Energy-saving device for integrally detecting vibration reduction, noise reduction and impact resistance of composite material

Abstract

The utility model relates to an energy-saving device for integrally detecting vibration and noise reduction and shock resistance of a composite material, which is characterized in that a rectangular opening is designed at the bottom of a silencing box, and the four sides and the top of the silencing box are surrounded by a layered structure formed by multiple sound-absorbing materials; the two side walls and the rear side wall in the silencing box body are provided with wavy curved surface sound absorption cotton. The reverberation box adopts a multi-layer sound insulation structure, and a rectangular opening corresponding to the silencing box is also formed in the top of the reverberation box; hemispherical reflecting surfaces with different radiuses are mounted on the inner walls of the rear side arm, the left side wall and the right side wall of the reverberation box, so that the sound energy density of each part in the reverberation box is ensured to be consistent; according to the utility model, the accuracy of the detection result is improved, the detection process is more time-saving, material-saving and energy-saving, the detection equipment is easier to carry, the detection condition is easy to meet, and the detection environment is easy to build.

Description

Technical Field

[0001] The utility model belongs to the technical field of composite material performance testing, and specifically relates to an energy-saving device for integrated testing of composite material vibration reduction, noise reduction and impact resistance performance. Background Art

[0002] Composite materials have lightweight, high-strength structural characteristics and excellent mechanical properties, which are of great significance to the accelerated deployment of high-performance weapons and the accelerated upgrading of power equipment. The performance test of composite materials is a crucial link before the application of composite materials. However, there are still some deficiencies in the current research on the vibration reduction, noise reduction and impact resistance of composite materials.

[0003] Existing technologies rarely test the integrated properties of materials, and the vibration reduction, noise reduction, and impact resistance of materials are often tested separately. Patent CN201621422512.8 designs a vibration reduction efficiency test platform that can simulate vibrations of different intensities and frequencies, and then debug the active vibration reduction device on the test platform according to different vibration sources. Patent CN202211519990.0 designs an impact test device. Patent 202211422294.8 provides a method and device for measuring the amplitude of mechanical vibration, which obtains the vibration parameters of the test object by collecting and processing transmitted light and reflected light. Patent CN202110629580.0 designs a strong electromagnetic environment excitation active frequency selection material harmonic noise test method and system to detect the noise reduction performance of the material. The above patents are limited to a certain characteristic of the test material and cannot comprehensively test and evaluate the material. Patent CN201821032661.2 designs a sensor temperature and impact comprehensive test bench. Patent CN202011149452.8 designs an impact vibration test device and system, but the test still requires a test bench and cannot be portable. Although the above patents have achieved comprehensive testing in certain aspects, they still do not integrate the research on vibration, noise, and impact characteristics, and have the disadvantages of large loss of materials, high energy consumption, and lack of portability.

[0004] Regarding the vibration reduction, noise reduction, and impact resistance of composite materials, there is a lack of an integrated multifunctional testing instrument that can complete comprehensive performance testing on the same platform, which effectively avoids the problems of inefficiency and changes in inherent characteristic parameters caused by separate testing. In addition, the existing test systems and instruments are too large, requiring a lot of manpower and material resources to build the experimental system, resulting in extremely high costs and not suitable for use on engineering sites. The lack of corresponding testing equipment and methods has become a major obstacle to the objective evaluation of the performance of composite materials, seriously restricting the progress of the research and development of my country's new generation of air force and naval weapons and equipment. Utility Model Content

[0005] The utility model provides an energy-saving device for integrated detection of vibration reduction, noise reduction and impact resistance of composite materials. The specific technical scheme is as follows:

[0006] An energy-saving device for integrated detection of vibration reduction, noise reduction and impact resistance of composite materials, including a sound insulation reverberation box with an air layer, an upper sound insulation door, a lower sound insulation door, a muffler box, curved sound-absorbing cotton, a laser displacement sensor, a sound pressure sensor, a high-speed camera, a magnetic suction return type fixed upper fixture, a supporting connection platform, a magnetic suction return type fixed lower fixture, a high-power tweeter horn, a horn rotating seat, a projectile recovery device, a horn lifting frame, a data acquisition instrument, a projectile sensor, a serpentine retractable capillary, piezoelectric ceramics and a piezoelectric ceramic drive power supply, and a projectile centrifugal acceleration ejection seat;

[0007] The bottom of the muffler box is designed with a rectangular opening, and its four sides and top are surrounded by a layered structure composed of multiple sound-absorbing materials;

[0008] The two side walls and the rear side wall inside the muffler box are provided with wave-shaped curved sound-absorbing cotton;

[0009] The reverberation box adopts a multi-layer sound insulation structure, and a rectangular opening corresponding to the muffler box is also arranged on the top;

[0010] The reverberation box is provided with hemispherical reflection surfaces of different radii on the inner walls of the rear arm and the left and right side walls, so as to ensure that the sound energy density at each location in the reverberation box is consistent, thereby ensuring the accuracy of the test results;

[0011] The front of the muffler and reverberation box are both provided with rectangular door frames, and rubber sealing strips are arranged around them. The rectangular door frame on the muffler is configured with an upper soundproof door, and the rectangular door frame on the reverberation box is configured with a lower soundproof door.

[0012] The supporting connecting platform is arranged between the rectangular hole of the middle connecting part of the muffler box and the reverberation box;

[0013] The magnetic return type fixed upper clamp is fixed inside the muffler box at the upper end of the supporting connection platform, and the magnetic return type fixed lower clamp is fixed inside the reverberation box at the lower end of the supporting connection platform. Through the magnetic attraction method, it can not only float up and down to accept composite plates of different thicknesses, but also fix the composite material without damaging the composite material plate;

[0014] The two boxes of the reverberation box and the muffler box are connected by a bolt group and fixed by nuts;

[0015] The laser displacement sensor and the high-speed camera are arranged on the inner wall of the rear side of the muffler box, and a plurality of sound pressure sensors are arranged on the inner wall of the rear side of the muffler box;

[0016] The horn lifting frame is arranged below the horn and connected to the horn through the horn rotating seat. The relative position of the horn in the reverberation box is changed by the horn lifting frame, and the sound range of the horn is changed by raising and lowering the horn.

[0017] Install the MLFLHL composite material specimen to be tested into the upper magnetic suction fixing fixture and the lower magnetic suction fixing fixture, adjust the height and fix it by magnetic suction;

[0018] The horn rotating seat changes the vertical angle of the horn through a built-in hinge structure;

[0019] The data acquisition instrument is arranged outside the reverberation box;

[0020] The projectile centrifugal acceleration ejection seat is a high-speed rotating design, one end of which is connected to a data acquisition instrument, and the other end is connected to a jet pipe, and the centrifugal force generated by its rotation is used to accelerate the projectile, and the MLFLHL composite material specimen placed in the fixture is impacted at a fixed point or at any position;

[0021] This impact mode is used to simulate different impact energies that may be encountered in actual use. Inside the ejection mechanism, the projectile sensor is given the function of capturing the impact force. The sensor it contains is combined with a pre-set wireless transmitter, making data collection more convenient. The receiving end of the wireless transmitter is directly connected to the data acquisition instrument, which allows researchers to track and record the impact contact force generated when the projectile hits the composite material in real time. By adjusting the rotation speed of the centrifugal acceleration ejection device, the operator can finely control the impact energy of the ejected projectile, which can not only achieve slight deformation testing of composite samples, but also simulate high-energy penetration impact events. When the impact energy is low, the projectile sensor will fall into the projectile recovery device located at the bottom of the anechoic box to avoid damage and facilitate recovery. If the impact energy is too large, the projectile will penetrate the composite specimen under test and will be captured by the recovery device in the anechoic box above, ensuring safety after the test and reducing material waste.

[0022] The serpentine retractable thin tube is installed on the inner wall of the reverberation box, and the reverberation box is connected to the data acquisition instrument through the built-in wire;

[0023] The pellet retrieving device is arranged at the bottom of the reverberation chamber to prepare for receiving the pellet sensor;

[0024] Multiple groups of piezoelectric ceramics are pasted on the lower surface of the MLFLHL composite material specimen under test by high-strength adhesive, and the signal output channel of the data acquisition instrument is controlled to send out a pulse excitation signal. After being amplified by the piezoelectric ceramic driving power supply, the vibration excitation amplitude and frequency of the multiple groups of piezoelectric ceramics are controlled according to the principle of inverse piezoelectric effect.

[0025] Piezoelectric ceramics can be easily connected to the output end of the driving power supply. Once a vibration test is required, the serpentine retractable tube is unfolded, and multiple groups of piezoelectric ceramics are tightly attached to the lower surface of the composite material sample to be tested through professional high-strength adhesives, ensuring the effective transmission of energy information.

[0026] The energy-saving device for integrated detection of vibration reduction, noise reduction and impact resistance of composite materials, the preferred embodiment of which is that the inner and outer layers of the layered structure of the muffler box are made of steel plates, and a 40mm thick air barrier is set between the steel plates to enhance the sound insulation effect;

[0027] The outer surface and the inner surface of the multi-layer sound insulation structure of the reverberation box are both made of steel plates, and an air layer is sandwiched between the steel plates to enhance the sound insulation performance.

[0028] The energy-saving device for integrated detection of vibration reduction, noise reduction and impact resistance of composite materials has a preferred embodiment in which the upper soundproof door and the lower soundproof door are designed as hollow structures.

[0029] The energy-saving device for integrated detection of vibration reduction, noise reduction and impact resistance of composite materials has a preferred embodiment that the sound-emitting surface of the tweeter horn is a trumpet-shaped surface with a protrusion inside, which is used to provide a noise excitation signal with sufficient energy, controllable excitation intensity and excitation frequency.

[0030] The integrated energy-saving device for detecting the vibration reduction, noise reduction and impact resistance of composite materials has a preferred embodiment that the horn rotating seat can provide the horn with a 45° rotation capability about the vertical axis, and can also rotate 360° in the horizontal direction to send out signals in all directions, so as to make the test data more diverse and accurate.

[0031] The pellet recovery device is mainly composed of solid foam made of chemical components such as polyether polyol, foam stabilizer, catalyst, foaming agent, cell opener, etc. This special foam can effectively capture the pellet sensor launched by the ejection system and provide sufficient protection for it, ensuring the safe recovery of the sensor for reuse, while reducing the risk of damage to equipment or personnel during the test.

[0032] Beneficial Effects

[0033] Compared with the traditional method, the utility model can test a certain performance separately or in an integrated manner. The improved integrated testing equipment can save a lot of testing time, and the materials consumed in the testing process are reduced by 50%-67% compared with the previous testing methods. Through optimization, the instrument also improves the testing accuracy when testing noise, vibration and impact resistance. At the same time, compared with the traditional method, the testing process is more energy-saving, the testing equipment is easier to carry, the testing conditions are easy to meet, and the testing environment is easy to build. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A three-dimensional diagram of an energy-saving device for integrated testing of composite materials’ vibration reduction, noise reduction, and impact resistance performance;

[0035] Figure 2 The main view of the energy-saving device for integrated testing of the vibration reduction, noise reduction and impact resistance of composite materials;

[0036] Figure 3 A cross-sectional view of an energy-saving device for integrated testing of the vibration reduction, noise reduction and impact resistance of composite materials;

[0037] Figure 4 This is a top view of the muffler box;

[0038] Figure 5 A top view of the reverberation box.

[0039] Figure 1 Middle: 1-silencer, 2-reverberation box, 3-upper soundproof door, 4-lower soundproof door, 5-bolts, 6-nuts, 7-curved sound-absorbing cotton, 8-laser displacement sensor, 9-sound pressure sensor, 10-high-speed camera, 11-magnetic return type fixed upper fixture, 12-support connection platform, 13-magnetic return type fixed lower fixture, 14-projectile sensor, 15-horn, 16-horn rotating seat, 17-projectile recovery device, 18-horn lifting frame, 19-data acquisition line, 20-snake-shaped retractable capillary, 21-piezoelectric ceramics, 22-piezoelectric ceramic drive power supply, 23-projectile centrifugal acceleration ejection seat. DETAILED DESCRIPTION

[0040] The invention is further described below in conjunction with the drawings in the utility model, but it should not be understood that the above-mentioned subject scope of the utility model is limited to the following embodiments. Without departing from the above-mentioned ideas of the utility model, various substitutions and changes are made according to the common technical knowledge and customary means in the field, which should be included in the protection scope of the utility model.

[0041] An energy-saving device for integrated detection of vibration reduction, noise reduction and impact resistance of composite materials, comprising a sound insulation reverberation box 2 with an air layer, an upper sound insulation door 3, a lower sound insulation door 4, a muffler box 1, curved sound-absorbing cotton 7, a laser displacement sensor 8, a sound pressure sensor 9, a high-speed camera 10, a magnetic return type fixed upper fixture 11, a supporting connection platform 12, a magnetic return type fixed lower fixture 13, a high-power tweeter horn 15, a horn rotating seat 16, a projectile recovery device 17, a horn lifting frame 18, a data acquisition instrument 19, a projectile sensor 14, a serpentine telescopic capillary 20, a piezoelectric ceramic 21 and a piezoelectric ceramic driving power supply 22 and a projectile centrifugal acceleration ejection seat 23;

[0042] The bottom of the muffler box 1 is designed with a rectangular opening, and its four sides and top are surrounded by a layered structure composed of multiple sound-absorbing materials;

[0043] The two side walls and the rear side wall of the muffler box 1 are provided with wave-shaped curved sound-absorbing cotton 7;

[0044] The reverberation box 2 adopts a multi-layer sound insulation structure, and a rectangular opening corresponding to the muffler box 1 is also provided on the top;

[0045] The reverberation box 2 is provided with hemispherical reflection surfaces of different radii on the inner walls of the rear arm and the left and right side walls, so as to ensure that the sound energy density at each location in the reverberation box 2 is consistent, thereby ensuring the accuracy of the test results;

[0046] The front of the muffler box 1 and the reverberation box 2 are both provided with rectangular door frames, and rubber sealing strips are arranged around them. The rectangular door frame on the muffler box 1 is configured with an upper soundproof door 3, and the rectangular door frame on the reverberation box 2 is configured with a lower soundproof door 4;

[0047] The supporting connecting platform 12 is arranged between the rectangular hole of the middle connecting part of the muffler box 1 and the reverberation box 2;

[0048] The magnetic return type fixed upper clamp 11 is fixed inside the muffler box 1 at the upper end of the supporting connection platform 12, and the magnetic return type fixed lower clamp 13 is fixed inside the reverberation box 2 at the lower end of the supporting connection platform 12. Through the magnetic attraction method, it can not only float up and down to accept composite plates of different thicknesses, but also fix the composite material without damaging the composite material plate;

[0049] The two boxes of the reverberation box 2 and the muffler box 1 are connected by a bolt group and fixed by nuts;

[0050] The laser displacement sensor 8 and the high-speed camera 10 are arranged on the inner wall of the rear side of the muffler box 1, and a plurality of sound pressure sensors are arranged on the inner wall of the rear side of the muffler box 1;

[0051] The horn lifting frame 18 is arranged below the horn 15 and connected to the horn 15 via the horn rotating seat 16. The relative position of the horn 15 in the reverberation box 2 is changed by the horn lifting frame 18, and the sound range of the horn 15 is changed by raising and lowering the horn 15.

[0052] The MLFLHL composite material specimen to be tested is installed and placed in the upper magnetic suction fixing fixture 11 and the lower magnetic suction fixing fixture 13, and the height is adjusted and fixed by magnetic suction;

[0053] The horn rotating seat 16 changes the vertical angle of the horn 15 through a built-in hinge structure;

[0054] The data acquisition device 19 is arranged outside the reverberation box 2;

[0055] The projectile centrifugal acceleration ejection seat 23 is a high-speed rotating design, one end of which is connected to a data acquisition instrument, and the other end is connected to a jet pipe, and the centrifugal force generated by its rotation is used to accelerate the projectile, and the MLFLHL composite material specimen placed in the fixture is impacted at a fixed point or at any position;

[0056] This impact mode is used to simulate different impact energies that may be encountered in actual use. Inside the ejection mechanism, the projectile sensor 14 is given the function of capturing impact force. The sensor it contains is combined with a preset wireless transmitter, making data collection more convenient. The receiving end of the wireless transmitter is directly connected to the data acquisition instrument, which allows researchers to track and record the impact contact force generated when the projectile hits the composite material in real time. By adjusting the rotation speed of the centrifugal acceleration ejection device, the operator can finely control the impact energy of the ejected projectile, which can not only achieve slight deformation testing of composite material samples, but also simulate high-energy penetration impact events. When the impact energy is low, the projectile sensor 14 will fall into the projectile recovery device 17 located at the bottom of the silencer 1 to avoid damage and facilitate recovery. If the impact energy is too large, the projectile will penetrate the MLFLHL composite material specimen under test, and it will be captured by the recovery device in the upper silencer 1, ensuring safety after the test and reducing material waste.

[0057] The serpentine retractable thin tube is installed on the inner wall of the reverberation box 2, and the reverberation box 2 is connected to the data acquisition instrument through the built-in wire;

[0058] The pellet retrieving device 17 is arranged at the bottom of the reverberation chamber to prepare to receive the pellet sensor 14;

[0059] Multiple groups of piezoelectric ceramics 21 are adhered to the lower surface of the MLFLHL composite material specimen under test by high-strength adhesive, and the signal output channel of the data acquisition instrument is controlled to send out a pulse excitation signal. After amplification and processing by the piezoelectric ceramic driving power supply 22, the vibration excitation amplitude and frequency of the multiple groups of piezoelectric ceramics 21 are controlled according to the principle of inverse piezoelectric effect, thereby generating a multi-point vibration excitation effect on the MLFLHL composite material specimen under test. After debugging is completed, the excitation signal is turned off and the device is in standby state.

[0060] The piezoelectric ceramics 21 can be easily connected to the output end of the driving power supply. Once a vibration test is required, the serpentine retractable tube is unfolded, and multiple groups of piezoelectric ceramics 21 are tightly attached to the lower surface of the composite material sample to be tested through professional high-strength adhesives, ensuring the effective transmission of energy information.

[0061] The muffler 1 has a layered structure with steel plates inside and outside, and a 40 mm thick air barrier is provided between the steel plates to enhance the sound insulation effect;

[0062] The outer surface and the inner surface of the multi-layer sound insulation structure of the reverberation box 2 are both made of steel plates, and an air layer is sandwiched between the steel plates to enhance the sound insulation performance.

[0063] The upper soundproof door 3 and the lower soundproof door 4 are designed as hollow structures.

[0064] The sound-generating surface of the treble horn 15 is a trumpet-shaped surface with a protrusion inside, which is used to provide a noise excitation signal with sufficient energy, controllable excitation intensity and excitation frequency.

[0065] The horn rotating seat 16 can provide the horn 15 with the ability to rotate 45° about the vertical axis, and can also enable it to rotate 360° in the horizontal direction to send out signals in various directions, so as to make the test data more diverse and accurate.

[0066] The pellet recovery device 17 is mainly composed of solid foam made of chemical components such as polyether polyol, foam stabilizer, catalyst, foaming agent, cell opener, etc. This special foam can effectively capture the pellet sensor 14 launched by the ejection system and provide sufficient protection for it, ensuring the safe recovery of the sensor for reuse, while reducing the risk of damage to equipment or personnel during the test.

[0067] The testing method of the energy-saving device for integrated detection of vibration reduction, noise reduction and impact resistance of composite materials specifically comprises the following steps:

[0068] (1) The MLFLHL composite material specimen to be tested is installed and placed in the upper magnetic suction fixing fixture 11 and the lower magnetic suction fixing fixture 13, and the height is adjusted and the specimen is fixed by magnetic suction;

[0069] (2) Arrange the vibration, noise and impact excitation sources in place and adjust them to standby status;

[0070] Multiple groups of piezoelectric ceramics 21 are pasted on the lower surface of the composite material specimen to be tested by a high-strength adhesive, and the signal output channel of the data acquisition instrument 19 is controlled to send a pulse excitation signal. After amplification by the piezoelectric ceramic driving power supply 22, the vibration excitation amplitude and frequency of the multiple groups of piezoelectric ceramics 21 are controlled according to the inverse piezoelectric effect principle, thereby generating a multi-point vibration excitation effect on the composite material specimen to be tested. After debugging is completed, the excitation signal is turned off and the device is in a standby state;

[0071] The second signal output channel of the control data acquisition instrument 19 is sent out to send out a random excitation signal with a controllable excitation frequency range. After passing through the pre-power amplifier and the pure post-power amplifier, the signal is connected to the input end of the horn 15 to excite the horn to produce a random noise excitation effect. After debugging, the specified noise excitation amplitude and frequency range are achieved. At this time, the excitation signal is turned off and the system is in a standby state.

[0072] Start the projectile centrifugal acceleration ejection seat 23 and adjust it to reach the required rotation speed, maintain the high-speed stable rotation of the device, and put the projectile sensor 14 in the ejection state;

[0073] (3) Arrange laser displacement sensors 8, multiple sound pressure sensors 9 and high-speed cameras 10 at the measurement points of interest, so as to effectively obtain the vibration response, sound pressure signal, impact deformation and response signal of the composite material under test, connect the above sensors through the input channel of the data acquisition instrument, and realize real-time recording and storage of different signals;

[0074] Position the projectile recovery device 17 near the predetermined impact point, ready to receive the projectile sensor 14;

[0075] (4) Carry out noise excitation, and carry out experiments under different test parameters according to the principle of increasing the excitation amplitude from small to large and the random frequency range from small to large. The laser displacement sensor 8 and multiple sound pressure sensors 9 are used to record the noise radiation sound pressure and vibration response performance of the tested composite material thin plate under single noise excitation, and evaluate its vibration reduction and noise reduction effect under different noise excitation test parameters;

[0076] Conduct vibration excitation, and carry out experiments under different test parameters according to the principle of increasing the number of excitation points, increasing the excitation amplitude, and increasing the excitation frequency range. Use laser displacement sensors 8 and multiple sound pressure sensors 9 to record the noise radiation sound pressure and vibration response performance of the tested composite material thin plate under single vibration excitation, and evaluate its vibration reduction and noise reduction effect under different vibration excitation test parameters;

[0077] (6) Finally, the vibration reduction, noise reduction and impact resistance integrated test is carried out in the order of first performing noise excitation, then performing vibration excitation, and finally performing impact excitation. Experiments are carried out under different test parameters, and different types of data are recorded by using a laser displacement sensor 8, multiple sound pressure sensors 9 and a high-speed camera 10. The key indicators are calculated to comprehensively and accurately evaluate the vibration reduction, noise reduction and impact resistance performance;

[0078] According to the principle of increasing the excitation amplitude from small to large and the random frequency range from small to large, according to the random noise excitation with different test parameters, and using multiple sound pressure sensors 9 to test the noise sound pressure in the two boxes, finally the sound absorption coefficient and sound insulation coefficient of the tested composite material specimen in different excitation amplitudes and frequency ranges are obtained;

[0079] According to the principle of increasing the number of excitation points, increasing the excitation amplitude, and increasing the excitation frequency range, multiple groups of piezoelectric ceramics 21 are controlled to generate pulse vibration excitation, and tested by the laser displacement sensor 8; the logarithmic attenuation rate, damping ratio of each order, and dynamic stiffness of each order are obtained by performing time domain VMD analysis and spectrum analysis on the signal;

[0080] Impact excitation tests are carried out at different impact excitation positions in the order of small to large impact excitation speeds. The damage area and pit depth of the tested composite material specimen are recorded by a high-speed camera 10, and the impact impedance is measured by a force sensor, and the impact contact force-structure displacement curve is plotted.

Claims

1. An energy-saving device for integrated detection of vibration reduction, noise reduction and impact resistance of composite materials, characterized in that: It comprises a soundproof reverberation box with an air layer (2), an upper soundproof door (3), a lower soundproof door (4), a muffler (1), curved sound-absorbing cotton (7), a laser displacement sensor (8), a sound pressure sensor (9), a high-speed camera (10), a magnetic suction type fixed upper fixture (11), a supporting connection platform (12), a magnetic suction type fixed lower fixture (13), a high-power high-pitched horn (15), a horn rotating seat (16), a projectile recovery device (17), a horn lifting frame (18), a data acquisition instrument (19), a projectile sensor (14), a serpentine telescopic capillary (20), a piezoelectric ceramic (21) and a piezoelectric ceramic driving power supply (22) and a projectile centrifugal acceleration ejection seat (23); The bottom of the muffler box (1) is designed with a rectangular opening, and the four sides and the top are surrounded by a layered structure composed of multiple sound-absorbing materials; The two side walls and the rear side wall inside the muffler box (1) are provided with wave-shaped curved sound-absorbing cotton (7); The reverberation box (2) adopts a multi-layer sound insulation structure, and a rectangular opening corresponding to the muffler box (1) is also arranged on the top; The reverberation box (2) is provided with hemispherical reflection surfaces of different radii on the inner walls of the rear arm and the left and right side walls, thereby ensuring that the sound energy density at various locations in the reverberation box (2) is consistent, thereby ensuring the accuracy of the test results; The front of the muffler box (1) and the reverberation box (2) are both provided with rectangular door frames, and rubber sealing strips are arranged around them. The rectangular door frame on the muffler box (1) is configured with an upper soundproof door (3), and the rectangular door frame on the reverberation box (2) is configured with a lower soundproof door (4); The supporting connection platform (12) is arranged between the rectangular hole in the middle connection part of the muffler box (1) and the reverberation box (2); The magnetic return type fixing upper clamp (11) is fixed inside the muffler box (1) at the upper end of the supporting connection platform (12), and the magnetic return type fixing lower clamp (13) is fixed inside the reverberation box (2) at the lower end of the supporting connection platform (12). By means of magnetic attraction, it is not only able to float up and down to accept composite plates of different thicknesses, but also can fix the composite material without damaging the composite material plate. The two boxes of the reverberation box (2) and the muffler box (1) are connected by a bolt group and are locked and fixed by nuts; The laser displacement sensor (8) and the high-speed camera (10) are arranged on the inner wall of the rear side of the muffler box (1), and a plurality of sound pressure sensors are arranged on the inner wall of the rear side of the muffler box (1); The horn lifting frame (18) is arranged below the horn (15) and is connected to the horn (15) via a horn rotating seat (16). The relative position of the horn (15) in the reverberation box (2) is changed by the horn lifting frame (18), and the sound range of the horn (15) is changed by raising and lowering the horn (15); The MLFLHL composite material specimen to be tested is installed and placed in a magnetic suction type fixed upper fixture (11) and a magnetic suction type fixed lower fixture (13), the height is adjusted and the specimen is fixed by magnetic suction; The horn rotating seat (16) changes the vertical angle of the horn (15) through a built-in hinge structure; The data acquisition device (19) is arranged outside the reverberation box (2); The projectile centrifugal acceleration ejection seat (23) is designed to rotate at a high speed, one end of which is connected to a data acquisition instrument, and the other end of which is connected to a jet pipe, and the centrifugal force generated by its rotation is used to accelerate the projectile, so as to impact the MLFLHL composite material specimen placed in the fixture at a fixed point or at any position; The serpentine retractable thin tube is installed on the inner wall of the reverberation box (2), and the reverberation box (2) is connected to the data acquisition instrument via a built-in wire; The pellet recovery device (17) is arranged at the bottom of the reverberation chamber and is used to prepare to receive the pellet sensor (14); Multiple groups of piezoelectric ceramics (21) are adhered to the lower surface of the MLFLHL composite material specimen to be tested by a high-strength adhesive, and a signal output channel of a data acquisition instrument is controlled to send a pulse excitation signal. After amplification processing by a piezoelectric ceramic driving power supply (22), the vibration excitation amplitude and frequency of the multiple groups of piezoelectric ceramics (21) are controlled according to the principle of the inverse piezoelectric effect, thereby generating a multi-point vibration excitation effect on the MLFLHL composite material specimen to be tested.

2. The energy-saving device for integrated detection of vibration reduction, noise reduction and impact resistance of composite materials according to claim 1 is characterized in that: The muffler (1) has a layered structure in which steel plates are used for the inner and outer layers, and a 40 mm thick air barrier is provided between the steel plates to enhance the sound insulation effect; The outer surface and the inner surface of the multi-layer sound insulation structure of the reverberation box (2) are both made of steel plates, and an air layer is sandwiched between the steel plates to enhance the sound insulation performance.

3. The energy-saving device for integrated detection of vibration reduction, noise reduction and impact resistance of composite materials according to claim 1 is characterized in that: The upper soundproof door (3) and the lower soundproof door (4) are designed as hollow structures.

4. The energy-saving device for integrated detection of vibration reduction, noise reduction and impact resistance of composite materials according to claim 1 is characterized in that: The sound-generating surface of the treble horn (15) is a horn-shaped surface with a protrusion inside, which is used to provide a noise excitation signal with sufficient energy, controllable excitation intensity and excitation frequency.

5. The energy-saving device for integrated detection of vibration reduction, noise reduction and impact resistance of composite materials according to claim 1 is characterized in that: The horn rotating seat (16) can provide the horn (15) with a 45° rotation capability about the vertical axis, and can also enable it to rotate 360° in the horizontal direction to send out signals in various directions, so as to make the test data more diverse and accurate.

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