CN215770498U - Vehicle resonance system and vehicle - Google Patents
Vehicle resonance system and vehicle Download PDFInfo
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- CN215770498U CN215770498U CN202122054227.2U CN202122054227U CN215770498U CN 215770498 U CN215770498 U CN 215770498U CN 202122054227 U CN202122054227 U CN 202122054227U CN 215770498 U CN215770498 U CN 215770498U
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Abstract
The utility model relates to a vehicle resonance system and vehicle, vehicle resonance system include the passenger cabin and the resonant cavity of vehicle, wherein, the resonant cavity is the confined cavity that sets up in the passenger cabin to be linked together through opening and passenger cabin, so that the first sound cavity that the passenger cabin formed and the second sound cavity coupling resonance that the resonant cavity formed. Therefore, the resonant cavity is added in the passenger compartment to adjust the resonant frequency of the resonant cavity and the passenger compartment, and the sound pressure amplitude of the sound cavity in the vehicle is reduced. Meanwhile, the resonant cavity is communicated with the passenger cabin through the designed opening, the coupling relation between the resonant cavity space and the passenger cabin is utilized, the purpose of effectively adjusting the vibration absorption frequency of the resonant cavity can be achieved, the noise in the vehicle is reduced only by utilizing the existing structural design of the vehicle, the driving experience and the comfort level of the whole vehicle are improved, and the operation is simple and the cost is low.
Description
Technical Field
The present disclosure relates to the field of vehicle noise reduction technology, and in particular, to a vehicle resonance system and a vehicle.
Background
When a sound cavity mode (a mode formed by closed air is called a sound cavity mode) in the vehicle is excited by a metal plate, the problems of sound generation and ear pressing in the vehicle can be caused, so that the subjective feeling of passengers in the vehicle is obviously deteriorated, and the driving and riding experience is influenced. The mode of the sound cavity in the vehicle is directly related to the size of the vehicle body, and the mode of the sound cavity is not easy to change after the size of the vehicle body is determined. In the correlation technique, through designing an automobile-used sound chamber, the accessible changes the cavity internal resonant cavity volume and realizes that resonant frequency is adjustable, and application scope is wide, repeatedly usable, but this automobile-used sound chamber need install in the car top, can influence car inner space and molding, and need make alone, and is with high costs, the structure is complicated.
SUMMERY OF THE UTILITY MODEL
It is an object of the present disclosure to provide a vehicle resonance system and a vehicle to at least partially solve the related problems existing in the prior art.
In order to achieve the above object, the present disclosure provides a vehicle resonance system including a passenger compartment and a resonance cavity of a vehicle, wherein the resonance cavity is a closed cavity disposed in the passenger compartment and is communicated with the passenger compartment through an opening, so that a first acoustic cavity formed by the passenger compartment and a second acoustic cavity formed by the resonance cavity are coupled and resonated.
Optionally, the resonant cavity is a trunk room disposed in the passenger cabin, the trunk room and the passenger cabin share the same bottom wall and the vehicle body side enclosing plates on two sides, and are separately disposed through a trunk rack plate and a vertical plate butted with the trunk rack plate, and the opening is formed on the vertical plate and/or the trunk rack plate.
Optionally, at least one row of seats is arranged in the passenger compartment, and the trunk storage plate is located below the last row of seats and encloses the trunk compartment together with the vertical plate, the side body panels on two sides, and the rear door of the vehicle.
Optionally, the opening is formed on the vertical plate and extends in the width direction of the vehicle, and the opening is located at an upper edge of the vertical plate, which is abutted against the trunk shelf, or a lower edge of the vertical plate, which is abutted against the bottom wall.
Optionally, the opening is formed on the trunk deck and extends in a vehicle width direction.
Alternatively, the opening is formed in a long-bar shape extending in the vehicle width direction, and the size in the vehicle height direction is 90mm to 95 mm.
Optionally, the volume ratio of the second acoustic cavity to the first acoustic cavity is 1: (9-10).
Optionally, the peak range of the acoustic cavity frequency of the first acoustic cavity is between 45Hz and 70Hz, and the acoustic cavity amplitude is less than 110 dB.
Optionally, the resonant cavity is a closed cavity defined by a rigid outer wall, and the resonant cavity is an inner cavity defined by a front instrument panel and a vehicle body sheet metal.
According to still another aspect of the present disclosure, there is also provided a vehicle including the vehicle resonance system described above.
Through the technical scheme, the resonant cavity is additionally arranged in the passenger cabin to adjust the resonant frequency of the resonant cavity and the passenger cabin, and the sound pressure amplitude of the sound cavity in the vehicle is reduced. Meanwhile, the resonant cavity is communicated with the passenger cabin through the designed opening, the coupling relation between the resonant cavity space and the passenger cabin is utilized, the purpose of effectively adjusting the vibration absorption frequency of the resonant cavity can be achieved, the noise in the vehicle is reduced only by utilizing the existing structural design of the vehicle, the driving experience and the comfort level of the whole vehicle are improved, and the operation is simple and the cost is low.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic view of a passenger compartment and a luggage compartment in a vehicle resonance system according to one embodiment of the present disclosure.
FIG. 2 is a schematic illustration of the location of an opening in a vehicle resonator system according to one embodiment of the present disclosure.
Fig. 3 is a graphical illustration of experimental acoustic pressure response results and calibration results according to one embodiment of the present disclosure.
Description of the reference numerals
1-passenger compartment; 2-a resonant cavity; 21-standing a plate; 22-luggage rack; 23-opening.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, the use of directional terms such as "inner" and "outer" is defined with respect to the intrinsic contours of the respective components, unless otherwise specified. The terms "front" and "rear" refer to the traveling direction of the vehicle, and the left side in the drawing direction in fig. 2 is "front" and the right side in the drawing direction is "rear". The use of the terms first, second, etc. are used for distinguishing between different components and not necessarily for describing a sequential or chronological order. Furthermore, in the following description, when referring to the figures, the same reference numbers in different figures denote the same or similar elements, unless otherwise explained.
According to an embodiment of the present disclosure, a vehicle resonance system is provided, as shown in fig. 1 and 2, which may include a passenger compartment 1 and a resonance cavity 2 of a vehicle, wherein the resonance cavity 2 is a closed cavity disposed in the passenger compartment 1 and is communicated with the passenger compartment 1 through an opening 23, so that a first acoustic cavity formed by the passenger compartment 1 and a second acoustic cavity formed by the resonance cavity 2 are coupled and resonated. It should be noted that the resonant cavity 2 may be a closed cavity existing in the passenger compartment 1 of the vehicle, and may be an inner cavity enclosed by a luggage compartment, a front instrument panel and a sheet metal body, or other closed cavity enclosed by a rigid outer wall, which all belong to the protection scope of the present disclosure, and the embodiment in which the resonant cavity 2 is designed as a luggage compartment will be described in detail hereinafter. In addition, it should be noted that harmonicsThe cavity 2 is similar to a dynamic vibration absorber and can be considered as a spring-mass system, and the frequency of the cavity 2 can be derived from the following equation: frequency of the resonant cavity:
wherein c is the sound velocity, A is the opening area, t is the opening depth, V is the cavity volume of the resonant cavity, and d is the opening diameter.
Referring to fig. 3 for the change of the mode of the sound cavity in the vehicle after the resonant cavity 2 is added in the passenger compartment 1, as shown by the solid line in fig. 3, the mode is the mode of the sound cavity of the enclosed air in the passenger compartment without the luggage compartment, the first-order sound pressure response peak value is the longitudinal first-order mode appearing at about 50Hz, and the mode is the first-order mode with the largest sound cavity energy, which is most prone to noise problems; after the luggage compartment is additionally arranged, as shown by a dotted line in fig. 3, the peak range of the sound cavity frequency of the first sound cavity can be between 45Hz and 70Hz, and the amplitude of the sound cavity is less than 115dB-Pa/m3/s2That is, the sound cavity of the luggage compartment decomposes the first sound pressure response peak value in the passenger compartment 1 into two peak values, but the amplitudes of the decomposed two peak values are both lower than the original amplitudes, and the decomposed two frequencies are on both sides of the original peak value frequency, so that the overall noise level of the passenger compartment 1 is reduced after the passenger compartment sound cavity is coupled with the luggage compartment sound cavity. The noise of the passenger compartment 1 can be effectively reduced by reasonably designing the size and the position of the opening 23, and the passenger compartment has important guiding significance for actual vehicle body development. Meanwhile, in order to eliminate the influence of structural members on the sound cavity, the side plates 21 and the trunk deck 22 as well as the side walls and the bottom wall of the passenger compartment 1 may be made of non-sound-absorbing materials, so that the test result is more accurate.
Through the technical scheme, the resonant cavity 2 is added in the passenger cabin 1 to adjust the resonant frequency of the resonant cavity 2 and the passenger cabin 1, and the sound pressure amplitude of the sound cavity in the vehicle is reduced. Meanwhile, the resonant cavity 2 is communicated with the passenger cabin 1 through the design opening 23, and the coupling relation between the space of the resonant cavity 2 and the passenger cabin 1 is utilized, so that the purpose of effectively adjusting the vibration absorption frequency of the resonant cavity can be achieved, the noise in the vehicle is reduced only by utilizing the existing structural design of the vehicle, the driving experience and the comfort level of the whole vehicle are improved, the operation is simple, and the cost is low.
For the embodiment that the resonant cavity 2 is designed as a trunk, as shown in fig. 1 and fig. 2, the resonant cavity 2 may be a closed cavity surrounded by rigid outer walls, the trunk and the passenger compartment 1 share the same bottom wall and the side enclosing plates of the vehicle body on both sides, and are separated by the trunk rack 22 and the upright plate 21 abutting against the trunk rack 22, and the opening 23 is formed on the upright plate 21 or the trunk rack 22, or may be formed on both the upright plate 21 and the trunk rack 22. The resonant cavity 2 is designed by utilizing the space of the conventional luggage compartment, the space in a vehicle cannot be occupied, the space is fully utilized, and meanwhile, the resonant cavity 2 is the luggage compartment, so that the size is large enough, the energy loss is large, and the sound pressure response can be effectively reduced.
Further, at least one row of seats can be arranged in the passenger compartment 1, and the trunk storage plate 22 is located below the last row of seats and encloses a luggage compartment together with the vertical plate 21, the side wall plates of the vehicle body at two sides of the passenger compartment 1 and the rear door of the vehicle. The resonant cavity 2 replaces the function of a luggage compartment and is positioned at the rear part, the switch is convenient, other spaces are not occupied, and meanwhile, the resonant cavity and the inside of the vehicle share a vehicle door and a vehicle body side wall plate, so that the material is saved. In addition, it is within the scope of the present disclosure for the luggage compartment door to be open in other directions, such as sideways.
In order to determine the influence of the difference in position and size of the opening 23 on the sound pressure, and to obtain a result closer to the actual situation, finite element simulation analysis is performed, and the sound source is used to excite the front of the passenger compartment 1, so as to obtain the sound pressure responses at 63 uniformly distributed positions inside the passenger compartment 1, and the noise situation in the whole passenger compartment 1 can be sufficiently reflected, and the position of the opening 23, the size and the shape of the opening 23 will be described below.
According to an embodiment of the present disclosure, the opening 23 may be formed as an elongated opening extending in the vehicle width direction, and the influence of the size in the vehicle height direction on the sound pressure response in the passenger compartment 1 is different, and the opening 23 height size is tested several times within 40mm to 160mm, and when it is found through finite element simulation analysis that the amplitude of the first peak is gradually larger and the amplitude of the second peak is gradually smaller as the size increases, it is shown from experimental data that the overall peak is reduced when the size of the opening 23 ranges from 90mm to 95mm, and more preferably, the overall peak is minimum when the size ranges from 90mm to 95 mm.
According to an embodiment of the present disclosure, as shown in fig. 2, the opening 23 may be formed on the vertical plate 21 and extend in the width direction of the vehicle, the opening 23 may be located at an upper edge of the vertical plate 21 abutting against the trunk deck 22 or a lower edge of the vertical plate 21 abutting against the bottom wall, and the opening 23 may also be formed on the trunk deck 22 and extend in the width direction of the vehicle. The position of the opening 23 may be any one of the three positions, or two or three positions of the three positions may exist at the same time, which is not limited in this disclosure, in the comparative analysis performed on the position of the opening 23 through the early finite element simulation, when the opening 23 is located at the lower edge position of the vertical plate 21, which is in contact with the bottom wall, the amplitudes of the two decomposed peaks are closest to both sides of the original peak frequency, and the amplitudes of the two peaks are close to each other, and when the amplitudes of the first peak and the second peak are substantially equal, the sound pressure response in the passenger compartment is minimal, according to the experimental situation, the lower edge position of the opening 23, which is in contact with the bottom wall, of the vertical plate 21 is the best position.
According to an embodiment of the present disclosure, a volume ratio of the second acoustic cavity to the first acoustic cavity may range from 1: (9-10), which is not limited by the present disclosure. The passenger compartment 1 designed in the simulation experiment has the size of 3270mm multiplied by 1360mm multiplied by 1178mm and the volume of 4.14 multiplied by 109mm3(ii) a The size of the resonant cavity 2 is 800mm multiplied by 1260mm multiplied by 439mm, and the volume is 4.4 multiplied by 108mm3The luggage shelf 22 may be 30mm thick. The sizes of the passenger compartment 1 and the resonant cavity 2 are close to those of a real vehicle, so that the real condition of the real vehicle can be reflected better.
According to another embodiment of the present disclosure, the position of the resonant cavity 2 can also be an inner cavity enclosed by a front instrument panel and a vehicle body metal plate, and meanwhile, the closed cavity enclosed by the rigid outer wall limits the position and the size of the opening communicating the front instrument panel and the vehicle body metal plate, so that the vibration absorption frequency of the resonant cavity 2 is adjusted, the noise in the vehicle is reduced, and the driving experience and the comfort level of the whole vehicle are improved.
On the basis of the scheme, the vehicle comprises the vehicle resonance system, and the vehicle has all the beneficial effects of the vehicle resonance system, and the description is omitted.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A vehicle resonance system is characterized by comprising a passenger compartment (1) and a resonance cavity (2) of a vehicle, wherein the resonance cavity (2) is a closed cavity arranged in the passenger compartment (1) and communicated with the passenger compartment (1) through an opening (23) so that a first sound cavity formed by the passenger compartment (1) and a second sound cavity formed by the resonance cavity (2) are coupled and resonated.
2. The vehicle resonance system according to claim 1, wherein the resonance chamber (2) is a luggage compartment disposed in the passenger compartment (1), the luggage compartment and the passenger compartment (1) share a same bottom wall and two side vehicle body side enclosing plates, and are separated by a luggage rack (22) and a vertical plate (21) abutting against the luggage rack (22), and the opening (23) is formed on the vertical plate (21) and/or the luggage rack (22).
3. The vehicle resonance system according to claim 2, wherein at least one row of seats is arranged in the passenger compartment (1), and the trunk shelf (22) is located below the rearmost row of seats and encloses the trunk compartment (2) together with the riser (21), the body side panels on both sides, and the rear door of the vehicle.
4. The vehicle resonance system according to claim 2, wherein the opening (23) is formed on the upright (21) and extends in the vehicle width direction, the opening (23) being located at an upper edge of the upright (21) that interfaces with the trunk deck (22) or a lower edge that interfaces with the bottom wall.
5. The vehicle resonance system according to claim 2, wherein the opening (23) is formed on the trunk deck (22) and extends in a vehicle width direction.
6. The vehicular resonance system according to claim 2, wherein the opening (23) is formed in an elongated structure extending in the vehicle width direction, and has a dimension in the vehicle height direction of 90mm to 95 mm.
7. The vehicle resonator system of claim 1, characterized in that the volume ratio of the second acoustic cavity to the first acoustic cavity is 1: (9-10).
8. The vehicle resonator system of claim 1, wherein the first acoustic cavity has an acoustic cavity frequency peak in a range of 45Hz to 70Hz and an acoustic cavity amplitude of less than 110 dB.
9. The vehicle resonance system according to claim 1, wherein the resonant cavity (2) is a closed cavity surrounded by rigid outer walls, and the resonant cavity (2) is an inner cavity surrounded by a front dashboard and a vehicle body sheet metal.
10. A vehicle comprising a vehicle resonance system according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122054227.2U CN215770498U (en) | 2021-08-27 | 2021-08-27 | Vehicle resonance system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122054227.2U CN215770498U (en) | 2021-08-27 | 2021-08-27 | Vehicle resonance system and vehicle |
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| Publication Number | Publication Date |
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| CN215770498U true CN215770498U (en) | 2022-02-08 |
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| CN202122054227.2U Active CN215770498U (en) | 2021-08-27 | 2021-08-27 | Vehicle resonance system and vehicle |
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- 2021-08-27 CN CN202122054227.2U patent/CN215770498U/en active Active
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