Device for benchmarking with vehicle component performance simulation tests

Abstract

The present disclosure relates to a device for benchmarking with vehicle component performance test simulation, including a box, a microphone, a vibrator and a vibration response detector. A chamber is formed inside the box, an opening connected to the chamber is provided on the box, the microphone is installed in the chamber, the vibrator is used to cover the opening so that the chamber forms a sealed chamber, and is used to vibrate to radiate sound pressure signals and vibration signals to the inside of the box, the microphone is used to obtain the sound pressure response generated by the sound pressure signal in the chamber, and the vibration response detector is used to obtain the vibration response generated by the vibration signal on the vibrator. The sound pressure response and vibration response are used to benchmark with the same parameters simulated by the simulation model established based on the device. By benchmarking the actual results obtained by testing the device with the simulation results calculated by the simulation model, the shortcomings of the simulation model can be found, and the modeling method of the simulation model and the coupling method with the vehicle can be optimized to improve the accuracy of the simulation model.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vibration and noise testing of vehicle parts, and in particular, to a device for benchmarking with vehicle parts performance simulation testing. Background Art

[0002] For vehicles, especially passenger cars, interior materials have a huge impact on the NVH performance of the vehicle. However, the current finite element method simulation modeling and coupling of interior materials have not been benchmarked, resulting in low accuracy of the simulation model test results. The interior materials selected by simulation modeling cannot meet the vehicle's NVH performance requirements, affecting the forward development of the entire vehicle. Summary of the invention

[0003] The purpose of the present disclosure is to provide a device for benchmarking with vehicle component performance simulation tests, which is conducive to determining high-precision simulation modeling and coupling methods for vehicle components by establishing a simple physical model and simulation benchmarking.

[0004] In order to achieve the above-mentioned purpose, the present disclosure provides a device for benchmarking with a vehicle component performance simulation test, comprising a box, a microphone, a vibrator and a vibration response detector, wherein a chamber is formed inside the box, an opening connected to the chamber is provided on the box, the microphone is installed in the chamber, the vibrator is used to cover the opening so that the chamber forms a sealed chamber, and the vibrator is used to vibrate to radiate sound pressure signals and vibration signals to the inside of the box, the microphone is used to obtain the sound pressure response generated by the sound pressure signal in the chamber, and the vibration response detector is used to obtain the vibration response generated by the vibration signal on the vibrator, wherein the sound pressure response and the vibration response are used to benchmark with the sound pressure response and the vibration response simulated by a simulation model established based on the device.

[0005] Optionally, the device also includes a sound absorbing material piece, which is arranged on the bottom surface of the chamber. The microphone is also used to obtain the sound pressure response in the chamber after the sound absorbing material piece is set, and the vibration response detector is also used to obtain the vibration response on the vibration piece after the sound absorbing material piece is set.

[0006] Optionally, the device also includes a sound insulation material piece, which is used to be arranged on the side of the vibration piece facing the chamber, and the microphone is also used to obtain the sound pressure response in the chamber after the sound absorbing material piece and the sound insulation material piece are set, and the vibration response detector is also used to obtain the vibration response on the vibration piece after the sound absorbing material piece and the sound insulation material piece are set.

[0007] Optionally, the device also includes a first clamping member, a second clamping member and a fastener, the thickness of the first clamping member and the second clamping member is greater than the thickness of the vibrating member, the first clamping member and the second clamping member are respectively pressed against the upper surface and the lower surface of the vibrating member, the first clamping member, the vibrating member and the second clamping member are respectively provided with a first mounting hole, a second mounting hole and a third mounting hole, one end of the fastener passes through the first mounting hole, the second mounting hole and the third mounting hole in sequence, and is fixed to the box body.

[0008] Optionally, the device further comprises a mounting bracket and a mounting support, wherein the mounting bracket is used to mount the microphone, and the mounting support is used to fix the mounting bracket to the inner wall of the box, and the mounting bracket is a mesh structure.

[0009] Optionally, there are multiple microphones, and the multiple microphones are arranged on the mounting bracket at intervals.

[0010] Optionally, the sound absorbing material piece is arranged on the bottom surface of the chamber, and there are multiple mounting brackets, which are arranged at intervals in the height direction of the box.

[0011] Optionally, a positioning column is further provided on the mounting support, and the positioning column is used to be plugged and positioned with a plug-in portion on the mounting bracket during the installation process of the mounting bracket and the mounting support.

[0012] Optionally, the opening is located on the top side of the box body, the opening is a square opening, and the side length of the opening is 300mm-500mm.

[0013] Optionally, the box body includes a bottom plate, a top plate, and four side plates connected between the bottom plate and the top plate. The cross section of the box body is rectangular, and the opening is arranged on the top plate.

[0014] Optionally, the apparatus further comprises a digital acquisition device and a force hammer, wherein the force hammer is used to excite the vibration member to vibrate, and the force hammer, the vibration response detector and the microphone are electrically connected to the digital acquisition device respectively.

[0015] In the present disclosure, by comparing the actual results obtained by testing the device with the simulation results calculated by the simulation model, the deficiencies of the simulation model are found and the simulation model is corrected, so that the modeling method of the simulation model and the coupling method with the vehicle can be optimized, the accuracy of the simulation model can be improved, and the calculation results of the simulation model can be closer to the actual situation. In addition, using this optimized simulation model, various vehicle components with sound absorption and sound insulation performance requirements can be tested, which can save development costs, help meet vehicle NVH requirements, and promote the positive development of vehicle NVH.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of a device for benchmarking vehicle component performance simulation test provided by one embodiment of the present disclosure;

[0019] Figure 2 is a cross-sectional schematic diagram of a device for benchmarking vehicle component performance simulation test provided by one embodiment of the present disclosure;

[0020] Figure 3 is a schematic diagram of a vibrating member and a clamping member in an assembled state provided by an embodiment of the present disclosure;

[0021] Figure 4 is a schematic diagram of the arrangement position of a microphone on a mounting bracket provided in one embodiment of the present disclosure;

[0022] Figure 5 is a schematic diagram of a three-dimensional structure of a device for benchmarking vehicle component performance simulation test provided by an embodiment of the present disclosure, wherein a vibrating member and one of the side panels of the box body are not shown;

[0023] Figure 6 yes Figure 5 A magnified schematic diagram of part A;

[0024] Figure 7 It is a bottom view schematic diagram of a device for simulating and benchmarking the sound absorption and insulation performance of passenger car interior materials provided by an embodiment of the present disclosure;

[0025] Figure 8 is a schematic diagram for comparing VTF-RMS values ​​measured when the device and the simulation model are not provided with acoustic material pieces, provided by an embodiment of the present disclosure;

[0026] Fig. 9 is a comparative schematic diagram of NTF-RMS values ​​measured when the device and the simulation model are not provided with acoustic material pieces, provided by an embodiment of the present disclosure;

[0027] Fig.10 It is a comparative schematic diagram of VTF-RMS values ​​measured when the device provided by an embodiment of the present disclosure is not provided with an acoustic material piece, the device is provided with a PU piece, and the simulation model is provided with a PU piece;

[0028] Fig.11 It is a comparative schematic diagram of NTF-RMS values ​​measured when the device provided by an embodiment of the present disclosure is not provided with an acoustic material piece, the device is provided with a PU piece, and the simulation model is provided with a PU piece;

[0029] Fig.12 It is a comparative schematic diagram of VTF-RMS values ​​measured when the device provided by an embodiment of the present disclosure is provided with a PU part, the device provided with a PU part and an EVA part at the same time, and the simulation model provided with a PU part and an EVA part at the same time;

[0030] Fig.13 It is a comparative schematic diagram of NTF-RMS values ​​measured when the device provided by an embodiment of the present disclosure is provided with a PU part, the device provided with a PU part and an EVA part at the same time, and the simulation model provided with a PU part and an EVA part at the same time;

[0031] Fig.14 It is a schematic diagram for comparing the VTF-RMS values ​​measured when the device provided by an embodiment of the present disclosure is provided with a PU part and an EVA part at the same time, the simulation model of the present solution is provided with a PU part and an EVA part at the same time, and the existing simulation solution is provided with a PU part and an EVA part at the same time;

[0032] Fig.15 It is a schematic diagram for comparing the NTF-RMS values ​​measured when the device provided by an embodiment of the present disclosure is provided with a PU part and an EVA part at the same time, the simulation model of the present scheme is provided with a PU part and an EVA part at the same time, and the existing simulation scheme is provided with a PU part and an EVA part at the same time.

[0033] Description of Reference Numerals

[0034] 1-box body; 11-chamber; 12-opening; 13-bottom plate; 14-top plate; 15-side plate; 16-wiring hole; 2-microphone; 3-vibrating member; 31-second mounting hole; 4-sound-absorbing material member; 5-sound-insulating material member; 6-first clamping member; 61-first mounting hole; 7-second clamping member; 71-third mounting hole; 9-mounting bracket; 10-mounting support; 110-castor. DETAILED DESCRIPTION

[0035] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0036] In the present disclosure, unless otherwise specified, directional terms such as "upper, lower, left, right" are generally defined based on the drawing direction of the corresponding drawings. "Inside and outside" refer to the inside and outside of the contour of the corresponding component.

[0037] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0038] like Figures 1 to 7 The present disclosure provides a device for benchmarking with a vehicle component performance simulation test, the device includes a box 1, a microphone 2, a vibrator 3 and a vibration response detector, a chamber 11 is formed inside the box 1, an opening 12 connected to the chamber 11 is provided on the box 1, the microphone 2 is installed in the chamber 11, the vibrator 3 is used to cover the opening 12 so that the chamber 11 forms a sealed chamber, and the vibrator 3 is used to vibrate to radiate sound pressure signals and vibration signals to the inside of the box 1, the microphone 2 is used to obtain the sound pressure response generated by the sound pressure signal in the chamber 11, and the vibration response detector is used to obtain the vibration response generated by the vibration signal on the vibrator 3, wherein the sound pressure response and the vibration response are used to benchmark with the sound pressure response and the vibration response simulated by the simulation model established based on the device.

[0039] It is understandable that in the present disclosure, when the device and the simulation model are benchmarked against various corresponding responses, the structure of the simulation model can be ensured to be basically the same as that of the device, and the operation steps for obtaining information are basically the same, so as to ensure the reliability of the benchmarking. For example, when benchmarking against the first vibration response, the structure of the simulation model is the same as that of the device, and the magnitude and excitation point of the excitation applied to the vibration member 3 are the same.

[0040] In the present disclosure, by comparing the actual results obtained by testing the device with the simulation results calculated by the simulation model, the deficiencies of the simulation model are found and the simulation model is corrected, so that the modeling method of the simulation model and the coupling method with the vehicle can be optimized, the accuracy of the simulation model can be improved, and the calculation results of the simulation model can be closer to the actual situation. In addition, using this optimized simulation model, various vehicle components with sound absorption and sound insulation performance requirements can be tested, which can save development costs, help meet vehicle NVH requirements, and promote the positive development of vehicle NVH.

[0041] In addition, the device has a simple structure, which is conducive to establishing a simulation model with the same structure as the device, thereby facilitating improving the simulation accuracy of the simulation model.

[0042] The sound pressure response may be a specific value of the sound pressure, and the vibration response may be a velocity response, an acceleration response or a displacement response. Optionally, the vibration response detector may be a vibration acceleration sensor.

[0043] When testing, you can choose to place acoustic material pieces inside the box 1, such as Figure 2 The sound absorbing material piece or the sound insulating material piece shown in the figure may also be selected not to place the acoustic material piece inside the box body 1.

[0044] Optionally, as an embodiment of the present disclosure, Figure 2 As shown, the device may further include a sound absorbing material piece 4, which is arranged on the bottom surface of the chamber 11, for example, bonded to the bottom surface of the chamber, and the microphone 2 is further used to obtain the sound pressure response in the chamber 11 after the sound absorbing material piece 4 is provided, and the vibration response detector is further used to obtain the vibration response on the vibrating member 3 after the sound absorbing material piece 4 is provided. In this way, it can be seen that the sound pressure response and vibration response obtained after the sound absorbing material piece 4 is provided are used to compare with the sound pressure response and vibration response simulated by the simulation model after the sound absorbing material piece 4 is also provided.

[0045] The sound absorbing material piece 4 is arranged on the bottom surface of the chamber to facilitate the installation of the sound absorbing material piece 4. By obtaining the sound pressure response and vibration response after the sound absorbing material piece 4 is set, more data on the sound absorption and sound insulation performance of the device can be obtained, and more data on the sound pressure response and vibration response can be compared with the simulation results of the simulation model, which is conducive to further optimizing the accuracy of the simulation model.

[0046] Optionally, as an embodiment of the present disclosure, Figure 2 As shown, the device may also include a sound insulation material piece 5, which is used to be arranged on the side of the vibration piece 3 facing the chamber 11, for example, bonded to the vibration piece 3, and the microphone 2 is also used to obtain the sound pressure response in the chamber 11 after the sound absorbing material piece 4 and the sound insulation material piece 5 are provided, and the vibration response detector is also used to obtain the vibration response on the vibration piece 3 after the sound absorbing material piece 4 and the sound insulation material piece 5 are provided.

[0047] The purpose of arranging the sound insulation material piece 5 on the side of the vibration piece 3 facing the chamber 11 is to simulate the sound insulation effect of the vehicle interior on the external noise of the vehicle. Similarly, by setting the sound insulation material piece 5, more sound insulation data about the vehicle environment constructed by the device can be obtained. For example, the sound pressure response and vibration response in an application scenario where both the sound-absorbing material piece 4 and the sound insulation material piece 5 are provided and are closer to the internal environment of the vehicle can be obtained, which can be compared with the simulation results of the simulation model, which is conducive to further optimizing the accuracy of the simulation model.

[0048] Among them, the sound-absorbing material piece 4 is generally made of PU polyurethane material, and the sound-insulating material piece 5 is generally made of EVA plus polyurethane. This choice is also to be as close to the actual situation as possible. If there are other materials that can achieve the same purpose, they can also be used, and the present disclosure does not limit this.

[0049] Optionally, as an embodiment of the present disclosure, Figure 2 and Figure 3As shown, the above device may also include a first clamping member 6, a second clamping member 7 and a fastener (not shown), the thickness of the first clamping member 6 and the second clamping member 7 is greater than the thickness of the vibrating member 3, the first clamping member 6 and the second clamping member 7 are pressed against the upper surface and the lower surface of the vibrating member 3 respectively, the first clamping member 6, the vibrating member 3 and the second clamping member 7 are sequentially provided with a first mounting hole 61, a second mounting hole 31 and a third mounting hole 71, one end of the fastener passes through the first mounting hole 61, the second mounting hole 31 and the third mounting hole 71 in sequence, and is fixed on the box body 1. Since the vibrating member 3 is a thin plate member and needs to vibrate during the use of the device, the clamping member is arranged around the vibrating member 3 to ensure the normal use of the vibrating member 3. In addition, during the use of the above device, the vibrating member 3 needs to be assembled multiple times. By arranging the clamping member, the deformation of the vibrating member 3 during the multiple assembly processes can be avoided, and the edge of the vibrating member 3 is ensured not to curl, which is conducive to improving the accuracy of the test results.

[0050] The present disclosure does not limit the specific material and shape of the first clamping member 6 and the second clamping member 7. Optionally, the first clamping member 6 and the second clamping member 7 can both be long aluminum bars with a cross-section of 20*10 mm. The aluminum bars have sufficient rigidity and are relatively light.

[0051] In addition, the fasteners may be bolts, and there may be multiple fasteners to ensure the consistency of the boundary conditions of the vibration member 3.

[0052] As an embodiment of the present disclosure, in order to better simulate the internal environment of the vehicle, the vibration member 3 can choose to use a steel plate with a thickness of 1mm-3mm. The steel plate of this thickness is selected because it is close to the common thickness of the vehicle body. At the same time, the thickness should not be too small to avoid deformation of the steel plate during the test.

[0053] Optionally, as an embodiment of the present disclosure, Figure 2 As shown, the device also includes a mounting bracket 9 and a mounting support 10, the mounting bracket 9 is used to mount the microphone 2, the mounting support 10 is used to fix the mounting bracket 9 to the inner wall of the box 1, and the mounting bracket 9 is a mesh structure. In order to collect test data, the microphone 2 needs to be set in the box 1 and not in direct contact with the inner wall of the box 1, so as to reduce the influence of irrelevant factors on the test results, and setting the mounting bracket 9 as a mesh can, on the one hand, minimize the resonance of the mounting bracket 9 and improve the accuracy of the data, and on the other hand, reduce the limitation on the internal structure of the box 1, so that the transmission of sound is more uniform and the transmission effect is better.

[0054] Alternatively, if Figure 4 As shown, the mounting bracket 9 may be formed by a plurality of steel wires arranged in an array. For example, the mounting bracket 9 may be a mesh structure composed of 5 rows*5 columns of steel wires.

[0055] Optionally, in order to facilitate supporting the mounting bracket 9, the mounting support 10 can be L-shaped, including a vertical part and a horizontal part. The mounting support 10 is fixed to the inner wall of the box body 1 through the L-shaped vertical part, and the mounting bracket 9 is supported on the horizontal part of the mounting support 10.

[0056] Optionally, as an embodiment of the present disclosure, Figure 2 and Figure 4 As shown, there are multiple microphones 2, which are arranged at intervals on the mounting bracket 9. Arranging multiple microphones 2 in the box 1 can ensure that sound data from multiple different positions are collected during the test process, and the obtained data is more accurate, which is more convenient for establishing a high-precision simulation model.

[0057] The present disclosure does not limit the number of microphones 2 and the arrangement of multiple microphones 2 on the mounting bracket 9. Figure 4 As shown, in one embodiment of the present disclosure, the bracket is roughly square, with sixteen evenly distributed small squares, and six microphones 2 can be arranged on each mounting bracket 9, of which four microphones 2 are respectively located at the four corners of the mounting bracket 9, and the other two microphones 2 are located at the midpoints of two opposite sides of the square composed of four small squares located near the center point.

[0058] like Figure 7 As shown, a wiring hole 16 is formed at the bottom of the box 1 for passing the connection wire of the microphone 2 out of the box 1. After the wiring operation is completed, the wiring hole 16 needs to be sealed with an airtight black tape to ensure the sealing of the box 1.

[0059] The diameter of the connection hole 16 can be approximately 30 mm, so as to facilitate the passage of the wiring harness while preventing the influence of the hole being too large on the sealing of the chamber 11 or the test result.

[0060] Optionally, as an embodiment of the present disclosure, Figure 2 and Figure 5 As shown, there are multiple mounting brackets 9, and the multiple brackets are arranged at intervals in the height direction of the box body 1. Multiple microphones 2 are arranged on the multiple mounting brackets 9, respectively, and are arranged in sequence along the height direction of the box body 1. The sound absorbing material piece 4 is arranged on the bottom wall of the box body 1. The microphone 2 can obtain multiple sets of data from close to the sound absorbing material piece 4 to far away from the sound absorbing material piece 4, which is conducive to improving the accuracy of the test results.

[0061] The present disclosure does not limit the specific number of mounting brackets 9, which can be determined based on factors such as the height of the box body 1. Figure 5 In the illustrated embodiment, there are three mounting brackets 9 .

[0062] Optionally, as an embodiment of the present disclosure, Figure 5and Figure 6 As shown, the support seat is also provided with a positioning column 101, which is used to be plugged and positioned with the plug-in portion on the mounting bracket 9 during the installation process of the mounting bracket 9 and the support seat. Since the mounting bracket 9 needs to be disassembled and assembled many times during the use of the above device, in order to ensure that the mounting bracket 9 is in the same position each time the test is performed, the support seat can provide accurate positioning for the mounting bracket 9 to ensure the installation accuracy, and on the other hand, the mounting bracket 9 can be better installed through the cooperation of the positioning column 101 and the plug-in portion.

[0063] Alternatively, if Figure 6 As shown, the plug-in portion can be the position where two columns of the mounting bracket 9 are connected to form the corners of the mounting bracket 9 such as steel wires.

[0064] like Figure 2 As shown, optionally, as an embodiment of the present disclosure, the opening 12 can be located on the top side of the box body 1, and the opening 12 is a square opening 12, and the side length of the opening 12 is 300mm-500mm. The opening 12 is arranged on the top side of the box body 1 to facilitate the installation of the vibrating member 3, and the opening 12 is arranged in a square shape because the simple shape processing is more convenient, and the square opening 12 can maximize the use of the area of ​​the box body 1.

[0065] In this embodiment, the side length of the opening 12 is set to 300mm-500mm because the size of the opening 12 should not be too small. If the size is too small, the vibration part 3 will have too few modes and the test results will be too single, which is not conducive to benchmarking the simulation model for optimization. Within this range, it is conducive to ensuring the mode of the vibration part 3 and avoiding problems such as difficulty in sealing due to an opening that is too large.

[0066] It should be noted that in other embodiments of the present disclosure, the opening 12 may be in other shapes, such as circular or rectangular, which is not limited in the present disclosure, and its size may also be flexibly set.

[0067] Optionally, as an embodiment of the present disclosure, Figure 1 and Figure 5As shown, the box 1 includes a bottom plate 13, a top plate 14, and four side plates 15 connected between the bottom plate 13 and the top plate 14. The cross section of the box 1 is rectangular, and the opening 12 is set on the top plate 14. The structure of the box 1 is set to a relatively simple form. When benchmarking modeling in the simulation system, fewer structures need to be established, which is convenient for modeling. At the same time, fewer structures mean fewer influencing factors, which is beneficial to improve the accuracy of the test results of the simulation model to a certain extent. The box 1 generally uses bakelite because the rigidity of the box 1 needs to be large enough, so that the modes of the sound insulation box 1 itself are as small as possible, reducing the resonance between the box 1 and the chamber 11, and ensuring the accuracy of the test results. However, under the premise of ensuring rigidity, the use of other materials can also meet the requirements of the present disclosure, and the present disclosure does not limit this.

[0068] Optionally, the bottom plate 13, the top plate 14, and the four side plates 15 may be connected by bolts. In addition, in order to ensure the airtightness of the chamber 11 and to ensure that the space inside the box is airtight, sealants may be used to seal between the plates.

[0069] The present disclosure does not limit the size of the box body 1. Optionally, the box body 1 may be a rectangular box body with a size of 534*534*560 mm.

[0070] The present disclosure does not limit the thickness of the bakelite board. Optionally, the thickness of the bakelite board may be 20 mm.

[0071] In addition, casters 110 are installed at the bottom of the box 1 to facilitate the movement of the box 1, making the test environment more flexible, wherein there may be four casters 110, which are respectively located at the four corners of the bottom plate 13.

[0072] Optionally, as an embodiment of the present disclosure, the above-mentioned device further includes a digital acquisition device (not shown) and a force hammer (not shown), the force hammer is used to excite the vibration member 3 to vibrate, and the force hammer, the vibration response detector and the microphone 2 are all electrically connected to the digital acquisition device, so as to process the vibration response detected by the microphone 2 and the vibration response detector through the digital acquisition device to obtain the corresponding noise transfer function (NTF) and vibration transfer function (VTF). The noise transfer function and vibration transfer function of the device can be benchmarked with the simulation model.

[0073] Among them, VTF refers to the vibration velocity response divided by the excitation force, and the unit is m / s / N. NTF refers to the sound pressure response divided by the excitation force, and the unit is Pa / N.

[0074] Multiple excitation points can be evenly distributed on the outer surface of the vibration part 3, and a hammer can be used to strike them in sequence. According to the reciprocity principle, the vibration response VTF of the vibration part 3 and the sound pressure response NTF in the chamber 11 are obtained, and simulation benchmarking is performed to ensure the reliability of the basic model.

[0075] Figures 8 to 13 The comparison between the VTF value and NTF value obtained by the device and the simulation test is shown. Fig.14 and Fig.15 The comparison between the VTF and NTF values ​​obtained by the device and the simulation test and the VTF and NTF values ​​obtained by the existing simulation scheme is shown. It can be seen that the simulation method of the scheme significantly improves the simulation accuracy of vibration and sound pressure.

[0076] Specifically, Figure 8 It is a schematic diagram of comparing the VTF-RMS value obtained by the device at the measuring point of the cover plate (i.e., the vibrating member) when no acoustic material (including sound absorbing material and sound insulating material) is provided in the chamber of the box body in an embodiment of the present disclosure with the VTF-RMS value obtained by the simulation model at the corresponding measuring point of the cover plate (on the vibrating member). L0 and L1 refer to the curves of the VTF-RMS values ​​in the two cases respectively.

[0077] Fig. 9 It is a schematic diagram of comparing the NTF-RMS value obtained by the device at the measuring point of the sound cavity (chamber) in the box when no acoustic material is set in the chamber of the box provided by an embodiment of the present disclosure and the NTF-RMS value obtained by the simulation model at the corresponding measuring point of the sound cavity (chamber) in the box. C0 and C1 refer to the curves of the NTF-RMS values ​​in the two cases respectively.

[0078] Fig.10 It is a schematic diagram of comparison of the VTF-RMS value obtained by the device at the cover plate (vibration part) measurement point when no acoustic material is provided in the chamber of the box body, the VTF-RMS value obtained by the device at the cover plate (vibration part) measurement point when a PU part is provided in the chamber bottom surface of the box body, and the VTF-RMS value obtained at the corresponding measurement point of the cover plate (vibration part) when a PU part is provided on the chamber bottom surface in the simulation model. L0, L2 and L3 refer to the curves of the VTF-RMS values ​​in the three cases respectively.

[0079] Fig.11It is a comparative schematic diagram of the NTF-RMS value obtained by the device at the measuring point of the sound cavity (chamber) in the box when no acoustic material is arranged in the chamber of the box, the NTF-RMS value obtained by the device at the measuring point of the sound cavity (chamber) in the box when a PU is arranged on the bottom surface of the chamber of the box, and the NTF-RMS value obtained at the corresponding measuring point of the sound cavity (chamber) in the box when a PU is arranged on the bottom surface of the chamber in the simulation model. C0, C2 and C3 refer to the curves of the NTF-RMS values ​​in the three cases respectively.

[0080] Fig.12 It is a comparative diagram of the VTF-RMS value obtained by the device at the cover plate (vibration member) measuring point when a PU member is provided on the bottom surface of the chamber of the box body, the VTF-RMS value obtained by the device at the cover plate (vibration member) measuring point when a PU member is provided in the bottom surface of the chamber of the box body and an EVA member is provided on the vibration member, and the VTF-RMS value obtained at the corresponding measuring point of the cover plate (vibration member) when a PU member is provided on the bottom surface of the chamber and an EVA member is provided on the vibration member in the simulation model. L2, L4 and L5 refer to the curves of the VTF-RMS values ​​in the three cases respectively.

[0081] Fig.13 It is a comparative schematic diagram of the NTF-RMS value obtained by the device at the measuring point of the sound cavity (chamber) in the box when a PU part is provided on the bottom surface of the chamber of the box, the NTF-RMS value obtained by the device at the measuring point of the sound cavity (chamber) in the box when a PU part is provided on the bottom surface of the chamber of the box and an EVA part is provided on the vibrating part, and the NTF-RMS value obtained at the corresponding measuring point of the sound cavity (chamber) in the box when a PU part is provided on the bottom surface of the chamber and an EVA part is provided on the vibrating part in the simulation model. C2, C4 and C5 refer to the curves of the NTF-RMS values ​​in the three cases respectively.

[0082] Fig.14 It is a schematic diagram for comparing the VTF-RMS value obtained by the device at the measuring point of the cover plate (vibrating member) when a PU member is provided on the bottom surface of the chamber and an EVA member is provided on the vibrating member, the VTF-RMS value obtained at the corresponding measuring point of the cover plate (vibrating member) when a PU member is provided on the bottom surface of the chamber and an EVA member is provided on the vibrating member in a simulation model, and the VTF-RMS value obtained by the device at the measuring point of the cover plate (vibrating member) when a PU member is provided on the bottom surface of the chamber and an EVA member is provided on the vibrating member provided by an existing simulation scheme. L4, L5 and L6 refer to the curves of the VTF-RMS values ​​in the three cases respectively.

[0083] Fig.15It is a comparative diagram of the NTF-RMS value obtained by the device at the measuring point of the sound cavity (chamber) in the box when a PU part is provided on the bottom surface of the chamber and an EVA part is provided on the vibrating part, the NTF-RMS value obtained at the corresponding measuring point of the sound cavity (chamber) in the box when a PU part is provided on the bottom surface of the chamber and an EVA part is provided on the vibrating part in an embodiment of the present disclosure, and the NTF-RMS value obtained by the device at the measuring point of the sound cavity (chamber) in the box when a PU part is provided on the inner wall of the box and an EVA part is provided on the cover plate of the box provided by the existing scheme. In the existing scheme, the mass of the sound absorbing and insulating material is usually evenly distributed on the sound insulation box. C4, C5 and C6 refer to the curves of the NTF-RMS values ​​in the three cases respectively.

[0084] Among them, RMS stands for root mean square, which is the abbreviation of Root Mean Square, NTF-RMS is the root mean square of the noise transfer function, and VTF-RMS is the root mean square of the vibration transfer function.

[0085] Here, at this time, the sound absorbing material is not limited to PU, and the sound insulating material is not limited to PU+EVA.

[0086] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0087] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0088] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A device for benchmarking with vehicle component performance simulation test, characterized in that: The invention comprises a housing (1), a microphone (2), a vibrating member (3) and a vibration response detector, wherein a chamber (11) is formed inside the housing (1), an opening (12) connected to the chamber (11) is provided on the housing (1), the microphone (2) is installed in the chamber (11), the vibrating member (3) is used to cover the opening (12) so that the chamber (11) forms a sealed chamber, and the vibrating member (3) is used to vibrate to radiate a sound pressure signal and a vibration signal to the inside of the housing (1), the microphone (2) is used to obtain a sound pressure response generated by the sound pressure signal in the chamber (11), and the vibration response detector is used to obtain a vibration response generated by the vibration signal on the vibrating member (3), wherein the sound pressure response and the vibration response are used to compare with the sound pressure response and the vibration response simulated by a simulation model established based on the device, the structure of the simulation model is the same as that of the device, and the magnitude and the excitation point of the excitation applied to the vibrating member (3) are the same.

2. The device according to claim 1, characterized in that The device further comprises a sound absorbing material piece (4), wherein the sound absorbing material piece (4) is arranged on the bottom surface of the chamber (11); the microphone (2) is further used to obtain a sound pressure response in the chamber (11) after the sound absorbing material piece (4) is arranged; and the vibration response detector is further used to obtain a vibration response on the vibration piece (3) after the sound absorbing material piece (4) is arranged.

3. The device according to claim 2, characterized in that The device further comprises a sound insulation material piece (5), wherein the sound insulation material piece (5) is arranged on a side of the vibration piece (3) facing the chamber (11); the microphone (2) is further used to obtain a sound pressure response in the chamber (11) after the sound absorption material piece (4) and the sound insulation material piece (5) are provided; and the vibration response detector is further used to obtain a vibration response on the vibration piece (3) after the sound absorption material piece (4) and the sound insulation material piece (5) are provided.

4. The device according to any one of claims 1 to 3, characterized in that The device further comprises a first clamping member (6), a second clamping member (7) and a fastener. The thickness of the first clamping member (6) and the second clamping member (7) is greater than the thickness of the vibrating member (3). The first clamping member (6) and the second clamping member (7) are pressed against the upper surface and the lower surface of the vibrating member (3) respectively. The first clamping member (6), the vibrating member (3) and the second clamping member (7) are respectively provided with a first mounting hole (61), a second mounting hole (31) and a third mounting hole (71). One end of the fastener passes through the first mounting hole (61), the second mounting hole (31) and the third mounting hole (71) in sequence and is fixed to the box body (1).

5. The device according to any one of claims 1 to 3, characterized in that The device further comprises a mounting bracket (9) and a mounting support (10), wherein the mounting bracket (9) is used to mount the microphone (2), and the mounting support (10) is used to fix the mounting bracket (9) to the inner wall of the box (1), and the mounting bracket (9) is a mesh structure.

6. The device according to claim 5, characterized in that There are a plurality of microphones (2), and the plurality of microphones (2) are arranged at intervals on the mounting bracket (9).

7. The device according to claim 5, characterized in that The device further comprises a sound absorbing material piece (4), the sound absorbing material piece (4) being arranged on the bottom surface of the chamber (11), and a plurality of mounting brackets (9), the plurality of mounting brackets (9) being arranged at intervals in the height direction of the box body (1).

8. The device according to claim 5, characterized in that A positioning column (101) is also provided on the mounting support (10), and the positioning column (101) is used to be plugged and positioned with a plug-in portion on the mounting support (9) during the installation process of the mounting support (9) and the mounting support (10).

9. The device according to any one of claims 1 to 3, characterized in that: The opening (12) is located on the top side of the box body (1); the opening (12) is a square opening; the side length of the opening (12) is 300 mm-500 mm.

10. The device according to claim 9, characterized in that The box body (1) comprises a bottom plate (13), a top plate (14), and four side plates (15) connected between the bottom plate (13) and the top plate (14); the cross section of the box body (1) is rectangular, and the opening (12) is arranged on the top plate (14).

11. The device according to any one of claims 1 to 3, characterized in that The device also includes a digital acquisition device and a force hammer, wherein the force hammer is used to excite the vibration member (3) to vibrate, and the force hammer, the vibration response detector and the microphone (2) are respectively electrically connected to the digital acquisition device.

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