CN-118706955-B - NVH sound insulation test method and sound insulation test module

CN118706955BCN 118706955 BCN118706955 BCN 118706955BCN-118706955-B

Abstract

The application relates to an NVH sound insulation testing method and a sound insulation testing module, comprising the following steps of splicing sound insulation modules with different sizes to form a testing module with a fixing cavity of a piece to be tested; and fixing the to-be-tested piece in the to-be-tested piece fixing cavity through the test module, and testing NVH performance of the to-be-tested piece. The test module with the fixed cavity of the piece to be tested is spliced by the sound insulation module with the unnecessary size, so that the size of the fixed cavity of the piece to be tested which is spliced is conveniently adjusted, when the NVH sound insulation performance of a certain part of a car body needs to be tested, the number of the sound insulation modules which are spliced into the test module can be timely adjusted according to the size and the shape of the piece to be tested, the technical problems that in the related art, each part of the car body is detected by adopting a single clamp, a longer preparation period is needed, the test cost of the clamp is higher, and the whole clamp is heavy are solved.

Inventors

SUN HONGYE
YANG KAIJIANG
GAO FANGYONG
CHEN ZHIJUN
WU XUAN

Assignees

东风汽车集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20240704

Claims (5)

1. The NVH sound insulation testing method is characterized by comprising the following steps of: Splice multiunit sound insulation module (1) with different sizes, make multiunit sound insulation module (1) with different sizes splice into test module (2) that have a fixed chamber (3) of piece that awaits measuring, include: Splicing the sound insulation modules (1) with different sizes into a complete sound insulation wall, and detaching part of the sound insulation modules (1) from the sound insulation wall according to the shape of the piece to be tested (4) to form a test module (2) with a fixed cavity (3) of the piece to be tested; Each group of sound insulation modules (1) comprises at least two sound insulation blocks (11) with the same size, the at least two sound insulation blocks (11) are mutually fixed, and sound insulation materials are filled in each sound insulation block (11); The sound insulation blocks (11) in all groups of the sound insulation modules (1) have the same thickness; Two sound insulation blocks (11) in each group of sound insulation modules (1) are overlapped and staggered, and the distance between the side walls on the same side of the two sound insulation blocks (11) is the same as the thickness of the sound insulation blocks (11); Each sound insulation block (11) is provided with two side seals (111), each side seal (111) is arranged on two adjacent sides of each sound insulation block (11) in a surrounding mode, the two side seals (111) are arranged on different sides of each sound insulation block (11), and the two side seals (111) have height differences along the thickness direction of each sound insulation block (11); One side of each two sound insulation blocks (11) in each group of sound insulation modules (1) facing each other is provided with a surface seal (112), each surface seal (112) in each sound insulation block (11) is arranged at intervals with the other sound insulation block (11), one surface seal (112) of each sound insulation block (11) is arranged at one side close to the sound insulation block (11) matched with the surface seal, and the surface seal (112) of the other sound insulation block (11) is arranged at one side far away from the sound insulation block (11) matched with the surface seal; the to-be-tested piece (4) is fixed in the to-be-tested piece fixing cavity (3) through the testing module (2), and NVH performance test is conducted on the to-be-tested piece (4).
2. The NVH sound insulation testing method of claim 1, characterized in that the fixing the part to be tested (4) in the fixing cavity (3) of the part to be tested through the testing module (2) includes: the periphery of the piece to be tested (4) is fixed on the testing module (2), so that at least part of the piece to be tested (4) is positioned in the fixing cavity (3) of the piece to be tested.
3. The NVH sound insulation testing method of claim 1, characterized in that the fixing the part to be tested (4) in the fixing cavity (3) of the part to be tested through the testing module (2) includes: placing the to-be-tested piece (4) in a to-be-tested piece fixing cavity (3) of the test module (2), and fixing the periphery of the to-be-tested piece (4) with the test module (2); And fixing a sound insulation module (1) with a corresponding size on the inner wall of the fixing cavity (3) of the piece to be tested, so that the sound insulation module (1) covers the whole piece to be tested (4) along the direction perpendicular to the plate surface of the piece to be tested (4).
4. A method for testing NVH sound insulation according to claim 3, characterized in that after said fixing of the sound insulation module (1) of corresponding dimensions on the inner wall of the fixing cavity (3) of the part to be tested, it comprises: and filling a gap between the sound insulation module (1) and the to-be-detected piece (4) with a sound insulation material.
5. NVH sound insulation test module, its characterized in that includes: the plurality of groups of sound insulation modules (1) are provided with different sizes; multiple groups of sound insulation modules (1) with different sizes are spliced to form a fixed cavity (3) of the piece to be tested; Each group of sound insulation modules (1) comprises at least two sound insulation blocks (11) with the same size, the at least two sound insulation blocks (11) are mutually fixed, and sound insulation materials are filled in each sound insulation block (11); The sound insulation blocks (11) in all groups of the sound insulation modules (1) have the same thickness; Two sound insulation blocks (11) in each group of sound insulation modules (1) are overlapped and staggered, and the distance between the side walls on the same side of the two sound insulation blocks (11) is the same as the thickness of the sound insulation blocks (11); Each sound insulation block (11) is provided with two side seals (111), each side seal (111) is arranged on two adjacent sides of each sound insulation block (11) in a surrounding mode, the two side seals (111) are arranged on different sides of each sound insulation block (11), and the two side seals (111) have height differences along the thickness direction of each sound insulation block (11); Two of the sound insulation blocks (11) in each group of sound insulation modules (1) are provided with face seals (112) on one side facing each other, each face seal (112) in each sound insulation block (11) is arranged at intervals with the other sound insulation block (11), one face seal (112) of each sound insulation block (11) is arranged on one side close to the sound insulation block (11) matched with the face seal (112), and the face seal (112) of the other sound insulation block (11) is arranged on one side far away from the sound insulation block (11) matched with the face seal.

Description

NVH sound insulation test method and sound insulation test module Technical Field The application relates to the technical field of sound insulation tests, in particular to an NVH sound insulation test method and a sound insulation test module. Background With the development of automobile technology, consumers have increasingly higher requirements on the sensory quality of automobiles. In-car NVH is a comprehensive problem in measuring the quality of automobile manufacture, and its perception to automobile users is most direct and superficial. The NVH problem of vehicles is one of the concerns of various large-vehicle manufacturing enterprises and parts enterprises in the International automotive industry. The statistics show that about 1/3 of the fault problem of the whole vehicle is related to the NVH problem of the vehicle, and about 20% of research and development cost of each large automobile enterprise is consumed for solving the NVH problem of the vehicle, so that the NVH performance test of the vehicle when leaving the factory is particularly important, wherein the vehicle body is large in size and directly wraps a passenger cabin, and therefore the NVH performance test of the vehicle body is the important aspect of the NVH performance test of the vehicle. In the related art, in order to avoid mutual interference of all parts of a vehicle body, all parts of the vehicle body are often disassembled in a blocking way and are independently tested, and in the testing process, all parts need to use independent clamps, so that the surface density of the clamps is improved to finish detection, and concrete can be poured in the clamps. The detection mode not only needs a longer preparation period, but also has higher trial production cost of the clamp, and the whole clamp is also heavier. Disclosure of Invention The application provides an NVH sound insulation testing method and a sound insulation testing module, which can solve the technical problems that in the related art, a long preparation period is required for detecting each part of a vehicle body by adopting an independent clamp, the trial production cost of the clamp is high, and the whole clamp is heavy. According to the NVH sound insulation testing method, sound insulation modules with different sizes are spliced to form a testing module with a fixing cavity of a piece to be tested, the piece to be tested is fixed in the fixing cavity of the piece to be tested through the testing module, and NVH performance testing is conducted on the piece to be tested. In combination with the first aspect, in one embodiment, the splicing of the sound insulation modules with different sizes to form a test module with a fixing cavity of the part to be tested comprises splicing the sound insulation modules with different sizes to form a complete sound insulation wall, and removing part of the sound insulation modules from the sound insulation wall according to the shape of the part to be tested to form the test module with the fixing cavity of the part to be tested. With reference to the first aspect, in one embodiment, the fixing the part to be tested in the fixing cavity of the part to be tested through the testing module includes fixing the peripheral sides of the part to be tested to the testing module, so that at least part of the part to be tested is located in the fixing cavity of the part to be tested. In combination with the first aspect, in one embodiment, the fixing the workpiece to be tested in the fixing cavity of the workpiece to be tested through the testing module comprises the steps of placing the workpiece to be tested in the fixing cavity of the workpiece to be tested of the testing module, fixing the periphery of the workpiece to be tested with the testing module, and fixing a sound insulation module with corresponding size on the inner wall of the fixing cavity of the workpiece to be tested, so that the sound insulation module covers the whole workpiece to be tested along the direction perpendicular to the plate surface of the workpiece to be tested. In combination with the first aspect, in one implementation mode, after the sound insulation module with the corresponding size is fixed on the inner wall of the fixing cavity of the to-be-tested piece, the method comprises the step of filling a sound insulation material in a gap between the sound insulation module and the to-be-tested piece. In a second aspect, the embodiment of the application provides an NVH sound insulation testing module which is characterized by comprising a plurality of groups of sound insulation modules, wherein the groups of sound insulation modules are different in size, and the groups of sound insulation modules with different sizes are spliced to form a fixing cavity of a piece to be tested. In combination with the second aspect, in one embodiment, each group of the sound insulation modules includes at least two sound insulation blocks with the same size, at least two