CN110045025B - Large-scale wall plate part simulation sound insulation amount test method based on low-temperature test box device - Google Patents
Large-scale wall plate part simulation sound insulation amount test method based on low-temperature test box device Download PDFInfo
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Abstract
A large-scale wall plate part simulation sound insulation testing method based on a low-temperature test box device belongs to the field of testing methods of sound insulation performance of materials in a low-temperature state, and the method utilizes an ultralow-temperature small test box with a refrigeration function to be used in combination with a sound insulation chamber, so that a standard sound insulation chamber with high temperature control cost is simulated and replaced; meanwhile, a large wallboard part to be tested is cut into a small-size rectangular sample plate with a reduced size, so that a standard test window in a standard sound insulation chamber is simulated by using a rectangular simulation test window arranged on the ultralow temperature small test box, the inside of the small test box is simulated into a sound producing chamber in the standard sound insulation chamber, the mute environment of a sound eliminating chamber outside the small test box is simulated into a sound receiving chamber in the standard sound insulation chamber, and the acoustic measurement of the simulated sound insulation quantity of the small-size sample plate is completed. The low-temperature test box device is simple and practical in structure and convenient to operate, and the cost of the simulation sound insulation testing method based on the low-temperature test box device is low.
Description
Technical Field
The invention belongs to the field of a test method for sound insulation performance of a material in a low-temperature state, and particularly relates to a test method for simulating sound insulation capacity of a large wallboard component based on a low-temperature test box device.
Background
The sound insulation is a measure index of sound absorption and insulation performance of the reaction material, the standard sound insulation test method is carried out in a standard sound insulation chamber comprising a sound generating chamber and a sound receiving chamber, a standard test window of 1m multiplied by 1m is arranged in the center of a partition wall for separating a sound producing chamber and a sound receiving chamber, when in use, at the room temperature of 25 ℃, the standard test window is sealed in a sound insulation way by using a tested plate, then a test sound wave with fixed and known frequency spectrum and sound level is emitted by a test sound generator from a position which is 1000mm away from the center of the standard test window in a sound producing room, and the sound receiving chamber on the other side is 500mm away from the center of the standard test window to acquire the data of the test sound wave through a sound level meter, therefore, the weighted sound insulation RW data of the large-scale tested plate in the normal temperature state is obtained according to the insertion loss and weighted sound insulation testing method known in the field of sound insulation testing.
The rail train often comprises a plurality of large wall plate parts such as roofs, side walls and floors, and the sound insulation data of the large wall plate parts under the normal temperature condition can be obtained by the known conventional sound insulation testing method. However, some newly designed train models in alpine regions need to obtain sound insulation performance parameters of the train body wall plate material in an extremely cold environment at-50 ℃ so as to provide theoretical basis for sound insulation and noise reduction design.
However, the test environment of the standard sound-proof chamber is 25 ℃ of room temperature, which cannot provide a constant-temperature extremely cold environment of-50 ℃, and the existing method for creating a low-temperature environment in the standard sound-proof chamber is as follows: the sound insulation door of the standard sound insulation chamber is opened in winter to be communicated with the chamber, and the cold air outside the chamber in winter is utilized to cool the chamber naturally, but the construction method of the low-temperature environment is severely limited and limited by natural temperatures such as geographical positions, seasons and the like, and the standard sound insulation chamber can be cooled to about-25 ℃ generally, but the sound insulation test requirement at the ambient temperature of-50 ℃ is still difficult to meet, so the material sound insulation test research at the state of-50 ℃ still belongs to the technical blank. In addition, the modification of a standard sound-proof room into an ultra-low temperature laboratory that can be cooled to-50 ℃ by refrigeration equipment requires very high construction and maintenance costs. The scheme of transferring the large wall plate component from the pre-customized refrigeration house to the standard sound insulation chamber consumes more time in the installation process between the large wall plate component and the standard test window, so that the temperature of the large wall plate component is increased rapidly, the temperature change is difficult to control, and the test precision and the economic benefit of the scheme are not ideal enough.
Disclosure of Invention
The device aims to solve the problems that the existing standard sound insulation chamber can not provide a test environment at the temperature of-50 ℃, and the temperature control modification scheme is high in cost and poor in economic benefit; the invention provides a large wallboard component simulation sound insulation amount testing method based on a low-temperature test box device, and solves the technical problems that the temperature of a large wallboard component is fast and the testing precision is not ideal enough due to the fact that the time consumption of the installation process between the large wallboard component and a standard testing window in a sound insulation chamber is high.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a large wallboard component simulation sound insulation testing method based on a low-temperature test box device comprises the following steps:
the method comprises the following steps: manufacturing a low-temperature test box foundation model device with an uncertain port size; the low-temperature test box base model device with the uncertain port size comprises a low-temperature test box base model, a test sound generating device and a sound level meter, wherein the low-temperature test box base model comprises a low-temperature box body, four rapid vertical pressing clamps, a heat-preservation sound-insulation sealing ring and a window pressing plate, a vertical rectangular simulation test window is formed in the center of the upper end face of the low-temperature box body, the heat-preservation sound-insulation sealing ring is fixedly connected with the upper end of an opening of the rectangular simulation test window in a matched mode, the window pressing plate is of a rectangular frame structure in a shape like a Chinese character 'hui', the shape and the size of an inner frame of the window pressing plate are completely identical to those of the rectangular simulation test window, and the size of an outer frame of the window pressing plate is 120% of that of the inner frame; the four rapid vertical pressing tongs are fixedly connected to the outer side of the window pressing plate in a pairwise symmetrical mode, the lower end of each rapid vertical pressing tong is fixedly connected with the upper end face of the low-temperature box body, and the pressing end of each rapid vertical pressing tong is correspondingly located above the window pressing plate; the test sound generating device comprises a sound generator, a power amplifier and a loudspeaker, wherein the loudspeaker is fixedly connected to the center of the bottom surface in the low-temperature box body, and the direction of a loudspeaker port of the loudspeaker is vertical upwards; the sound generator and the power amplifier are positioned outside the low-temperature test box basic model and are electrically connected with the loudspeaker through a signal cable; the sound level meter is fixed by a bracket and suspended at a position 500mm above the axis of the rectangular simulation test window;
step two: specifically determining the port size of the basic model device of the low-temperature test chamber in the first step by a comparative experiment method, which specifically comprises the following substeps:
step 2.1: manufacturing a large gypsum board for port size calibration, wherein the size of the large gypsum board is 1000mm multiplied by 12 mm;
step 2.2: at room temperature of 25 ℃, using the large gypsum board for port size calibration in the step 2.1 to perform sound insulation plugging on a standard test window in a standard sound insulation chamber;
step 2.3: in a standard sound insulation chamber, obtaining standard sound insulation chamber sound insulation data RW1 of a large gypsum board for port size calibration in a normal temperature state by using an insertion loss and weighted sound insulation testing method well known in the field of sound insulation testing;
step 2.4: putting all the low-temperature test box basic model devices with uncertain port sizes in the step one into a standard anechoic chamber to isolate environmental noise;
step 2.5: temporarily detaching the four rapid vertical pressing tongs and the window pressing plate on the low-temperature box body in the step one, and performing sound insulation sealing on the rectangular simulation test window with the current size and the heat-insulation sound-insulation sealing ring with the current corresponding size by using the self weight of a large gypsum board for port size calibration;
step 2.6: regarding the inner space of the basic model of the low-temperature test box as a sound emitting chamber, regarding the space of a sound eliminating chamber outside the basic model of the low-temperature test box as a sound receiving chamber, emitting known test sound waves with fixed frequency spectrum and sound level by a test sound generating device inside the basic model of the low-temperature test box at the room temperature of 25 ℃, and acquiring data of the test sound waves by a sound level meter at a position 500mm away from the center of a rectangular simulation test window in the sound eliminating chamber, thereby obtaining test box basic model sound insulation data RW2 of a large gypsum board for port size calibration at the normal temperature according to an insertion loss and weighted sound insulation testing method known in the field of sound insulation testing;
step 2.7: calculating the percentage of standard sound insulation chamber sound insulation data RW1 obtained in step 2.3 and test box base model sound insulation data RW2 obtained in step 2.6 of the large gypsum board for port size calibration to obtain the ratio percentage K of the standard sound insulation chamber sound insulation data RW1 and the test box base model sound insulation data RW 2; if the K value is less than 96%, executing the step 2.8; if the K value is more than 104%, executing a step 2.9; if K is more than or equal to 96% and less than or equal to 104%, determining the current rectangular simulation test window as the final size, setting the low-temperature box body under the size as a small sample low-temperature test box with the fixed size, and then executing a third step;
step 2.8: remanufacturing the rectangular simulation test window in the step one and the corresponding heat-preservation and sound-insulation sealing ring and window pressing plate according to the amplification ratio of 102%, and then, re-executing the step 2.5 to the step 2.7;
step 2.9: remanufacturing the rectangular simulation test window in the step one and the corresponding heat-preservation and sound-insulation sealing ring and window pressing plate according to the reduction ratio of 98%, and then, re-executing the step 2.5 to the step 2.7;
step three: measuring a dimension parameter S of a rectangular simulation test window on the small-size sample low-temperature test box with the sized dimension obtained in the step 2.7, and cutting a large wallboard component to be tested into a rectangular small-size sample plate, wherein the dimension parameter of the small-size sample plate is S multiplied by 102%;
step four: completely pressing the heat-insulating and sound-insulating sealing ring by using the lower end surface of the small-size sample plate in the step three; then, matching and overlapping the window pressing plate and the small-size sample plate piece, and vertically aligning the centers of the window pressing plate and the small-size sample plate piece; vertically pressing and fixing the upper end face of the window pressing plate by using four rapid vertical pressing tongs, thereby completing the sound insulation sealing operation of the small-size sample plate in the step three on the rectangular simulation test window on the small-size sample low-temperature test box with the size being set in the step 2.7;
step five: gradually cooling the small sample low-temperature test box with the fixed size obtained in the step 2.7 to-50 ℃, and maintaining for 30 min;
step six: measuring low-temperature sound insulation data RW3 of the small-size sample plate in a constant temperature environment of-50 ℃ according to a sound insulation test method known in the field of sound insulation test;
step seven: removing the small-size sample plate from the small-size sample low-temperature test chamber, and measuring pre-insertion sound insulation data RW4 of the small-size sample low-temperature test chamber under the condition that a rectangular simulation test window of the small-size sample low-temperature test chamber is not in a sound insulation sealing state according to a sound insulation testing method known in the field of sound insulation testing;
step eight; obtaining weighted sound insulation data RW5 of the small-size sample plate in a low-temperature environment of-50 ℃ according to an insertion loss and weighted sound insulation testing method known in the field of sound insulation testing;
step nine: and repeating the weighted sound insulation quantity solving process from the fourth step to the eighth step for multiple times, and calculating the average value of the data to be used as the final data of the simulated sound insulation quantity of the large-scale wall plate component in the low-temperature environment of 50 ℃ below zero.
The invention has the beneficial effects that: the invention discloses a large-scale wall plate part simulation sound insulation testing method based on a low-temperature test box device, which initiatively provides a method for utilizing an ultralow-temperature small test box with a refrigeration function to be used in combination with a sound insulation chamber, so that a standard sound insulation chamber with high temperature control cost is simulated and replaced; meanwhile, a large wallboard part to be tested is cut into a small-size rectangular sample plate with a reduced size, so that a standard test window in a standard sound insulation chamber is simulated by using a rectangular simulation test window arranged on the ultralow temperature small test box, the inside of the small test box is simulated into a sound producing chamber in the standard sound insulation chamber, the mute environment of a sound eliminating chamber outside the small test box is simulated into a sound receiving chamber in the standard sound insulation chamber, and the acoustic measurement of the simulated sound insulation quantity of the small-size sample plate is completed.
The method also particularly provides a method for adjusting and setting the size of the rectangular simulation test window arranged on the ultralow temperature small test box in a data comparison mode and a specific scheme for determining the size of the small-size sample plate, so that the technical problem that the sizes of the rectangular simulation test window and the small-size sample plate are difficult to confirm easily through mathematical derivation due to the fact that the sound leakage area of the rectangular simulation test window and corresponding sound insulation data are in nonlinear correlation with the window size is solved.
In addition, the invention also has the advantages of simple and practical structure of the low-temperature test box device, convenient operation, low cost of the test method for simulating the sound insulation quantity based on the low-temperature test box device, convenient popularization and the like.
Drawings
FIG. 1 is a schematic diagram of the application of the simulated sound insulation test method for large-scale wall plate components based on a low-temperature test box device;
FIG. 2 is a schematic illustration of the explosive assembly of the base model of the cryogenic test chamber of the present invention;
FIG. 3 is a schematic view of the construction of the window press of the present invention;
fig. 4 is a schematic diagram of the present invention in its application to acoustically sealing a dimensionally stable small sample cold box and its rectangular simulated test window with a small sample piece.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 4, the method for testing the simulated sound insulation of the large wall plate component based on the low-temperature test box device comprises the following steps:
the method comprises the following steps: manufacturing a low-temperature test box foundation model device with an uncertain port size; the low-temperature test box basic model device with the uncertain port size comprises a low-temperature test box basic model 1, a test sound generating device 2 and a sound level meter 3, the low-temperature test box base model 1 comprises a low-temperature box body 1-1, four rapid vertical pressing tongs 1-2, a heat-preservation sound-insulation sealing ring 1-3 and a window pressing plate 1-4, wherein the center of the upper end face of the low-temperature box body 1-1 is provided with a vertical rectangular simulation test window 1-1-1, the heat-preservation sound-insulation sealing ring 1-3 is fixedly connected with the upper end of an opening of the rectangular simulation test window 1-1-1 in a matching way, the window pressing plate 1-4 is of a rectangular frame structure shaped like a Chinese character 'hui', the shape and the size of the inner frame of the window pressing plate are completely the same as those of a rectangular simulation test window 1-1-1, and the size of the outer frame of the window pressing plate 1-4 is 120 percent of that of the inner frame; the four rapid vertical pressing tongs 1-2 are fixedly connected to the outer sides of the window pressing plates 1-4 pairwise symmetrically, the lower end of each rapid vertical pressing tong 1-2 is fixedly connected with the upper end face of the low-temperature box body 1-1, and the pressing end of each rapid vertical pressing tong 1-2 is correspondingly positioned above the window pressing plate 1-4; the test sound generating device 2 comprises a sound generator, a power amplifier 2-1 and a loudspeaker 2-2, wherein the loudspeaker 2-2 is fixedly connected to the center of the bottom surface in the low-temperature box body 1-1, and the direction of a loudspeaker port of the loudspeaker is vertical upwards; the sound generator and the power amplifier 2-1 are electrically connected with the loudspeaker 2-2 through a signal cable outside the low-temperature test box basic model 1 of the sound generator and the power amplifier 2-1; the sound level meter 3 is fixed by a bracket and suspended at a position 500mm above the axis of the rectangular simulation test window 1-1-1;
step two: specifically determining the port size of the basic model device of the low-temperature test chamber in the first step by a comparative experiment method, which specifically comprises the following substeps:
step 2.1: manufacturing a large gypsum board for port size calibration, wherein the size of the large gypsum board is 1000mm multiplied by 12 mm;
step 2.2: at room temperature of 25 ℃, using the large gypsum board for port size calibration in the step 2.1 to perform sound insulation plugging on a standard test window in a standard sound insulation chamber;
step 2.3: in a standard sound insulation chamber, obtaining standard sound insulation chamber sound insulation data RW1 of a large gypsum board for port size calibration in a normal temperature state by using an insertion loss and weighted sound insulation testing method well known in the field of sound insulation testing;
step 2.4: putting all the low-temperature test box basic model devices with uncertain port sizes in the step one into a standard anechoic chamber to isolate environmental noise;
step 2.5: temporarily detaching the four rapid vertical pressing tongs 1-2 and the window pressing plate 1-4 on the low-temperature box body 1-1 in the step one, and performing sound insulation sealing on the rectangular simulation test window 1-1-1 with the current size and the heat-insulation sound-insulation sealing ring 1-3 with the current corresponding size by using the self weight of a large gypsum board for port size calibration;
step 2.6: regarding the inner space of a low-temperature test box base model 1 as a sound generating chamber, regarding the sound damping chamber space outside the low-temperature test box base model 1 as a sound receiving chamber, using a test sound generating device 2 inside the low-temperature test box base model 1 to generate known test sound waves with fixed frequency spectrum and sound level at the room temperature of 25 ℃, and performing data acquisition on the test sound waves through a sound level meter 3 at a position 500mm away from the center of a rectangular simulation test window 1-1-1 in the sound damping chamber, thereby obtaining RW (RW) test box base model sound insulation data 2 of a large gypsum board for port size calibration at the room temperature according to an insertion loss and weighting sound insulation testing method known in the field of sound insulation testing;
step 2.7: calculating the percentage of standard sound insulation chamber sound insulation data RW1 obtained in step 2.3 and test box base model sound insulation data RW2 obtained in step 2.6 of the large gypsum board for port size calibration to obtain the ratio percentage K of the standard sound insulation chamber sound insulation data RW1 and the test box base model sound insulation data RW 2; if the K value is less than 96%, executing the step 2.8; if the K value is more than 104%, executing a step 2.9; if K is more than or equal to 96% and less than or equal to 104%, determining the current rectangular simulation test window 1-1-1 as the final size, setting the low-temperature box body 1-1 under the size as a small sample low-temperature test box with a fixed size, and then executing a third step;
step 2.8: remanufacturing the rectangular simulation test window 1-1-1 in the step one, and the corresponding heat-preservation sound-insulation sealing ring 1-3 and the window pressing plate 1-4 according to the amplification ratio of 102%, and then, re-executing the step 2.5 to the step 2.7;
step 2.9: remanufacturing the rectangular simulation test window 1-1-1 in the step one, and the corresponding heat-preservation and sound-insulation sealing ring 1-3 and the window pressing plate 1-4 according to the reduction ratio of 98%, and then, re-executing the step 2.5 to the step 2.7;
step three: measuring the size parameter S of the rectangular simulation test window 1-1-1 on the small sample low-temperature test box with the sized size obtained in the step 2.7, and cutting the large wallboard component to be tested into a rectangular small sample plate 4, wherein the size parameter of the small sample plate 4 is S x 102%, so that 2% of margin is reserved on the contact surface of the small sample plate 4 and the contact surface of the small sample plate 4, and an ideal effect of sound insulation and sealing is ensured;
step four: the lower end face of the small-size sample plate 4 in the step three is used for completely pressing the heat-insulating and sound-insulating sealing ring 1-3; then, matching and overlapping the window pressing plate 1-4 and the small-size sample plate 4, and vertically aligning the centers of the two; vertically pressing and fixing the upper end face of the window pressing plate 1-4 by using four rapid vertical pressing pliers 1-2, thereby completing the sound insulation sealing operation of the rectangular simulation test window 1-1-1 on the small sample low-temperature test box with the size shaped in the step 2.7 by using the small sample plate 4 in the step three;
step five: gradually cooling the small sample low-temperature test box with the fixed size obtained in the step 2.7 to-50 ℃, and maintaining for 30 min;
step six: measuring low-temperature sound insulation data RW3 of the small-size sample plate 4 in a constant temperature environment of 50 ℃ below zero according to a sound insulation test method known in the field of sound insulation test;
step seven: removing the small-size sample plate 4 from the small-size sample low-temperature test chamber, and measuring pre-insertion sound insulation data RW4 of the small-size sample low-temperature test chamber under the condition that the rectangular simulation test window 1-1-1 is not in sound insulation sealing according to a sound insulation testing method known in the field of sound insulation testing;
step eight; obtaining weighted sound insulation data RW5 of the small-size sample plate 4 in a low-temperature environment of-50 ℃ according to an insertion loss and weighted sound insulation testing method well known in the field of sound insulation testing;
step nine: and repeating the weighted sound insulation quantity solving process from the fourth step to the eighth step for multiple times, and calculating the average value of the data to be used as the final data of the simulated sound insulation quantity of the large-scale wall plate component in the low-temperature environment of 50 ℃ below zero.
When the method for testing the simulated sound insulation of the large-scale wall plate part based on the low-temperature test box device is applied, the port size of the low-temperature test box base model device with uncertain port size and the small sample low-temperature test box with fixed size are adopted, the low-temperature test boxes with the constant temperature function of 50 ℃ below zero used by the low-temperature test box base model device and the small sample low-temperature test box with fixed size are provided by an ice chest refrigeration equipment manufacturer in a customized mode, and the adopted refrigeration and constant temperature technologies are mature and open in the prior art.
Claims (1)
1. A large wallboard component simulation sound insulation testing method based on a low-temperature test box device is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: manufacturing a low-temperature test box foundation model device with an uncertain port size; the low-temperature test box base model device with the uncertain port size comprises a low-temperature test box base model (1), a test sound generating device (2) and a sound level meter (3), wherein the low-temperature test box base model (1) comprises a low-temperature box body (1-1), four rapid vertical pressing tongs (1-2), a heat-preservation sound-insulation sealing ring (1-3) and a window pressing plate (1-4), a vertical rectangular simulation test window (1-1-1) is arranged at the center of the upper end face of the low-temperature box body (1-1), the heat-preservation sound-insulation sealing ring (1-3) is fixedly connected with the upper end of an opening of the rectangular simulation test window (1-1-1) in a matching mode, the window pressing plate (1-4) is of a rectangular frame structure in a shape like a Chinese character 'hui', the shape and the size of an inner frame of the window pressing plate are completely the same as that of the rectangular simulation test window (1-1-1-1), the size of the outer frame of the window pressing plate (1-4) is 120 percent of that of the inner frame thereof; the four rapid vertical pressing tongs (1-2) are fixedly connected to the outer sides of the window pressing plates (1-4) in a pairwise symmetrical mode, the lower end of each rapid vertical pressing tong (1-2) is fixedly connected with the upper end face of the low-temperature box body (1-1), and the pressing end of each rapid vertical pressing tong (1-2) is correspondingly located above the window pressing plates (1-4); the test sound generating device (2) comprises a sound generator, a power amplifier (2-1) and a loudspeaker (2-2), wherein the loudspeaker (2-2) is fixedly connected to the center of the bottom surface in the low-temperature box body (1-1), and the direction of a loudspeaker port of the loudspeaker is vertical upwards; the sound generator and the power amplifier (2-1) are positioned outside the low-temperature test box basic model (1), and the sound generator and the power amplifier (2-1) are electrically connected with the loudspeaker (2-2) through a signal cable; the sound level meter (3) is fixed by a bracket and is suspended at a position 500mm above the axis of the rectangular simulation test window (1-1-1);
step two: specifically determining the port size of the basic model device of the low-temperature test chamber in the first step by a comparative experiment method, which specifically comprises the following substeps:
step 2.1: manufacturing a large gypsum board for port size calibration, wherein the size of the large gypsum board is 1000mm multiplied by 12 mm;
step 2.2: at room temperature of 25 ℃, using the large gypsum board for port size calibration in the step 2.1 to perform sound insulation plugging on a standard test window in a standard sound insulation chamber;
step 2.3: in a standard sound insulation chamber, obtaining standard sound insulation chamber sound insulation data RW1 of a large gypsum board for port size calibration in a normal temperature state by using an insertion loss and weighted sound insulation testing method well known in the field of sound insulation testing;
step 2.4: putting all the low-temperature test box basic model devices with uncertain port sizes in the step one into a standard anechoic chamber to isolate environmental noise;
step 2.5: temporarily detaching four rapid vertical pressing pliers (1-2) and window pressing plates (1-4) on the low-temperature box body (1-1) in the step one, and performing sound insulation sealing on the rectangular simulation test window (1-1-1) with the current size and the heat insulation and sound insulation sealing ring (1-3) with the current corresponding size by using the self weight of a large gypsum board for port size calibration;
step 2.6: regarding the inner space of a basic model (1) of a low-temperature test box as a sound generating chamber, regarding a sound eliminating chamber outside the basic model (1) of the low-temperature test box as a sound receiving chamber, using a test sound generating device (2) inside the basic model (1) of the low-temperature test box to generate a test sound wave with fixed frequency spectrum and known sound level at the room temperature of 25 ℃, and performing data acquisition on the test sound wave by a sound level meter (3) at a position 500mm away from the center of a rectangular simulation test window (1-1-1) in the sound eliminating chamber, thereby obtaining test box basic model sound insulation data RW2 of a large gypsum board for port size calibration at normal temperature according to an insertion loss and weighted sound insulation test method known in the field of sound insulation test;
step 2.7: calculating the percentage of standard sound insulation chamber sound insulation data RW1 obtained in step 2.3 and test box base model sound insulation data RW2 obtained in step 2.6 of the large gypsum board for port size calibration to obtain the ratio percentage K of the standard sound insulation chamber sound insulation data RW1 and the test box base model sound insulation data RW 2; if the K value is less than 96%, executing the step 2.8; if the K value is more than 104%, executing a step 2.9; if K is more than or equal to 96% and less than or equal to 104%, determining the current rectangular simulation test window (1-1-1) as the final size, setting the low-temperature box body (1-1) under the size as a small sample low-temperature test box with a fixed size, and then executing a third step;
step 2.8: remanufacturing the rectangular simulation test window (1-1-1) in the step one, and the corresponding heat-preservation and sound-insulation sealing ring (1-3) and the window pressing plate (1-4) according to the amplification ratio of 102%, and then, re-executing the step 2.5 to the step 2.7;
step 2.9: remanufacturing the rectangular simulation test window (1-1-1) in the step one, and the corresponding heat-preservation and sound-insulation sealing ring (1-3) and the window pressing plate (1-4) according to the reduction ratio of 98%, and then, re-executing the step 2.5 to the step 2.7;
step three: measuring a dimension parameter S of a rectangular simulation test window (1-1-1) on the small-sample low-temperature test box with the sized dimension obtained in the step 2.7, and cutting a large wallboard component to be tested into a rectangular small-sample plate (4), wherein the dimension parameter of the small-sample plate (4) is S multiplied by 102%;
step four: the lower end face of the small-size sample plate (4) in the step three is used for completely pressing the heat-insulating and sound-insulating sealing ring (1-3); then, matching and overlapping the window pressing plate (1-4) and the small-size sample plate (4) and vertically aligning the centers of the two; vertically compressing and fixing the upper end face of the window pressing plate (1-4) by using four rapid vertical pressing tongs (1-2), thereby completing the sound insulation sealing operation of the rectangular simulation test window (1-1-1) on the small sample low-temperature test box with the size shaped in the step 2.7 by using the small sample plate (4) in the step three;
step five: gradually cooling the small sample low-temperature test box with the fixed size obtained in the step 2.7 to-50 ℃, and maintaining for 30 min;
step six: measuring low-temperature sound insulation data RW3 of the small-size sample plate (4) in a constant temperature environment of 50 ℃ below zero according to a sound insulation test method known in the field of sound insulation test;
step seven: removing the small-size sample plate (4) from the small-size sample low-temperature test chamber, and measuring pre-insertion sound insulation data RW4 of the small-size sample low-temperature test chamber in a state that a rectangular simulation test window (1-1-1) of the small-size sample low-temperature test chamber is not sound-insulated and sealed according to a sound insulation test method known in the field of sound insulation test;
step eight; obtaining weighted sound insulation data RW5 of the small-size sample plate (4) in a low-temperature environment of-50 ℃ according to an insertion loss and weighted sound insulation testing method well known in the field of sound insulation testing;
step nine: and repeating the weighted sound insulation quantity solving process from the fourth step to the eighth step for multiple times, and calculating the average value of the data to be used as the final data of the simulated sound insulation quantity of the large-scale wall plate component in the low-temperature environment of 50 ℃ below zero.
Priority Applications (1)
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1427249A (en) * | 2001-12-13 | 2003-07-02 | 广东科龙电器股份有限公司 | Method of on line testing noise of electromechanical product and testing apparatus |
| CN2758767Y (en) * | 2004-12-22 | 2006-02-15 | 华南理工大学 | Measurer for sound insulation performance of material |
| CN102103136A (en) * | 2009-12-17 | 2011-06-22 | 张永清 | Convenient equipment and method for detecting energy saving and sound insulation of building material |
| CN204556267U (en) * | 2015-03-26 | 2015-08-12 | 奇瑞汽车股份有限公司 | A kind of device for the test of automobile component oise insulation factor |
| CN105891336A (en) * | 2016-03-30 | 2016-08-24 | 北京航天发射技术研究所 | Scaling model machine of large noise isolation device and noise isolation test method of scaling model machine |
| CN207067063U (en) * | 2017-06-07 | 2018-03-02 | 中车长春轨道客车股份有限公司 | A kind of lower digging formula sound insulation testing room |
| CN109187759A (en) * | 2018-09-12 | 2019-01-11 | 华南理工大学 | A kind of sound insulation measurement system based on hand-held sound intensity probe external member |
| CN109541034A (en) * | 2018-11-28 | 2019-03-29 | 中车长春轨道客车股份有限公司 | Train body siding sound insulation property test method based on vehicle semianechoic room environment |
| CN208888187U (en) * | 2018-10-17 | 2019-05-21 | 南京林业大学 | A kind of plate sound-insulation capability measuring device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004029714B3 (en) * | 2004-06-21 | 2006-02-02 | Carcoustics Tech Center Gmbh | Test bench and method for measuring sound insulation or insertion loss on a test object |
| DE102004046200A1 (en) * | 2004-09-22 | 2006-04-06 | Carcoustics Tech Center Gmbh | Mobile test bench to determine the sound insulation or insertion loss of a test object |
| CN104407056B (en) * | 2014-11-28 | 2017-11-07 | 歌尔股份有限公司 | Sound-absorbing material impedance operator and dilatation performance testing device and method of testing |
-
2019
- 2019-05-22 CN CN201910428063.XA patent/CN110045025B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1427249A (en) * | 2001-12-13 | 2003-07-02 | 广东科龙电器股份有限公司 | Method of on line testing noise of electromechanical product and testing apparatus |
| CN2758767Y (en) * | 2004-12-22 | 2006-02-15 | 华南理工大学 | Measurer for sound insulation performance of material |
| CN102103136A (en) * | 2009-12-17 | 2011-06-22 | 张永清 | Convenient equipment and method for detecting energy saving and sound insulation of building material |
| CN204556267U (en) * | 2015-03-26 | 2015-08-12 | 奇瑞汽车股份有限公司 | A kind of device for the test of automobile component oise insulation factor |
| CN105891336A (en) * | 2016-03-30 | 2016-08-24 | 北京航天发射技术研究所 | Scaling model machine of large noise isolation device and noise isolation test method of scaling model machine |
| CN207067063U (en) * | 2017-06-07 | 2018-03-02 | 中车长春轨道客车股份有限公司 | A kind of lower digging formula sound insulation testing room |
| CN109187759A (en) * | 2018-09-12 | 2019-01-11 | 华南理工大学 | A kind of sound insulation measurement system based on hand-held sound intensity probe external member |
| CN208888187U (en) * | 2018-10-17 | 2019-05-21 | 南京林业大学 | A kind of plate sound-insulation capability measuring device |
| CN109541034A (en) * | 2018-11-28 | 2019-03-29 | 中车长春轨道客车股份有限公司 | Train body siding sound insulation property test method based on vehicle semianechoic room environment |
Non-Patent Citations (3)
| Title |
|---|
| High speed train noise emission: Latest investigation of the aerodynamic/rolling noise contribution;Mellet, C;《JOURNAL OF SOUND AND VIBRATION》;20060613;第293卷(第3-5期);第535-546页 * |
| 低温环境下高速列车车内噪声问题及控制方案;孙强;《振动测试与诊断》;20181231;第38卷(第6期);第1217-1222+1296页 * |
| 隔声结构的声学性能试验及仿真分析;徐贝贝;《中国工程机械学报》;20111231;第9卷(第4期);第487-492页 * |
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