
S3, processing and analyzing the test data obtained in the in-vehicle acoustic imaging test in the step S2 to obtain in-vehicle sound source acoustic imaging of each frequency band; the method specifically comprises the following steps: processing and analyzing the test data obtained in the in-vehicle acoustic imaging test in the step S2 by using test and analysis software, firstly selecting time domain data with intercepting time more than or equal to 2S, carrying out A weighting on the time domain data, then carrying out frequency spectrum analysis on the selected time domain data to obtain in-vehicle sound source acoustic imaging of each frequency band corresponding to 1/3 octaves, counting the position with the maximum sound pressure level of the in-vehicle sound source in each frequency band, extracting the size of the corresponding sound pressure level, and drawing a maximum sound pressure level graph of each frequency band as shown in figure 9.
S4, optimizing the sound insulation weakness of the whole vehicle, testing the sound transmission loss from the noise source to the interior of the vehicle, and comparing and analyzing the test result with a target value; if a frequency section worse than the target value exists in the test result, finding a sound source position displayed by the in-vehicle sound source acoustic imaging in the frequency section according to the in-vehicle sound source acoustic imaging in the step S3, wherein the sound source position is a sound insulation weak point area under the frequency section, and performing sound insulation optimization on the sound insulation weak point area. The method specifically comprises the following steps: optimizing the sound insulation weakness of the whole vehicle, testing the sound transmission loss from a noise source to the interior of the vehicle, and comparing and analyzing the test result with a target value; as shown in a schematic diagram of comparison between a test result of sound transmission loss between a cabin and an interior of a tested automobile and a target value in fig. 9, if a frequency band worse than the target value exists in the test result, finding a maximum sound pressure level in the frequency band according to a maximum sound pressure level diagram of each frequency band in step S3, finding a sound source position corresponding to the maximum sound pressure level according to acoustic imaging of the interior sound source in step S3, where the sound source position is a sound insulation weak point region under the frequency band, and performing sound insulation optimization on the sound insulation weak point region. The test process of the sound transmission loss from the noise source to the interior of the vehicle comprises the steps of collecting the noise in the vehicle and then calculating the difference value of the sound pressure level of the noise emitted by the noise source and the noise in the vehicle.
The general principle of optimizing sound insulation of a sound insulation weak area is that the sound insulation performance of the weak area needs to be improved in a key way within 1000Hz, namely, acoustic materials with high density are mainly adopted for sound insulation, such as EVA materials and hard cotton felt materials; the regional gas tightness of sound insulation weak point should be examined at first in the sound insulation weak point region more than 1000Hz, satisfies under the gas tightness requirement prerequisite, and the key promotes sound insulation and sound absorption performance simultaneously again, still need combine sound absorbing materials such as PU material, sound absorption cotton and fibre injection moulding cotton felt to promote the sound insulation performance promptly outside the great acoustic material of adoption density.
Claims (10)
1. The method for optimizing the air sound insulation weakness of the automobile is characterized in that the air sound insulation weakness of the automobile is optimized respectively aiming at a plurality of noise sources on the automobile, and the optimization process of the air sound insulation weakness of the automobile of each noise source comprises the following steps:
s1, collecting noise signals of a noise source on the automobile, arranging microphones at the periphery of the noise source, and collecting the noise signals of the microphones through data collection equipment in the working state of the noise source;
s2, carrying out in-vehicle acoustic imaging test on the tested automobile, arranging an acoustic imaging system on the tested automobile, arranging a sound generating device at the noise source of the tested automobile, utilizing the sound generating device to generate white noise or play the noise signal collected in the step S1, and carrying out in-vehicle acoustic imaging test by utilizing the acoustic imaging system;
s3, processing and analyzing the test data obtained in the in-vehicle acoustic imaging test in the step S2 to obtain in-vehicle sound source acoustic imaging of each frequency band;
s4, optimizing the sound insulation weakness of the whole vehicle, testing the sound transmission loss from the noise source to the interior of the vehicle, and comparing and analyzing the test result with a target value; if a frequency section worse than the target value exists in the test result, finding a sound source position displayed by the in-vehicle sound source acoustic imaging in the frequency section according to the in-vehicle sound source acoustic imaging in the step S3, wherein the sound source position is a sound insulation weak point area under the frequency section, and performing sound insulation optimization on the sound insulation weak point area.
2. The automobile air sound insulation weakness optimization method according to claim 1, characterized in that: the data acquisition device comprises a first data acquisition front end connected with the microphone and a first computer connected with the first data acquisition front end.
3. The automobile air sound insulation weakness optimization method according to claim 1, characterized in that: the sound production device comprises a sound source, a power amplifier connected with the sound source, a second digital acquisition front end connected with the power amplifier and a second computer connected with the second digital acquisition front end.
4. The automobile air sound insulation weakness optimization method according to claim 3, characterized in that: the sound source is a volume sound source.
5. The automobile air sound insulation weakness optimization method according to claim 3, characterized in that: the sound source is for being used for simulating the sound production simulator of the noise source, the overall dimension of sound production simulator and corresponding noise source is unanimous, all be equipped with the several speaker on every of sound production simulator.
6. The automobile air sound insulation weakness optimization method according to claim 1, characterized in that: the acoustic imaging system comprises a spherical microphone array, a third data acquisition front end and a third computer, wherein the third data acquisition front end is connected with the spherical microphone array, the third computer is connected with the third data acquisition front end, a camera is arranged on the spherical microphone array and connected with the third computer, the spherical microphone array is positioned at the geometric center of the automobile to be detected, and the third data acquisition front end and the third computer are both positioned outside the automobile to be detected.
7. The automobile air sound insulation weakness optimization method according to claim 1, characterized in that: a plurality of the noise sources include power systems, tires, and exhaust ports.
8. The automobile air sound insulation weakness optimization method according to claim 1, characterized in that: in step S2, the automobile under test is subjected to an in-vehicle acoustic imaging test in an anechoic test chamber.
9. The automobile air sound insulation weakness optimization method according to claim 1, characterized in that: step S3 specifically includes: and (4) processing and analyzing the test data obtained in the in-vehicle acoustic imaging test in the step (S2) by using test and analysis software, firstly selecting time domain data with intercepting time being more than or equal to 2S, carrying out A weighting on the time domain data, then carrying out frequency spectrum analysis on the selected time domain data to obtain in-vehicle sound source acoustic imaging of each frequency section corresponding to 1/3 octave, counting the position with the maximum sound pressure level of the in-vehicle sound source in each frequency section, extracting the size of the corresponding sound pressure level, and drawing a maximum sound pressure level graph of each frequency section.
10. The method for optimizing air sound insulation weaknesses of an automobile according to claim 9, characterized in that: step S4 specifically includes: optimizing the sound insulation weakness of the whole vehicle, testing the sound transmission loss from a noise source to the interior of the vehicle, and comparing and analyzing the test result with a target value; if the frequency section worse than the target value exists in the test result, finding the maximum sound pressure level in the frequency section according to the maximum sound pressure level diagram of each frequency section in the step S3, finding a sound source position corresponding to the maximum sound pressure level according to the in-vehicle sound source acoustic imaging in the step S3, wherein the sound source position is a sound insulation weak point area under the frequency section, and performing sound insulation optimization on the sound insulation weak point area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911406815.9A CN111006883A (en) | 2019-12-31 | 2019-12-31 | Automobile air sound insulation weakness optimization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911406815.9A CN111006883A (en) | 2019-12-31 | 2019-12-31 | Automobile air sound insulation weakness optimization method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111006883A true CN111006883A (en) | 2020-04-14 |
Family
ID=70119839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911406815.9A Pending CN111006883A (en) | 2019-12-31 | 2019-12-31 | Automobile air sound insulation weakness optimization method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111006883A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964480A (en) * | 2021-02-24 | 2021-06-15 | 浙江合众新能源汽车有限公司 | Sound leakage testing method for car door sealing strip |
| CN113405814A (en) * | 2021-06-24 | 2021-09-17 | 中国第一汽车股份有限公司 | Method, device, equipment and medium for identifying wind noise sealing weakness of vehicle |
| CN113468664A (en) * | 2021-06-30 | 2021-10-01 | 重庆长安汽车股份有限公司 | Arrangement method of vehicle acoustic packaging system |
| CN113624335A (en) * | 2021-10-09 | 2021-11-09 | 江铃汽车股份有限公司 | Method for testing and evaluating exhaust airflow sound in vehicle rapid acceleration process |
| CN114720150A (en) * | 2022-03-30 | 2022-07-08 | 襄阳达安汽车检测中心有限公司 | Test method and test system for sound insulation performance of whole vehicle |
| CN115817092A (en) * | 2023-01-03 | 2023-03-21 | 重庆长安汽车股份有限公司 | Air supply control method, device and equipment for air suspension and storage medium |
| CN116296431A (en) * | 2022-12-28 | 2023-06-23 | 佩尔哲汽车内饰系统(太仓)有限公司 | Acoustic test and analysis method for extended range new energy automobile |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494754A (en) * | 2011-12-20 | 2012-06-13 | 重庆长安汽车股份有限公司 | Rapid identification method of noise source contributions in car based on order dispersion |
| CN104062075A (en) * | 2014-07-04 | 2014-09-24 | 奇瑞汽车股份有限公司 | Finished automobile sound transmission loss testing method |
| CN106383035A (en) * | 2016-11-18 | 2017-02-08 | 华晨汽车集团控股有限公司 | Muffler transmission loss testing system and muffler transmission loss testing method for aiming at aerodynamic noise |
| CN106996828A (en) * | 2017-05-04 | 2017-08-01 | 安徽江淮汽车集团股份有限公司 | The method for predicting the in-car noise contribution amount size of accelerating mode |
| CN108267321A (en) * | 2016-12-30 | 2018-07-10 | 华晨汽车集团控股有限公司 | A kind of test and evaluation method of car acpistocs packaging sound absorption performance |
| US20180211647A1 (en) * | 2017-01-25 | 2018-07-26 | Panasonic Intellectual Property Management Co., Ltd. | Active noise reduction device, vehicle, and abnormality determination method |
| CN108732248A (en) * | 2017-04-25 | 2018-11-02 | 江铃汽车股份有限公司 | A kind of vehicle body is to engine noise sound-insulation capability test method |
| CN109211588A (en) * | 2018-09-27 | 2019-01-15 | 安徽江淮汽车集团股份有限公司 | A kind of test method of front wall sound insulation set group vulnerability analysis |
| WO2019021080A1 (en) * | 2017-07-28 | 2019-01-31 | Pirelli Tyre S.P.A. | Process and apparatus for applying noise reducer elements to tyres for vehicle wheels |
| CN109724811A (en) * | 2018-12-21 | 2019-05-07 | 江苏大学 | A kind of structure transmission path detection system of passenger compartment sound quality |
-
2019
- 2019-12-31 CN CN201911406815.9A patent/CN111006883A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494754A (en) * | 2011-12-20 | 2012-06-13 | 重庆长安汽车股份有限公司 | Rapid identification method of noise source contributions in car based on order dispersion |
| CN104062075A (en) * | 2014-07-04 | 2014-09-24 | 奇瑞汽车股份有限公司 | Finished automobile sound transmission loss testing method |
| CN106383035A (en) * | 2016-11-18 | 2017-02-08 | 华晨汽车集团控股有限公司 | Muffler transmission loss testing system and muffler transmission loss testing method for aiming at aerodynamic noise |
| CN108267321A (en) * | 2016-12-30 | 2018-07-10 | 华晨汽车集团控股有限公司 | A kind of test and evaluation method of car acpistocs packaging sound absorption performance |
| US20180211647A1 (en) * | 2017-01-25 | 2018-07-26 | Panasonic Intellectual Property Management Co., Ltd. | Active noise reduction device, vehicle, and abnormality determination method |
| CN108732248A (en) * | 2017-04-25 | 2018-11-02 | 江铃汽车股份有限公司 | A kind of vehicle body is to engine noise sound-insulation capability test method |
| CN106996828A (en) * | 2017-05-04 | 2017-08-01 | 安徽江淮汽车集团股份有限公司 | The method for predicting the in-car noise contribution amount size of accelerating mode |
| WO2019021080A1 (en) * | 2017-07-28 | 2019-01-31 | Pirelli Tyre S.P.A. | Process and apparatus for applying noise reducer elements to tyres for vehicle wheels |
| CN109211588A (en) * | 2018-09-27 | 2019-01-15 | 安徽江淮汽车集团股份有限公司 | A kind of test method of front wall sound insulation set group vulnerability analysis |
| CN109724811A (en) * | 2018-12-21 | 2019-05-07 | 江苏大学 | A kind of structure transmission path detection system of passenger compartment sound quality |
Non-Patent Citations (2)
| Title |
|---|
| 谢晓龙等: "一种基于声功率的整车降噪试验方法", 《LMS用户大会征文》 * |
| 郑长聚 等编: "《实用工业噪声控制技术》", 31 August 1982 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964480A (en) * | 2021-02-24 | 2021-06-15 | 浙江合众新能源汽车有限公司 | Sound leakage testing method for car door sealing strip |
| CN113405814A (en) * | 2021-06-24 | 2021-09-17 | 中国第一汽车股份有限公司 | Method, device, equipment and medium for identifying wind noise sealing weakness of vehicle |
| CN113468664A (en) * | 2021-06-30 | 2021-10-01 | 重庆长安汽车股份有限公司 | Arrangement method of vehicle acoustic packaging system |
| CN113624335A (en) * | 2021-10-09 | 2021-11-09 | 江铃汽车股份有限公司 | Method for testing and evaluating exhaust airflow sound in vehicle rapid acceleration process |
| CN113624335B (en) * | 2021-10-09 | 2022-01-25 | 江铃汽车股份有限公司 | Method for testing and evaluating exhaust airflow sound in vehicle rapid acceleration process |
| CN114720150A (en) * | 2022-03-30 | 2022-07-08 | 襄阳达安汽车检测中心有限公司 | Test method and test system for sound insulation performance of whole vehicle |
| CN114720150B (en) * | 2022-03-30 | 2023-09-12 | 襄阳达安汽车检测中心有限公司 | Test method and test system for sound insulation performance of whole vehicle |
| CN116296431A (en) * | 2022-12-28 | 2023-06-23 | 佩尔哲汽车内饰系统(太仓)有限公司 | Acoustic test and analysis method for extended range new energy automobile |
| CN115817092A (en) * | 2023-01-03 | 2023-03-21 | 重庆长安汽车股份有限公司 | Air supply control method, device and equipment for air suspension and storage medium |
| CN115817092B (en) * | 2023-01-03 | 2024-05-10 | 重庆长安汽车股份有限公司 | Air suspension air supply control method, device, equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111006883A (en) | Automobile air sound insulation weakness optimization method | |
| CN111209655B (en) | Method for calculating and evaluating transmission squeaking sound in vehicle | |
| JP6325663B2 (en) | Method for determining noise sound contribution of noise source of motor driven moving body | |
| Li | A state-of-the-art review of measurement techniques on tire–pavement interaction noise | |
| Panza | A review of experimental techniques for NVH analysis on a commercial vehicle | |
| CN110400558B (en) | Noise detection and noise reduction method for vehicle fuel cell engine system | |
| CN106515627A (en) | Vehicle sound enhancement | |
| CN108545041A (en) | A method of reducing interior idle noise | |
| JP2021152500A (en) | Abnormal sound determination device and abnormal sound determination method | |
| CN109211588B (en) | Test method for front wall sound insulation sleeve group weakness analysis | |
| US3695098A (en) | Method and apparatus for isolating and measuring vehicle noise | |
| CN110718207A (en) | Sound synthesis precision verification method for active sound production system and active sound production system | |
| Cao et al. | Electric vehicle interior noise contribution analysis | |
| CN109946091A (en) | A method of evading vehicle body low-frequency noise problem | |
| CN109406160A (en) | Low speed brakes CVT gearbox abnormal sound test when driving and analysis system and method | |
| CN113689842A (en) | Integrated system for active noise reduction and audio power amplification of automobile | |
| CN111554262A (en) | Automobile noise reduction system and automobile using same | |
| CN114483559B (en) | Noise risk assessment method for electric air conditioner compressor | |
| CN110889181A (en) | Sound amplitude control precision verification method and active sound production system | |
| CN108760889A (en) | Automotive floor panel utters long and high-pitched sounds air radiation acoustical damping properties recognition methods to rear axle | |
| Schuhmacher et al. | Indoor pass-by noise contribution analysis using source path contribution concept | |
| Kohli et al. | Experimental determination of acoustic cavity resonances of vehicle sub-systems | |
| Brentnall et al. | Methods and solutions for the integration of the HV battery into the NVH development of a BEV | |
| CN114187885A (en) | Method and device for generating sound-absorbing cotton arrangement scheme | |
| CN113624335A (en) | Method for testing and evaluating exhaust airflow sound in vehicle rapid acceleration process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200414 |
|
| RJ01 | Rejection of invention patent application after publication |