CN102998124B - NVH (noise, vibration and harshness) semi-anechoic room test system and method - Google Patents
NVH (noise, vibration and harshness) semi-anechoic room test system and method Download PDFInfo
- Publication number
- CN102998124B CN102998124B CN201110265650.5A CN201110265650A CN102998124B CN 102998124 B CN102998124 B CN 102998124B CN 201110265650 A CN201110265650 A CN 201110265650A CN 102998124 B CN102998124 B CN 102998124B
- Authority
- CN
- China
- Prior art keywords
- dynamometer machine
- sound
- coupling shaft
- nvh
- dynamometer
- 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.)
- Active
Links
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses NVH (noise, vibration and harshness) semi-anechoic room test system and method. The NVH semi-anechoic room test system comprises an anechoic room, a dynamometer chamber, a sound arrester and a sound-proof wall. The anechoic room is used for containing a device to be tested. A test bench base is arranged in the anechoic room, and the device to be tested is fixed on the test bench base. Elastic dampers are disposed between the test bench base and the base floor in the anechoic room. The dynamometer chamber is used for containing a test device. The test device comprises a dynamometer. The dynamometer chamber is provided with a dynamometer bottom plate. The test device is fixed on the dynamometer bottom plate. Elastic dampers are disposed between the dynamometer bottom plate and the base floor in the dynamometer chamber. The sound arrester encloses the device to be tested so as to spatially isolate the anechoic room and the dynamometer chamber and isolate sound. The soundproof wall is provided with a plurality of connecting shafts which penetrate through the soundproof wall in soundproof manner and are used for connecting the test device and the device to be tested for testing. The NVH semi-anechoic room test system can meet the multi-mode test needs and is effective in sound proofing and accurate in test data.
Description
Technical field
The present invention relates to vehicle NVH to test, particularly relate to a kind of NVH semianechoic room test macro and a kind of NVH semianechoic room method of testing.
Background technology
What require automobile product along with the day by day fierce of automobile market competition and market becomes more diverse, and NVH (noise noise, vibration Vibration and ride comfort Harshness) is tested to it is also proposed challenge.Statistical data shows, and car load about has the failure problems of 1/3 to be relevant with the NVH problem of vehicle, and the R & D Cost consumption of each major company nearly 20% is in the NVH problem solving vehicle.The development of NVH research presents following features:
1. complete test capability will be the guarantee that product NVH performance improves;
2. be applied in entire vehicle design process, substantially synchronously carry out with whole performance history;
3. computer simulation technique is in the widespread use of NVH research field;
4.NVH research category expands further, comprises the Design of Auto Parts and the content such as intensity and fail-safe analysis.
But traditional power assembly testing laboratory can only carry out the independent noise testing of engine, the needs that combined tests such as carrying out wheel box, engine and wheel box, vehicle bridge and wheel box and multi-mode are tested can not be met simultaneously.And, the measurement of power of the testing apparatus of traditional power assembly testing laboratory or electric system and engine tested separately or wheel box etc. do not carry out isolation spatially, although or separate to arrange between testing apparatus and two rooms of tested equipment and do not take effectively to insulate against sound and noise countermeasure.There is measurement of power or electric system is radiated the larger problem of power assembly test bay noise.Along with the needs of power assembly noise research, in order to not affect the needs of engine, wheel box, power assembly (engine, wheel box and back axle) noise testing, power assembly testing laboratory should carry out acoustical insulation sound-deadening.
A kind of semianechoic room test macro of prior art as shown in Figure 1, as shown in Figure 1, just testing apparatus (such as dynamometer machine 6) and tested equipment (such as independent engine and wheel box) are separated and sound insulation by simple body of wall 4 of using, and arrange wedge deadener 41 in tested equipment side to carry out the noise elimination of tested equipment side.Testing apparatus and tested equipment are connected to the two axial ends 52,56 of coupling shaft 5.
Testing apparatus is connected to dynamometer machine base plate 7, and dynamometer machine base plate 7 comprises iron plate 71 and cement layer 72, is provided with elastic damping 70 between dynamometer machine base plate 7 and foundation ground 9.The bottom of the bracing or strutting arrangement 51 of the axle head 52 of coupling shaft 5 is also connected to dynamometer machine base plate 7.Tested equipment connection is in testboard bay basis 8, and testboard bay basis 8 also comprises iron plate 81 and cement layer 82, is provided with elastic damping 80 between testboard bay basis 8 and foundation ground 9.The bottom of the bracing or strutting arrangement 57 of the axle head 56 of coupling shaft 5 is also connected to testboard bay basis 8.
Traditional power assembly testing laboratory is except carrying out except the independent noise testing of engine etc., its wedge muffled mode also has a lot of shortcoming, such as: wedge deadener 41 easily aging, distortion anti-impact force is poor, adsorb oil smoke, dust, after the certain time limit of use (such as 7 years) be namely stained with that greasy dirt cannot clean, Acceptable life is short, deficiency etc. to low-frequency signal processing, and as shown in Figure 1, the length of wedge deadener 41 is longer, general at about 1.2 meters, therefore occupy a large amount of spaces, reduce the space availability ratio in power assembly laboratory.
Summary of the invention
For problems of the prior art, object of the present invention can meet the multi-modes such as noise such as carrying out wheel box, engine and wheel box, vehicle bridge and wheel box simultaneously test that the acoustical insulation sound-deadening of needs is effective, test data NVH semianechoic room test macro accurately for providing a kind of.
Another object of the present invention is to provide a kind of NVH semianechoic room method of testing.
For achieving the above object, technical scheme of the present invention is as follows:
. a kind of NVH semianechoic room test macro, comprising: anechoic room, for accommodating tested equipment; Have testboard bay basis in described anechoic room, described tested equipment is fixed on described testboard bay basis, is provided with elastic damping between the foundation ground in described testboard bay basis and described anechoic room; Between dynamometer machine, for accommodating testing apparatus, described testing apparatus comprises dynamometer machine, has dynamometer machine base plate between described dynamometer machine, described testing apparatus is fixed on described dynamometer machine base plate, is provided with elastic damping between the foundation ground between described dynamometer machine base plate and described dynamometer machine; Sound arrester, described in ring cover, tested equipment is arranged, so that space between described anechoic room and described dynamometer machine is isolated and to be insulated against sound; Described sound-proof wall is equipped with to sound insulation and connects described testing apparatus and described tested equipment to carry out multiple coupling shafts of described test for axle.
A kind of NVH semianechoic room method of testing, comprise step: by tested equipment layout in anechoic room, tested equipment is fixed on the testboard bay basis of anechoic room, between the foundation ground in described testboard bay basis and described anechoic room, elastic damping is set to insulate against sound; The described testing apparatus comprising dynamometer machine is fixed on the dynamometer machine base plate between dynamometer machine, elastic damping is set between the foundation ground between described dynamometer machine base plate and described dynamometer machine to insulate against sound; With tested equipment described in sound arrester ring cover so that space between described anechoic room and described dynamometer machine is isolated and to be insulated against sound, what described sound-proof wall insulated against sound wears coupling shaft; Described testing apparatus is connected by described coupling shaft axle with described tested equipment, carries out described test.
Beneficial effect of the present invention is, NVH semianechoic room test macro of the present invention and NVH semianechoic room method of testing of the present invention, and tool has the following advantages:
1, due to multiple connection shaft design of sound-proof wall, whole system (i.e. whole NVH semianechoic room test macro, lower same) can meet simultaneously carry out engine and parts; Wheel box; Engine+wheel box; The performance of multiple test patterns such as motor+wheel box and noise testing need.
2, by " in room room " structure of anechoic room, effectively by between tested equipment and dynamometer machine and whole system insulate against sound, improve NVH semianechoic room test macro and method testing data accuracy.
3, dull and stereotyped sound absorption (or noise reduction) pattern is used, dull and stereotyped acoustic absorbant be not easy aging, distortion anti-impact force by force, not easily adsorbs oil smoke, dust, can clean, Acceptable life is long, have advantage to low-frequency signal processing, and dull and stereotyped acoustic absorbant length is shorter, improves the space availability ratio of anechoic room and whole system.
Accompanying drawing explanation
Fig. 1 is the cross-sectional schematic of the semianechoic room test macro of prior art.
Fig. 2 is the cross-sectional schematic of NVH semianechoic room test macro of the present invention.
Fig. 3 is the first test pattern schematic diagram of NVH semianechoic room test macro of the present invention.
Fig. 4 is the second test pattern schematic diagram of NVH semianechoic room test macro of the present invention.
Fig. 5 is the 3rd test pattern schematic diagram of NVH semianechoic room test macro of the present invention.
Fig. 6 is the 4th test pattern schematic diagram of NVH semianechoic room test macro of the present invention.
Fig. 7 is the 5th test pattern schematic diagram of NVH semianechoic room test macro of the present invention.
Fig. 8 is the 6th test pattern schematic diagram of NVH semianechoic room test macro of the present invention.
Embodiment
The exemplary embodiments embodying feature & benefits of the present invention will describe in detail in the following description.Be understood that the present invention can have various changes in different embodiments, it neither departs from the scope of the present invention, and explanation wherein and accompanying drawing are the use when explain in itself, and is not used to limit the present invention.
The NVH semianechoic room test macro of the embodiment of the present invention, the combination of NVH semianechoic room method of testing to automobile engine assembly, engine component or engine and parts of the embodiment of the present invention can be used to test, but be not limited to use NVH semianechoic room method of testing of the present invention test.Equally, the NVH semianechoic room test macro of the embodiment of the present invention, can realize the NVH semianechoic room method of testing of the embodiment of the present invention, but be not limited to use NVH semianechoic room test macro of the present invention realize.
First introduce one-piece construction and the function of the NVH semianechoic room test macro of the preferred embodiment of the present invention below, and then how the NVH semianechoic room method of testing introducing the preferred embodiment of the present invention carries out testing and can carrying out the test of those patterns.
As shown in Figure 2, embodiment of the present invention NVH semianechoic room test macro, can be used in the test of automobile engine assembly and engine component, described NVH semianechoic room test macro mainly to comprise between dynamometer machine 1, anechoic room 2 and sound-proof wall device, sound arrester comprises sound-proof wall 3 and sound insulation roof etc., also can comprise test macro, illuminator, shooting and monitoring system and the door etc. for passing in and out.Wherein, be that anechoic room 2 is isolated into " in a room room " structure by sound-proof wall 3.
Anechoic room 2, for accommodating tested equipment; Tested equipment such as can be engine, wheel box, engine+wheel box, vehicle bridge, wheel box+vehicle bridge etc.There is in anechoic room 2 testboard bay basis 8, tested equipment is fixed on testboard bay basis 8, testboard bay basis 8 is arranged on foundation ground 9 in a concave shape in anechoic room 2, testboard bay basis 8 comprises iron plate 81 and cement layer 82, elastic damping 80 is provided with between testboard bay basis 8 and foundation ground 9, elastic damping 80 is such as rubber blanket or multilayer rubber pad, rubber blanket is array distribution in the bottom on testboard bay basis 8, up to a hundred can be had, to ensure the stability on testboard bay basis 8.
And between dynamometer machine 1, for accommodating testing apparatus, testing apparatus can be two, the dynamometer machine 6 of more than three or three, preferably three dynamometer machines 6, between dynamometer machine, 1 has dynamometer machine base plate 7, dynamometer machine 6 is fixed on dynamometer machine base plate 7, dynamometer machine base plate 7 to be arranged between dynamometer machine foundation ground 9 in a concave shape in 1, dynamometer machine base plate 7 comprises iron plate 71 and cement layer 72, elastic damping 70 is provided with between dynamometer machine base plate 7 and foundation ground 9, rubber blanket is array distribution in the bottom of dynamometer machine base plate 7, up to a hundred can be had, to ensure the stability of dynamometer machine base plate 7.The natural frequency of elastic damping 70,80 is preferably less than 8Hz.
Sound-proof wall 3, can be individual layer, bilayer or multilayer wall, arrange, except foundation ground 9 around described tested equipment, be used for that space between described anechoic room and described dynamometer machine is isolated and insulated against sound, sound arrester also comprises on " the sound insulation roof " of the tested equipment of ring cover together with sound-proof wall; Sound-proof wall 3 is equipped with coupling shaft 5, coupling shaft 5 is for axle connecting test equipment and tested equipment to carry out described test, and coupling shaft has multiple, adapts with the number of dynamometer machine, to connect multiple testing apparatus simultaneously.Each coupling shaft 5 has two axle heads 52,56, and axle head 52,56 is supported by bracing or strutting arrangement 51,57 respectively, and the bottom of bracing or strutting arrangement 51,57 is also connected to dynamometer machine base plate 8, testboard bay basis 8.
Anechoic room 2 preferably rectangular shape, but also can be other shapes such as cylinder, polygon prism, be introduced for rectangular parallelepiped below.Three sound-proof walls 3 in four sides of the anechoic room 2 of rectangular parallelepiped are equipped with coupling shaft 5, have two coupling shaft 5 conllinear wherein, be arranged in two relative sides respectively.The sound-proof wall 4 of four sides of the anechoic room 2 of rectangular parallelepiped can comprise interior wall 33, exterior wall 31 and air blanketing 32, and interior wall 33 is in anechoic room 2 side, and exterior wall 31 is 1 side between dynamometer machine, and air blanketing 32 is between interior wall 33 and exterior wall 31.In order to ensure soundproof effect, be sticked inside interior wall 33 dull and stereotyped acoustic absorbant 34, and require lower exterior wall 31 side for eliminating the noise, then can be sticked lower-cost Sound-proof material 30, and the thickness of Sound-proof material also can be less than the thickness of dull and stereotyped acoustic absorbant 34.Be filled with glass silk flosssilk wadding in air blanketing 32, strengthen defening effect.The described sound insulation roof of anechoic room 2 also adopts identical structure and material with four sides, isolates with 1 space between dynamometer machine and insulates against sound.
As shown in Figure 2, each coupling shaft 5 is also all arranged with silencing plate 55, to reduce its noise effect to anechoic room 2, coupling shaft 5 extends about 1 meter to anechoic room 2 side, is the noise effect in order to reduce anechoic room 2 too.Further, in order to make will there be good sound insulation measure between 1 and anechoic room 2 between dynamometer machine, coupling shaft 5 also will have good sound insulation measure, to reach the requirement of anechoic room 2 background noise through the porthole place of sound-proof wall 3.When therefore wearing coupling shaft 5 in sound-proof wall 3, pad between coupling shaft 5 and sound-proof wall 3 and establish rubber washer 53,54 to insulate against sound, when mounted, first rubber washer 53,54 is sheathed on coupling shaft 5 periphery, after coupling shaft 5 installs, rubber washer 53,54 is individually fixed in exterior wall 31 and interior wall 33, between rubber washer 53,54 inner circumferential and coupling shaft 5 periphery, there is certain interval, with the rotation of obstruction free coupling shaft 5.
The volume of anechoic room 2 is relevant with the volume size of tested equipment, and according to the regulation of international standard ISO3745, the volume of anechoic room 2 should be not less than 200 times of tested product volume.Therefore, according to the test needs of whole system, installing the rear anechoic room 2 of acoustic absorbant 41 is 9 meters × 8 meters × 5 meters.Dull and stereotyped acoustic absorbant 34 for band circular hole steel plate and CARUSO (Caruso) cotton, thus radiomaterial does not exceed standard, and fiberless working component, make to fly upward without mineral fiber in air, light reflection is good, improves working environment, has ensured the health of worker.The thickness of dull and stereotyped acoustic absorbant 34 is 350mm, compared with 1.2 meters short much of the wedge acoustic absorbant of prior art, saves the volume that sqound absorption construction occupies, therefore adds the useful volume of anechoic room 2 greatly.Under above-mentioned each size condition, the width of air blanketing 32 can be 0.1 meter.
The sound absorption process of anechoic room 2 is the keys ensureing to obtain after anechoic room 2 builds up good free found field characteristic.The anechoic room 2 of NVH semianechoic room test macro of the present invention adopts the dull and stereotyped acoustic absorbant 34 of NEW TYPE OF COMPOSITE, not only short compared with the length of the wedge deadener of wedge pattern, saves space, facilitates assigning a work of the tested equipment in anechoic room 2; And dull and stereotyped acoustic absorbant 34 is indeformable, can clear up; The poriness clad can receiving greasy dirt can be laid in the surface of dull and stereotyped acoustic absorbant 34, is convenient to clean and safeguards.Except to the process of high-frequency signal and wedge pattern quite except, dull and stereotyped acoustic absorbant 34 has greater advantage at low-frequency signal processing, and dull and stereotyped acoustic absorbant pattern becomes the selection that newly-built anechoic room is applicable to user demand the most.
And between dynamometer machine 1 acoustical demands to meet the requirement of anechoic room ground unrest for target.Therefore, in whole system and anechoic room 2, as test macro, illuminator, shooting and monitoring system etc. will have corresponding sound absorption measure, the free found field characteristic of anechoic room 2 can not be affected.Will there be good sound absorption measure in the air port of the air-conditioning of whole system especially in anechoic room 2, cooling-fan installation, guarantees the requirement of anechoic room 2 background noise.
For ensureing the requirement of neighbourhood noise in design objective, the door of anechoic room 2 can be and comprises sound absorption door, soundproof door, intermediate course and outmost fire-proof door from the inside to surface, and the sound reduction index Rw of door needs to be greater than 55dB (A).
The natural frequency of elastic damping 70,80 is less than or equal to 8hz, and avoids testing apparatus, tested equipment, testboard bay basis 8 and the resonant frequency of dynamometer machine base plate 7 etc., avoids and resonates with other system with anechoic room 2, testboard bay basis 8 etc.
Introduce the NVH semianechoic room method of testing of the embodiment of the present invention below again, the NVH semianechoic room method of testing of the embodiment of the present invention comprises step:
By tested equipment layout in anechoic room 2, tested equipment is fixed on the testboard bay basis 8 of anechoic room 2, between testboard bay basis 8 and foundation ground 9, elastic damping 80 is set to insulate against sound; The testing apparatus comprising dynamometer machine 6 is connected to the dynamometer machine base plate 7 of between dynamometer machine 1, elastic damping 70 is also set between dynamometer machine base plate 7 and foundation ground 9 to insulate against sound.
With sound-proof wall 3 and the tested equipment of sound insulation roof ring cover, 1 space between anechoic room 2 and dynamometer machine is isolated and insulated against sound, on sound-proof wall 3, sound insulation wears coupling shaft 5;
Testing apparatus is connected by coupling shaft 5 axle with tested equipment, carries out various test.
As shown in the vertical view of Fig. 3-Fig. 8, three dynamometer machines can be used to test as testing apparatus, dynamometer machine preferably exchanges transient state dynamometer machine, First dynamometer machine, namely dynamometer machine 1 uses the interchange transient state dynamometer machine that rated power is 250kW, nominal torque is 800NM, rated speed is 8000rpm; And another two dynamometer machines and dynamometer machine 2 and dynamometer machine 3 use that rated power is 400kW, nominal torque is 2700NM, rated speed is 7500rpm exchanges transient state dynamometer machine, above-mentioned three dynamometer machines, can do properties development experiments and the every test of power assembly of slow-speed of revolution high-power engine and high rotating speed low-powered engine.Each dynamometer machine all can in respective rated power, nominal torque and rated speed with the various different power of Imitating, moment of torsion and rotating speed.
Dynamometer machine 1, dynamometer machine 2 and dynamometer machine 3 are respectively by coupling shaft 1, coupling shaft 2 and coupling shaft 3 and tested equipment connection, and coupling shaft 2 and coupling shaft 3 conllinear, coupling shaft 1 can be vertical with coupling shaft 2.Under normal circumstances, each dynamometer machine namely according to angle fixed and arranged as shown in Figure 7, and connects with respective be connected coupling shaft.
The NVH semianechoic room test macro of the embodiment of the present invention and method, can by following six kinds of test pattern connecting test equipment and tested testing equipment, but the present invention is not limited to this six kinds of patterns.Each test pattern, all can carry out steady state test and metastable state test, under each test pattern, NVH main research is that frame and Noise Sources Identification etc. are turned round by 1m sound pressure level and acoustical power, near field sound intensity testing, structural vibration, axle system, test mainly through sound meter, acoustic intensity unit and acceleration transducer etc., exploitation checking, the diagnosis of carrying out NVH are resolved and are improved and instruct.
As shown in Figure 3, the first test pattern, MODE name is 400LD: testing apparatus is dynamometer machine 1, and tested equipment is the engine 1 of a lower-wattage, and dynamometer machine 1 to be connected with described engine 1 axle by coupling shaft 1 to be tested;
As shown in Figure 4, the second test pattern, MODE name is 400HD: testing apparatus is dynamometer machine 2, and tested equipment is the engine 2 that power is greater than the engine 1 in described first test pattern, and dynamometer machine 2 is connected with engine 2 axle by coupling shaft 1; Certainly, this test pattern also can be tested with using in the first test pattern identical dynamometer machine, such as, all use dynamometer machine 2 to test.
As shown in Figure 5,3rd test pattern, MODE name is 411: testing apparatus is the dynamometer machine 3 of dynamometer machine 2 and simulated machine, and tested equipment is wheel box, dynamometer machine 2 is connected with gear-box axle by coupling shaft 2, and dynamometer machine 3 is connected with gear-box axle by coupling shaft 3;
As shown in Figure 6, the 4th test pattern, MODE name is 402: testing apparatus is dynamometer machine 2 and dynamometer machine 3, and tested equipment is the combination of engine, wheel box and vehicle bridge, i.e. engine assembly.Dynamometer machine 2 is connected with axle shaft by coupling shaft 2, and dynamometer machine 3 is connected with axle shaft by coupling shaft 3;
As shown in Figure 7,5th test pattern, MODE name is 412 not with wheel box: testing apparatus is the dynamometer machine 1 of dynamometer machine 2, dynamometer machine 3 and simulated machine, tested equipment is vehicle bridge, the dynamometer machine 1 of simulated machine is connected with axle shaft by coupling shaft 1, dynamometer machine 2 is connected with axle shaft by coupling shaft 2, and dynamometer machine 3 is connected with axle shaft by coupling shaft 3;
As shown in Figure 8,6th test pattern, MODE name is 412 band wheel boxes: testing apparatus is the dynamometer machine 1 of dynamometer machine 2, dynamometer machine 3 and simulated machine, tested equipment is the combination of wheel box and vehicle bridge, dynamometer machine 1 coupling shaft 1 is connected with gear-box axle, dynamometer machine is connected with described 3rd axle shaft by the second coupling shaft, and described 3rd dynamometer machine is connected with described 3rd axle shaft by the 3rd coupling shaft.
The tested equipment of the same names mentioned in different mode, except particularly pointing out, both can be same vehicle bridge, same wheel box or same engine, also can be different vehicle bridge, different wheel boxes and different engines.
The main application of NVH semianechoic room test macro of the present invention and method of testing is as follows:
1, the matching optimization of electric control gasoline engine noise and discharge is demarcated, and the matching optimization of diesel combustion and noise is demarcated (using Combustion tester to do the Optimized Matching of diesel combustion and noise).
2, the Optimized Matching of different displacements power assembly and different each shelves ratio gearbox and different base ratio back axle designs, performance development, demarcation (noise testing, simultaneously also test projects such as dynamic property, economy and discharges) and the optimal design of wheel box develop.
3, noise rating is carried out to the supplier's product manufacturing the engine of certain automobile, wheel box and front-rear axle, and provide scientific basis for the product quality of entrucking.(as: judge Main Noise Sources whether a certain engine assembly has second-order inertia power and second-order inertia moment unbalance to produce etc., determine the product quality of supplier, and for purchasing the foundation providing science).
4, the vibration of combustion engine powered assembly, noise rating, sunykatuib analysis, experimental study and the exploitation (comprising the power assembly of preposition front wheel driving form) such as diagnosis and improvement.
5, the noise testing of auto parts and components etc.
6, combustion engine powered assembly has a lot of characteristic frequency in low frequency range, evaluates harmonic wave, fundamental frequency noise Acoustics Analysis.This test macro belongs to pioneering at home and abroad, and reaches world-class levels.
To sum up, the NVH semianechoic room test macro of the embodiment of the present invention and NVH semianechoic room method of testing of the present invention, mainly have the following advantages:
1, due to the design of multiple coupling shafts 5 of sound-proof wall 3, whole system can meet simultaneously carries out engine and parts; Wheel box; Engine+wheel box; The performance of multiple test patterns such as motor+wheel box and noise testing need.
2, by " in room room " structure of anechoic room 2, effectively tested equipment and whole system are carried out space and isolate and sound insulation, improve NVH semianechoic room test macro and method testing data accuracy.
3, use dull and stereotyped acoustic absorbant pattern, dull and stereotyped acoustic absorbant 34 is not easy that aging, distortion anti-impact force by force, not easily adsorbs oil smoke, dust, can clean, Acceptable life is long, to the advantage of low-frequency signal processing and the shorter advantage of length.Therefore can improve the serviceable life of whole NVH semianechoic room test macro, and reduce maintenance cost.
Technical scheme of the present invention is disclosed as above by preferred embodiment.The change that those skilled in the art do when should recognize the scope and spirit of the present invention disclosed in the claim do not departed from appended by the present invention and retouching, within the protection domain all belonging to claim of the present invention.
Claims (10)
1. a NVH semianechoic room test macro, is characterized in that, described NVH semianechoic room test macro comprises:
Anechoic room, for accommodating tested equipment; Have testboard bay basis in described anechoic room, described tested equipment is fixed on described testboard bay basis, is provided with elastic damping between the foundation ground in described testboard bay basis and described anechoic room;
Between dynamometer machine, for accommodating testing apparatus, described testing apparatus comprises dynamometer machine, has dynamometer machine base plate between described dynamometer machine, described testing apparatus is fixed on described dynamometer machine base plate, is provided with elastic damping between the foundation ground between described dynamometer machine base plate and described dynamometer machine;
Sound arrester, described in ring cover, tested equipment is arranged, so that space between described anechoic room and described dynamometer machine is isolated and to be insulated against sound; Described sound-proof wall is equipped with the multiple coupling shafts connecting described testing apparatus and described tested equipment for axle, can carry out the described test of multiple test pattern respectively to sound insulation.
2. NVH semianechoic room test macro as claimed in claim 1, it is characterized in that, described anechoic room is rectangular shape, described sound arrester comprises the sound-proof wall of four sides of described anechoic room and the sound insulation roof identical with material with described sound-proof wall structure, described sound-proof wall comprises the exterior wall of side and the air blanketing between described interior wall and described exterior wall between the interior wall of described anechoic room side, described dynamometer machine, and described multiple coupling shaft is also all arranged with silencing plate.
3. NVH semianechoic room test macro as claimed in claim 2, it is characterized in that, three described sides in four sides of described anechoic room are equipped with coupling shaft, and coupling shaft conllinear described in wear in relative two sides two.
4. NVH semianechoic room test macro as claimed in claim 2, it is characterized in that, be sticked inside described interior wall dull and stereotyped acoustic absorbant, and be sticked outside described exterior wall Sound-proof material.
5. NVH semianechoic room test macro as claimed in claim 4, it is characterized in that, the thickness of described dull and stereotyped acoustic absorbant is 350 millimeters, the useful volume of installing the described anechoic room after described dull and stereotyped acoustic absorbant is 9 meters × 8 meters × 5 meters, the width of described air blanketing is 0.1 meter, is filled with glass silk flosssilk wadding in described air blanketing.
6. NVH semianechoic room test macro as claimed in claim 1, is characterized in that, pad and be provided with rubber washer to insulate against sound between described sound-proof wall and described coupling shaft.
7. NVH semianechoic room test macro as claimed in claim 1, it is characterized in that, the natural frequency of described elastic damping is less than or equal to 8hz, avoids described testing apparatus, described tested equipment, described testboard bay basis and the resonant frequency of described dynamometer machine base plate.
8. a NVH semianechoic room method of testing, is characterized in that, described NVH semianechoic room method of testing comprises step:
By tested equipment layout in anechoic room, tested equipment is fixed on the testboard bay basis of anechoic room, between the foundation ground in described testboard bay basis and described anechoic room, elastic damping is set to insulate against sound; The testing apparatus comprising dynamometer machine is fixed on the dynamometer machine base plate between dynamometer machine, elastic damping is set between the foundation ground between described dynamometer machine base plate and described dynamometer machine to insulate against sound;
With tested equipment described in sound arrester ring cover so that space between described anechoic room and described dynamometer machine is isolated and to be insulated against sound, what described sound-proof wall insulated against sound wears multiple coupling shaft;
Described testing apparatus is connected by one or more described coupling shaft axle with described tested equipment, carries out the described test of multiple test pattern respectively.
9. NVH semianechoic room method of testing as claimed in claim 8, it is characterized in that, described testing apparatus comprises the first dynamometer machine, second dynamometer machine and the 3rd dynamometer machine, can respectively by the first coupling shaft, second coupling shaft and the 3rd coupling shaft and described tested equipment connection, the rated power of described second dynamometer machine and described 3rd dynamometer machine, nominal torque is identical with revolution, the rated power of described second dynamometer machine is greater than the rated power of described first dynamometer machine, the nominal torque of described second dynamometer machine is greater than the nominal torque of described first dynamometer machine, the revolution of described second dynamometer machine is less than the revolution of described first dynamometer machine.
10. NVH semianechoic room method of testing as claimed in claim 9, is characterized in that, by following test pattern connecting test equipment and tested testing equipment:
First test pattern: testing apparatus is the first dynamometer machine, tested equipment is the first engine, and described first dynamometer machine is connected with described first engine shaft by the first coupling shaft;
Second test pattern: testing apparatus is the second dynamometer machine, tested equipment is the second engine that power is greater than described first engine, and described second dynamometer machine is connected with described second engine shaft by the first coupling shaft;
3rd test pattern: testing apparatus is the 3rd dynamometer machine of the second dynamometer machine and simulated machine, tested equipment is the first wheel box, described second dynamometer machine is connected with described first gear-box axle by the second coupling shaft, and described 3rd dynamometer machine is connected with described first gear-box axle by the 3rd coupling shaft;
4th test pattern: testing apparatus is the second dynamometer machine and the 3rd dynamometer machine, tested equipment is the combination of trimotor, the second wheel box and the first vehicle bridge, described second dynamometer machine is connected with described first axle shaft by the second coupling shaft, and described 3rd dynamometer machine is connected with described first axle shaft by the 3rd coupling shaft;
5th test pattern: testing apparatus is the first dynamometer machine of the second dynamometer machine, the 3rd dynamometer machine and simulated machine, tested equipment is the second vehicle bridge, described first dynamometer machine is connected with described second axle shaft by the first coupling shaft, described second dynamometer machine is connected with described second axle shaft by the second coupling shaft, and described 3rd dynamometer machine is connected with described second axle shaft by the 3rd coupling shaft;
6th test pattern: testing apparatus is the first dynamometer machine of the second dynamometer machine, the 3rd dynamometer machine and simulated machine, tested equipment is the combination of the 3rd wheel box and the 3rd vehicle bridge, described first dynamometer machine is connected with described 3rd gear-box axle by the first coupling shaft, described second dynamometer machine is connected with described 3rd axle shaft by the second coupling shaft, and described 3rd dynamometer machine is connected with described 3rd axle shaft by the 3rd coupling shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110265650.5A CN102998124B (en) | 2011-09-08 | 2011-09-08 | NVH (noise, vibration and harshness) semi-anechoic room test system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110265650.5A CN102998124B (en) | 2011-09-08 | 2011-09-08 | NVH (noise, vibration and harshness) semi-anechoic room test system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102998124A CN102998124A (en) | 2013-03-27 |
| CN102998124B true CN102998124B (en) | 2015-07-08 |
Family
ID=47926978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110265650.5A Active CN102998124B (en) | 2011-09-08 | 2011-09-08 | NVH (noise, vibration and harshness) semi-anechoic room test system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102998124B (en) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397712B (en) * | 2013-08-10 | 2015-06-17 | 厦门嘉达声学技术有限公司 | Anechoic room transmission shaft sound-insulating structure |
| CN103469992B (en) * | 2013-09-18 | 2016-04-06 | 苏州岸肯电子科技有限公司 | Semianechoic room launches ground entirely |
| CN104792519A (en) * | 2015-04-05 | 2015-07-22 | 重庆理工清研凌创测控科技有限公司 | Offline automobile gearbox NVH (noise, vibration and harshness) detecting method |
| CN104792406A (en) * | 2015-04-05 | 2015-07-22 | 重庆理工清研凌创测控科技有限公司 | NVH offline detecting device for car gearbox |
| CN104897396A (en) * | 2015-06-16 | 2015-09-09 | 陕西法士特齿轮有限责任公司 | Mechanical transmission loaded noise test stand and test method |
| CN105300706A (en) * | 2015-10-22 | 2016-02-03 | 华晨汽车集团控股有限公司 | NVH performance test method for automobile acoustic package |
| CN105486501B (en) * | 2015-12-01 | 2018-02-23 | 贵州大学 | A kind of method and device for measuring 4 wheel driven transfer case motor assembly noise |
| CN105784357B (en) * | 2016-04-29 | 2019-04-16 | 吉林大学 | Noise of automobile speed changer testing stand |
| CN107064795A (en) * | 2017-02-10 | 2017-08-18 | 南京越博动力系统股份有限公司 | A kind of mechanical back to back test testboard for anechoic room |
| CN107860581B (en) * | 2017-09-25 | 2020-07-07 | 南京航空航天大学 | Unbalanced vibration comprehensive test bed for modularized engine rotor |
| CN107860567A (en) * | 2017-10-23 | 2018-03-30 | 上汽通用汽车有限公司 | Automobile engine wheel train part noise fest platform |
| CN110823586A (en) * | 2018-08-07 | 2020-02-21 | 上汽通用汽车有限公司 | Complete vehicle abnormal sound laboratory |
| CN109000939A (en) * | 2018-08-28 | 2018-12-14 | 四川建安工业有限责任公司 | Vehicle bridge NVH testboard bay |
| AT521119B1 (en) * | 2018-09-25 | 2020-11-15 | Avl List Gmbh | Test set-up for acoustic testing of a test item at high speed |
| CN109738183B (en) * | 2019-01-24 | 2021-07-09 | 吉孚动力技术(中国)有限公司 | Knocking noise test method for gear transmission system of automobile power assembly |
| CN109655262A (en) * | 2019-01-24 | 2019-04-19 | 吉孚动力技术(中国)有限公司 | The gear train assembly beat noise test equipment of automobile power assembly |
| CN110469148A (en) * | 2019-08-06 | 2019-11-19 | 中汽研（天津）汽车工程研究院有限公司 | A kind of acoustical laboratory for vehicle driveline vibration and noise test |
| CN110426198A (en) * | 2019-08-06 | 2019-11-08 | 中汽研（天津）汽车工程研究院有限公司 | A kind of vehicle drive-train NVH test macro |
| CN111207942A (en) * | 2020-02-27 | 2020-05-29 | 重庆大学 | NVH rack test system of air condition compressor |
| CN112197976B (en) * | 2020-09-04 | 2022-11-11 | 中国第一汽车股份有限公司 | Four-channel road simulation test platform for NVH (noise, vibration and harshness) test |
| CN112461552B (en) * | 2020-11-16 | 2023-09-26 | 上海拿森汽车电子有限公司 | Detection method and system of electronic power-assisted braking system and readable storage medium |
| CN112485002B (en) * | 2020-11-17 | 2022-02-01 | 奇瑞汽车股份有限公司 | Rack construction method, rack and test method for testing NVH (noise, vibration and harshness) of power assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3425488B2 (en) * | 1995-03-24 | 2003-07-14 | 日産自動車株式会社 | Internal combustion engine test equipment |
| CN2585214Y (en) * | 2002-09-07 | 2003-11-05 | 陈飞龙 | Box equipment of engine testing stage |
| CN2924509Y (en) * | 2006-05-26 | 2007-07-18 | 广西玉柴机器股份有限公司 | Engine test bench for anechoic chamber |
| CN201096516Y (en) * | 2007-08-28 | 2008-08-06 | 重庆汽车研究所 | Automobile dynamic steering oil pump noise on-line detection bench isolation booth |
| CN201600185U (en) * | 2009-11-30 | 2010-10-06 | 北汽福田汽车股份有限公司 | Noise reduction chamber |
-
2011
- 2011-09-08 CN CN201110265650.5A patent/CN102998124B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3425488B2 (en) * | 1995-03-24 | 2003-07-14 | 日産自動車株式会社 | Internal combustion engine test equipment |
| CN2585214Y (en) * | 2002-09-07 | 2003-11-05 | 陈飞龙 | Box equipment of engine testing stage |
| CN2924509Y (en) * | 2006-05-26 | 2007-07-18 | 广西玉柴机器股份有限公司 | Engine test bench for anechoic chamber |
| CN201096516Y (en) * | 2007-08-28 | 2008-08-06 | 重庆汽车研究所 | Automobile dynamic steering oil pump noise on-line detection bench isolation booth |
| CN201600185U (en) * | 2009-11-30 | 2010-10-06 | 北汽福田汽车股份有限公司 | Noise reduction chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102998124A (en) | 2013-03-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102998124B (en) | NVH (noise, vibration and harshness) semi-anechoic room test system and method | |
| CN103712797B (en) | A kind of experimental provision of simulating aeroplane engine machine bolt terminal pad drum type rotor | |
| CN104897396A (en) | Mechanical transmission loaded noise test stand and test method | |
| CN204740066U (en) | Mechanical transmission loading noise level test rack | |
| CN202202579U (en) | Whole-vehicle semi-anechoic room arc roof construction structure of a vehicle noise test room | |
| CN110469148A (en) | A kind of acoustical laboratory for vehicle driveline vibration and noise test | |
| CN104405151A (en) | Noise control method for air blower machine room | |
| CN203444751U (en) | Ball mill roller damping composite sound absorption and insulation device | |
| CN206095552U (en) | Test of arc spring rigidity and endurance test device | |
| CN202141522U (en) | Power assembly test room with silencing and sound-insulating system | |
| CN209182022U (en) | The gear train assembly beat noise test equipment of automobile power assembly | |
| CN210198641U (en) | Noise-reduction dynamic balancing machine | |
| CN209181912U (en) | New-energy automobile electric drive assembly noise test equipment | |
| CN109655262A (en) | The gear train assembly beat noise test equipment of automobile power assembly | |
| CN110426198A (en) | A kind of vehicle drive-train NVH test macro | |
| CN205898973U (en) | Motor testboard frame for electric automobile | |
| Dong et al. | Uncertainty analysis of high-frequency noise in battery electric vehicle based on interval model | |
| CN212506839U (en) | Spring resonance noise reduction device | |
| CN212988795U (en) | Engine vibration noise test system | |
| CN110967172A (en) | Silencing box and system for vibration noise test of power device | |
| CN204855158U (en) | Engine and whole test device of gearbox | |
| RU189172U1 (en) | Device for assessing the level of gas-dynamic noise of the exhaust system of engines of wheeled vehicles | |
| RU43070U1 (en) | ACOUSTIC MOTOR STAND FOR RESEARCH AND FINISHING WORKS TO MUTE THE NOISE OF THE INLET OF THE INLET OF THE INTERNAL COMBUSTION ENGINE | |
| CN218843868U (en) | Effectual test room gives sound insulation | |
| CN109738183B (en) | Knocking noise test method for gear transmission system of automobile power assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |