CN115979557A - Submersible vehicle structure vibration sound radiation testing device used in large submersible depth environment - Google Patents
Submersible vehicle structure vibration sound radiation testing device used in large submersible depth environment Download PDFInfo
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- CN115979557A CN115979557A CN202211608273.5A CN202211608273A CN115979557A CN 115979557 A CN115979557 A CN 115979557A CN 202211608273 A CN202211608273 A CN 202211608273A CN 115979557 A CN115979557 A CN 115979557A
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Abstract
The invention aims to provide a submersible structure vibration sound radiation testing device used in a large submersible depth environment, which comprises a large submersible depth environment sound vibration simulation cabin, a submersible structure device and a sound vibration signal testing system, wherein the submersible structure device is hung in the large submersible depth environment sound vibration simulation cabin through a hinge hook, and a pressure control valve, a pressure gauge, a first sound vibration simulation cabin bus outlet, a second sound vibration simulation cabin bus outlet, a first water discharge port, a second water discharge port and a hydrophone cable sealing outlet are arranged on the large submersible depth environment sound vibration simulation cabin; a first vibration excitation device, a second vibration excitation device and a vibration acceleration sensor are arranged in the submersible vehicle structure device. The invention is placed on the horizontal ground, and the damping material and the vibration damping material are respectively laid on the inner wall of the sound vibration simulation cabin and the base, so that the large submergence depth environment which is not influenced by ocean current waveguide effect can be simulated, and the quality of the test process is ensured.
Description
Technical Field
The invention relates to a vibration testing device, in particular to a submersible vehicle vibration sound radiation testing device.
Background
The existing testing device for the vibration sound radiation of the submersible structure usually performs experiments under shallow water pressure or performs measurement of the vibration sound radiation of the submersible under atmospheric pressure. The depth change has important influence on the mechanical property and the vibration acoustic property of mechanical equipment, most of the existing submarine radiation noise researches are based on constant sound velocity and conventional vibration sound radiation analysis, and the influence research on the vibration noise of the mechanical equipment caused by the parameter change caused by large submarine depth is less. Research is carried out based on the acoustic radiation rule under the large submarine depth, and relevant characteristics are found, so that the design of a targeted noise reduction scheme can be carried out according to the rule or the difference of the relevant characteristics, and the requirement on relevant acoustic performance is met. Therefore, the method simulates the large submergence depth environment, accurately measures the vibration sound radiation of the submersible structure and finds the law of the submersible structure, and becomes the main content of the current research of the submersible under the large submergence depth environment.
The conventional vibration sound radiation test forecast aiming at the submersible structure mainly comprises the following two categories:
(1) Structural vibration sound radiation testing arrangement under shallow water environment.
The method relies on free shallow water as a test environment, and tests the vibration sound radiation of the submersible vehicle structure under different excitation conditions through devices such as a sealed cable and an underwater sensor to obtain the vibration transmission rule of the submersible vehicle structure. However, the method has the disadvantages that the high-pressure underwater environment with large diving depth cannot be completely simulated, and the influence of depth change on the mechanical property and the vibro-acoustic property of the submersible cannot be completely considered. Because the test environment is an unsealed shallow water area, the underwater acoustic radiation signals are influenced by the shallow sea waveguide effect, and the obtained signal data can also be influenced.
(2) Underwater vibration sound radiation measuring device under specific depth environment
The method is developed according to the expansion rule of spherical waves of sound waves in a free field. The test method is difficult to realize because the peripheral sea area of China is a shallow sea continental shelf and is influenced by a shallow sea waveguide effect, and the test process is greatly influenced by the noise of the marine environment under the marine environment, so that the measurement error is large. The method relies on a specific dock as a test environment, and debugs the instrument equipment by adjusting the postures of the vibration sensor and the hydrophone array in a specific depth environment. After the stability of the testing equipment is ensured, the equipment in the submersible vehicle structure can stably run. The acceleration signal of the vibration sensor and the acoustic signal of the hydrophone array start to be collected, and then the obtained data is processed by a computer. The method can accurately measure the vibration sound radiation of the submersible structure in a specific dock. However, the defects are that the limitation of a test site is too strong, the difficulty of site arrangement is too large, and a large submergence depth environment cannot be simulated.
Disclosure of Invention
The invention aims to provide a submersible structure vibration sound radiation testing device for a large submersible environment, which can simulate the large submersible environment to the greatest extent and accurately measure the vibration sound radiation rules under different working conditions.
The purpose of the invention is realized as follows:
the invention relates to a submersible vehicle structure vibration sound radiation testing device used in a large submersible depth environment, which is characterized in that: the large submersible deep environment sound vibration simulation cabin is provided with a pressure control valve, a pressure gauge, a first sound vibration simulation cabin bus outlet, a second sound vibration simulation cabin bus outlet, a first water discharge port, a second water discharge port and a hydrophone cable sealing outlet; the underwater vehicle structure device is internally provided with a first excitation device, a second excitation device and a vibration acceleration sensor, buses of the first excitation device, the second excitation device and the vibration acceleration sensor extend out of a bus outlet of the underwater vehicle structure device to be connected with a bus outlet of a first sound vibration simulation cabin and a bus outlet of a second sound vibration simulation cabin, and then are connected with a sound vibration signal test system, hydrophones are arranged in the sound vibration simulation cabin in a large underwater deep environment, and cables of the hydrophones extend out of a cable sealing outlet of the hydrophones and are connected with the sound vibration signal test system.
The present invention may further comprise:
1. the large submergence depth environment sound vibration simulation cabin comprises a cabin body and a cabin cover, wherein the cabin cover is connected with the cabin body through a flange and sealed to form a capsule-shaped structure, and damping materials are arranged on the inner wall of the cabin body.
2. The bottom of the sound vibration simulation cabin in the large submergence depth environment is fixed on the horizontal ground by adopting a steel frame supporting structure.
3. A first excitation equipment base and a second excitation equipment base are arranged in the submersible structural device, the first excitation equipment is installed on the first excitation equipment base, the second excitation equipment is installed on the second excitation equipment base, a ring rib reinforcing structure is arranged on the inner wall of the submersible structural device, and a shell, the ring rib reinforcing structure, the first excitation equipment base and the second excitation equipment base of the submersible structural device are respectively provided with a vibration acceleration sensor.
4. Seawater is added into the large submersible deep environment sound vibration simulation cabin through the first water outlet and the second water outlet, and compressed air is added into the large submersible deep environment sound vibration simulation cabin through the pressure control valve, so that a large submersible deep high-pressure environment is maintained.
The invention has the advantages that: the invention adopts a method of controlling the pressure in the sound vibration simulation cabin by the pressure control valve, so that the large diving depth environment where the submersible structural device is positioned is changed. After the excitation equipment stably runs, the running condition of the real submersible vehicle can be simulated through the frequency converter and the signal generator. By means of the technical means, scaling is carried out on the submersible vehicle structure device, and labor and resource waste can be reduced while a real submersible vehicle structure is simulated. Seal whole experimental apparatus through multiple sealed mode, guarantee that the device internal pressure is stable in the test procedure, and then guarantee that the deep environment of dive greatly simulated is not influenced. The whole testing device is placed on the horizontal ground, and the damping material and the vibration reduction material are laid on the inner wall of the sound vibration simulation cabin and the base respectively, so that a large submergence depth environment which is not influenced by the ocean current waveguide effect can be simulated, and the quality of the testing process is guaranteed.
Drawings
FIG. 1 is a schematic flow chart of the operation of the present invention;
FIG. 2 is a front view of a vibro-acoustic simulation pod;
FIG. 3 is a side view of the vibro-acoustic simulation pod;
FIG. 4 is a front view of the submersible structural arrangement;
FIG. 5 is a cross-sectional view of the submersible structural arrangement;
FIG. 6 is a schematic view of the assembly of the sound vibration simulation cabin and the submersible structural device;
fig. 7 is a schematic diagram of the connection between the sound vibration signal testing system and the testing apparatus.
Detailed Description
The invention will now be described in more detail by way of example with reference to the accompanying drawings in which:
with reference to fig. 1-7, the submersible structure vibration sound radiation testing device under the large submersible depth environment comprises a submersible structure device, a large submersible depth environment sound vibration simulation cabin and a sound vibration signal testing system. The submersible structural arrangement includes excitation devices 14 and 15, excitation device bases 13 and 16, and a vibration acceleration sensor 18. The buses of the excitation devices 14 and 15 and the vibration acceleration sensor 18 extend out at the bus outlet 12 of the submersible structure device and are connected with the bus outlets 3 and 5 of the sound vibration simulation cabin through high-pressure sealing pipes and a sound vibration signal test system. After the installation of the internal devices of the submersible structure and the bus connection are finished, the submersible structure is hung in the sound vibration simulation cabin in the deep submersible environment through the hinge hook 11. A hydrophone 19 is arranged in the sound vibration simulation chamber, and a hydrophone cable extends out of the hydrophone cable sealing hole 8 and is connected with a sound vibration signal system. After the test attitude of the hydrophone 19 is adjusted, the excitation devices 14 and 15 are operated and held steady. And assembling the sound vibration simulation cabin cover 1 and the cabin body through the flange bolt assembling holes 10 to carry out cabin sealing treatment. After the sound vibration simulation cabin is sealed, whether a cabin cover 1 of the sound vibration simulation cabin, a pressure control valve 2, a pressure gauge 4, a hydrophone cable sealing hole 8 and water outlets 7 and 9 are in a sealing state or not is checked. Compressed air is added into the sound vibration simulation cabin through the pressure control valve 2 for pressure testing, the pressure in the cabin reaches a specified value, and the problems of structural damage, pressure loss and the like do not occur. At the moment, the internal pressure of the submersible structural device is the same as the atmospheric pressure, and the submersible structural device and the sound vibration simulation cabin are in a high-pressure state. The pressure is relieved through the water outlets 7 and 9, the sea water is added through the water outlets 7 and 9, the compressed air is added through the pressure control valve 2 after the water is added, the reading of the pressure gauge 4 is observed in the pressurizing process, the tightness of the whole sound vibration simulation cabin is checked after the pressurizing is finished, the set pressure is set through the pressure control valve 2, and the large-diving-depth high-pressure environment is maintained.
And checking whether the line connection of the sound vibration signal test system is good or not, and confirming that the power supply is grounded and started. And starting the relevant equipment of the excitation system, and turning on the frequency converter, the power amplifier and the signal generator to ensure that the excitation equipment operates normally. And starting related equipment of the test system, wherein the related equipment comprises a data acquisition instrument, a charge amplifier and a computer, the computer processes the sensor signal received by the data acquisition instrument, forms a corresponding image on computer test software, and judges whether the whole test system normally operates or not according to the image and the equipment running state. And after the sound vibration signal testing system is confirmed to be normal, adjusting the frequency converter, the power amplifier and the signal generator to control the operation condition of vibration excitation equipment in the submersible vehicle structure device in different states, and finally acquiring sound vibration signals and recording data.
The technical problem to be solved by the invention comprises the following steps:
(1) Development of submersible structural device
Firstly, the connection problem of internal equipment and a sensor bus of a submersible structural device and a sound vibration signal testing system is solved; secondly, the size scaling problem of the submersible structural device and the real submersible is solved.
(2) Development of sound vibration simulation cabin in deep environment of large submergence
Firstly, the large diving depth environment simulation cabin is of a steel structure, and medium-high frequency acoustic reverberation in water is serious. Secondly, in order to simulate a deep sea high-pressure large submergence deep environment, sea water is injected into the sound vibration simulation cabin, compressed air is added to simulate the deep sea high-pressure state, and the sealing problem of gas-liquid phases needs to be considered when the covers at two ends of the sound vibration simulation cabin are connected with the simulation cabin main body between the bus outlet of the submersible structural device and the bus interface of the large submergence deep environment sound vibration simulation cabin.
(3) Application of excitation of vibration source of simulation submersible vehicle
Firstly, the problem of how to simulate the excitation force of real submersible power equipment in a submersible structural device; secondly, the problem of how to simulate real public conditions and stably output the exciting force by the exciting equipment.
(4) Arrangement and measurement of a vibroacoustic radiation test system
The problem of circumferential directivity of a hydrophone probe arranged in a sound vibration simulation cabin is solved. And secondly, the connection process of the hydrophone cable inside the sound vibration simulation cabin and the sound vibration signal test system outside the simulation cabin is sealed.
The technical scheme adopted by the invention for solving the technical problem comprises the following steps:
(1) Development of submersible structural device
The submersible structural device is connected with the sound vibration simulation cabin in the large submersible depth environment through a high-pressure sealing pipe, and the excitation equipment in the submersible structural device is connected with the sound vibration signal test system through a bus; the bus outlet of the submersible structure device is connected with the sound vibration simulation cabin through a high-pressure sealing pipe, and the interface is sealed to prevent high-pressure water vapor from entering. The submersible structural device obtains corresponding vibration performance by carrying out scale effect conversion due to an analytic analysis method and other empirical formulas, and the submersible structural device obtained based on the conversion result needs to meet geometric similarity, dynamic similarity and motion similarity under each test working condition, and is subjected to size scaling on the basis.
(2) Development of sound vibration simulation cabin in deep environment of large diving
Big deep environment sound of diving shakes simulation cabin, this cabin sets up to the capsule shape, adopt pressure vessel high strength steel, the sound absorption is laid to the under-deck wall, insulation material, the bottom of simulation cabin adopts steel frame bearing structure with being connected on ground, and set up vibration isolation device on ground and be fixed in ground, and place whole experimental apparatus on the level ground, place dive ware constructional device and test required equipment behind big deep environment simulation under-deck, use the bus export of the cable of the instrument that is used for installing the system and tests to be connected by the flange dish, and sealed processing. In order to achieve enough sealing effect under a large submergence depth environment, the lead-based metal sealing gasket with the same caliber is applied to the matching position of the cabin body and the cabin cover, and the flange bolts are symmetrically fastened by using a pneumatic wrench, so that the pretightening force of each bolt is the same, and the pressure inside the simulation cabin can be borne.
The floating and submerging of the submergence device structure device are adjusted through the pressure control valve 2, the pressure is adjusted to be small when floating, and the pressure is adjusted to be large when submerging. The whole device is provided with 1 pressure control valve 2, and the pressure is automatically cut off when the pressure in the tank exceeds a limited pressure. The arc of the front part of the cabin body is a pressure buffering front-end cabin 1, the pressurizing equipment is connected to the cabin body main body, a buffer area is formed by the front-end cabin 1, and the pressure stability of the test simulation cabin part is guaranteed. The large-submergence-depth environment sound vibration simulation cabin is of a steel structure, so that medium-high frequency acoustic reverberation in water is serious. In order to ensure the near free field characteristic of sound field propagation, a damping material is laid on the inner wall of the simulation cabin.
(3) Application of excitation of vibration source of simulation submersible vehicle
The dynamic vibration excitation system is hermetically arranged on a base of the submersible vehicle structure device, and the tail end of a bus of the dynamic vibration excitation system is connected with the frequency converter and the signal generator to respectively control the size and the form of stable output excitation of the dynamic vibration excitation system.
(4) Arrangement and measurement of a vibroacoustic radiation test system
A high-pressure sealing pipe is adopted to connect between a bus outlet of the submersible structural device and a bus outlet of a sound vibration simulation cabin in a large submersible deep environment so as to ensure that the internal air pressure of the submersible structural device is the same as the external atmospheric pressure of the device. And a polyethylene tetrafluoro sealing gasket is arranged at the interface of the bus outlet and the high-pressure sealing pipe to resist the high pressure outside the pipe so as to achieve the aim of sealing.
Claims (5)
1. A submersible vehicle structure vibration sound radiation testing device for use in a large submersible depth environment is characterized in that: the large submersible deep environment sound vibration simulation cabin is provided with a pressure control valve, a pressure gauge, a first sound vibration simulation cabin bus outlet, a second sound vibration simulation cabin bus outlet, a first water discharge port, a second water discharge port and a hydrophone cable sealing outlet; the underwater vehicle structure device is internally provided with a first excitation device, a second excitation device and a vibration acceleration sensor, buses of the first excitation device, the second excitation device and the vibration acceleration sensor extend out of a bus outlet of the underwater vehicle structure device to be connected with a bus outlet of a first sound vibration simulation cabin and a bus outlet of a second sound vibration simulation cabin, and then are connected with a sound vibration signal test system, hydrophones are arranged in the sound vibration simulation cabin in a large underwater deep environment, and cables of the hydrophones extend out of a cable sealing outlet of the hydrophones and are connected with the sound vibration signal test system.
2. The device for testing the vibration sound radiation of the submersible structure in the large-submersible-depth environment as claimed in claim 1, wherein: the large diving depth environment sound vibration simulation cabin comprises a cabin body and a cabin cover, wherein the cabin cover is connected with the cabin body through a flange and sealed to form a capsule-shaped structure, and damping materials are arranged on the inner wall of the cabin body.
3. The device for testing the vibration sound radiation of the submersible structure in the large-submersible-depth environment as claimed in claim 1, wherein: the bottom of the sound vibration simulation cabin in the large submergence depth environment is fixed on the horizontal ground by adopting a steel frame supporting structure.
4. The device for testing the vibration sound radiation of the submersible structure in the large-submersible-depth environment as claimed in claim 1, wherein: a first excitation equipment base and a second excitation equipment base are arranged in the submersible structural device, the first excitation equipment is installed on the first excitation equipment base, the second excitation equipment is installed on the second excitation equipment base, a ring rib reinforcing structure is arranged on the inner wall of the submersible structural device, and a shell, the ring rib reinforcing structure, the first excitation equipment base and the second excitation equipment base of the submersible structural device are respectively provided with a vibration acceleration sensor.
5. The device for testing the vibration sound radiation of the submersible structure in the large-submersible-depth environment as claimed in claim 1, wherein: seawater is added into the large submersible deep environment sound vibration simulation cabin through the first water outlet and the second water outlet, and compressed air is added into the large submersible deep environment sound vibration simulation cabin through the pressure control valve, so that a large submersible deep high-pressure environment is maintained.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211608273.5A CN115979557A (en) | 2022-12-14 | 2022-12-14 | Submersible vehicle structure vibration sound radiation testing device used in large submersible depth environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211608273.5A CN115979557A (en) | 2022-12-14 | 2022-12-14 | Submersible vehicle structure vibration sound radiation testing device used in large submersible depth environment |
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| CN115979557A true CN115979557A (en) | 2023-04-18 |
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| CN202211608273.5A Pending CN115979557A (en) | 2022-12-14 | 2022-12-14 | Submersible vehicle structure vibration sound radiation testing device used in large submersible depth environment |
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- 2022-12-14 CN CN202211608273.5A patent/CN115979557A/en active Pending
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