A vibrator fixing device and method for vibration and noise testing of anechoic water tanks

Abstract

A vibrator fixing device and method for vibration and noise testing in anechoic tanks, belonging to the field of ship vibration and noise testing technology. This invention solves the problem of the inability to flexibly excite underwater structures in traditional anechoic tank vibration and noise testing. A main support is suspended below a crane hook by several first ropes, and the test model is suspended below the main support by several second ropes. A movable support frame straddles the main support, with both ends fixed to the main support by first bolts. The position of the vibrator in the horizontal direction is adjusted by adjusting the position of the first bolts on the main support. The vibrator is fixed to the bottom of a fixed support, and its position in the depth direction of the anechoic tank is adjusted by several first position adjustment holes on the fixed support. An angle plate is parallel to the movable support frame and magnetically connected to it. The angle plate allows for testing of the radiated noise of the test model at different angles.

Description

Technical Field

[0001] This invention relates to a vibrator fixing device and method for vibration and noise testing of anechoic water tanks, belonging to the field of ship vibration and noise testing technology. Background Technology

[0002] Vibration and noise testing in anechoic water tanks is crucial for understanding the acoustic and vibration response characteristics of structures and controlling structural vibration and noise. Testing in anechoic water tanks reduces background noise interference, simulates free sound field conditions in an infinitely vast natural environment, and minimizes experimental errors. However, structural vibration and noise testing in anechoic water tanks typically requires exciting the test model using a vibrator. Due to environmental limitations, existing vibrator fixing devices are relatively simple, requiring constant adjustments to the model's position to change the excitation measurement points. This is labor-intensive and prone to damaging the model, making flexible adjustment of the excitation point impossible. Furthermore, inaccurate installation height and position of the vibrator not only lead to inaccurate test data but also damage the test equipment and model. Therefore, designing a simple, flexible, and efficient vibrator fixing device for vibration and noise testing in anechoic water tanks is of great significance, allowing for flexible changes in the vibrator position based on the test model's hoisting and measurement point requirements.

[0003] A literature search of existing technologies revealed that the publicly available information related to this invention mainly includes: 1. A vibrator base fixing device (Patent No.: 202221468223.7); 2. A vibrator fixing device (Patent No.: 202022193982.4); 3. A movable modal vibrator fixing device (Patent No.: 200420086169.5).

[0004] A literature search of existing technologies revealed that, in recent years, the publicly available information related to this invention application mainly includes: 1. A vibrator base fixing device (Patent No.: 202221468223.7); 2. A vibrator fixing device (Patent No.: 202022193982.4); 3. A movable modal vibrator fixing device (Patent No.: 200420086169.5).

[0005] Patent application 1 discloses a vibrator base fixing device, belonging to the field of modal testing technology for automobiles and powertrains, solving the problem of difficult vibrator movement and installation. Patent application 2 discloses a vibrator fixing device, belonging to the field of helicopter testing equipment, which has the function of freely adjusting the installation height and angle of the vibrator within a certain range. The above two patent applications have different application fields and different specific structures than this invention, and therefore there are significant differences. Patent application 3 discloses a movable modal vibrator bracket fixing device, enabling modal analysis of large equipment that could previously only be carried out in the laboratory to be performed in the field, expanding the application scope of modal testing, which is significantly different from the application direction of this invention. Summary of the Invention

[0006] The present invention addresses the problem of the inability to flexibly excite underwater structures in traditional vibration and noise testing of anechoic pools, and provides an exciter fixing device and method for vibration and noise testing of anechoic pools.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0008] A vibrator fixing device for vibration and noise testing of an anechoic water tank includes a main support, a movable support frame, a fixed support, an angle plate, several first ropes, and several second ropes. The main support is suspended below a crane hook via the first ropes, and the test model is suspended below the main support via the second ropes. The movable support frame straddles the main support, and both ends of the movable support frame are fixed to the main support via first bolts. The position of the vibrator in the horizontal direction is adjusted by adjusting the position of the first bolts on the main support. The vibrator is fixed to the bottom of the fixed support, and the test model is fixed to the vibrator via a vibration rod. The fixed support is fixed to the movable support frame via second bolts, and the position of the vibrator in the depth direction of the anechoic water tank is adjusted via several first position adjustment holes on the fixed support. The angle plate is parallel to the movable support frame and is magnetically connected to the movable support frame.

[0009] Furthermore, the main support is a rectangular frame structure, which includes two parallel first support rods and two parallel second support rods. Each first support rod has a second position adjustment hole arranged along its length on its side wall, and a first bolt is correspondingly inserted into the second position adjustment hole.

[0010] Furthermore, the second position adjustment hole is an elongated hole.

[0011] Furthermore, the main support is evenly distributed with several lifting rings along its circumference. Each lifting ring has a first lifting hole and a second lifting hole respectively on its upper and lower parts. Several first ropes and several second ropes are connected to the main support through several first lifting holes and several second lifting holes respectively.

[0012] Furthermore, the movable support frame includes two parallel support plates and a connecting plate for connecting the two support plates. Each support plate has two ear plates fixed in the middle along its length direction. The number of the second bolts is four, and they are installed on the two support plates opposite to each other through the four ear plates. Each support plate has an end plate fixed vertically and integrally at both ends, and the end plate has a fixing round hole.

[0013] Furthermore, both first support rods are hollow tubular structures, and each first support rod has a third position adjustment hole along its length on its upper wall. The four end plates are inserted into the two third position adjustment holes in pairs.

[0014] Furthermore, the fixed bracket includes four bracket bodies arranged in a matrix and a fixed base fixed to the bottom of the four bracket bodies. A plurality of first position adjustment holes are respectively opened on the four bracket bodies and are arranged vertically on each bracket body.

[0015] Furthermore, the fixed bracket is also provided with two sets of crossbars, each set of crossbars being fixedly installed between the two bracket bodies.

[0016] Furthermore, the angle disc is sleeved on the outside of the movable support frame.

[0017] A method of using the above-mentioned vibrator fixing device includes the following steps:

[0018] Step 1: The crane lifts the main support using the crane hook and the first rope, and at the same time connects the test model to the main support using the second rope;

[0019] Step 2: Assemble the fixed bracket, vibrator, and vibrator rod;

[0020] Step 3: Adjust the installation position of the fixed support on the movable support frame and the installation position of the movable support frame on the main support frame according to the excitation position of the test model.

[0021] Step 4: Place the test model into the silencing water tank using a crane, turn on the vibrator, and complete the test under the specified working conditions. After a set of working conditions is completed, rotate the main support according to the scale of the angle dial to complete the structural radiation noise test at different angles.

[0022] Step 5: Change the excitation point of the test model according to the test requirements, and repeat steps 3 and 4 to adjust the excitation position to meet the excitation requirements of any measuring point of the test model.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] The present invention has a simple structure, is easy to operate, saves time and effort, and is robust and reliable. Compared with the prior art, it is more suitable for the field needs of vibration and noise testing of anechoic water tanks.

[0025] The exciter fixing device of the present invention can adjust the position of the exciter along the horizontal and depth directions by adjusting the position of the movable support frame on the main support and the position of the fixed support frame on the movable support frame according to the excitation point of the test model. This allows for quick and flexible adjustment of the excitation position of the exciter, thus meeting the condition of excitation from outside the test model for water tank vibration and noise testing.

[0026] During the testing process, test data needs to be collected by setting up hydrophones. By using the scale rotation device of the angle dial, the radiated noise test of the test model at different angles can be completed while reducing the number of hydrophones, effectively solving the problem of the test model's test conditions limitations.

[0027] The angle plate and the movable support frame are connected by magnetic attraction, which facilitates the reuse of the angle plate.

[0028] The exciter fixing device of the present invention is a detachable structure, and the disassembly operation is simple and reusable. That is, the same exciter fixing device can be used when changing different test models, which provides convenient conditions for structural disturbance noise testing. It is of great significance to the field of ship vibration and noise testing and has high economic efficiency. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0030] Figure 2 A three-dimensional structural diagram of the main support frame;

[0031] Figure 3 This is a three-dimensional structural diagram of the movable support frame;

[0032] Figure 4 A three-dimensional structural diagram of the fixed bracket;

[0033] Figure 5 This is a schematic diagram of the three-dimensional structure of the angle disc.

[0034] In the diagram: 1. Main support; 1-1. First support rod; 1-11. Second position adjustment hole; 1-12. Third position adjustment hole; 1-2. Second support rod; 2. Movable support frame; 2-1. Support plate; 2-2. Connecting plate; 2-3. Ear plate; 2-4. End plate; 2-41. Fixing round hole; 3. Fixed support; 3-1. First position adjustment hole; 3-2. Support body; 3-3. Fixed base; 3-4. Crossbar; 4. Angle plate; 5. First rope; 6. Second rope; 7. Crane hook; 8. Test model; 9. Vibrator; 10. Vibration rod; 11. Lifting ring; 11-1. First lifting hole; 11-2. Second lifting hole. Detailed Implementation

[0035] Specific implementation method one: Combining Figure 1 This description of embodiments provides a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] It should be noted that the descriptions of "front," "rear," "left," "right," "inner," "outer," "left side," "right side," "upper part," "lower part," "top," and "bottom" in this invention are defined based on the orientation or positional relationships shown in the accompanying drawings. They are merely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the described structure must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In the description of this invention, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] A vibrator fixing device for vibration and noise testing of an anechoic water tank includes a main support 1, a movable support frame 2, a fixed support 3, an angle plate 4, several first ropes 5, and several second ropes 6. The main support 1 is suspended below a crane hook 7 via several first ropes 5, and a test model 8 is suspended below the main support 1 via several second ropes 6. The movable support frame 2 straddles the main support 1, and both ends of the movable support frame 2 are fixed to the main support 1 by first bolts. The position of the vibrator 9 in the horizontal direction is adjusted by adjusting the position of the first bolts on the main support 1. The vibrator 9 is fixed to the bottom of the fixed support 3, and the test model 8 is fixed to the vibrator 9 by a vibration rod 10. The fixed support 3 is fixed to the movable support frame 2 by second bolts, and the position of the vibrator 9 in the depth direction of the anechoic water tank is adjusted by several first position adjustment holes 3-1 opened on the fixed support 3. The angle plate 4 is parallel to the movable support frame 2, and the angle plate 4 is magnetically connected to the movable support frame 2.

[0039] The main support 1 is a circular frame structure or a rectangular frame structure, preferably a rectangular frame structure, which facilitates hoisting and positioning.

[0040] Both the first rope 5 and the second rope 6 can be steel wire ropes, elastic ropes, or any other ropes capable of lifting, with steel wire ropes being preferred to ensure a more reliable lifting process.

[0041] The vibrator 9 is fixed to the fixed support by the third bolt. The vibrating rod 10 is a threaded rod.

[0042] In this invention, the position between the test model 8 and the main support 1 is relatively fixed by the action of the second rope 6. By adjusting the installation position of the fixed support 3 on the movable support frame 2, the position of the vibrator 9 in the height direction can be adjusted, thereby adjusting the position between the vibrator 9 and the test model 8. The displacement direction of the movable support frame 2 in the horizontal direction is the same as the length direction of the test model 8. By adjusting the position of the movable support frame 2 in the horizontal direction, the position of the vibrator 9 in the horizontal direction can be adjusted, thereby adjusting the connection position between the test model 8 and the vibrator 9.

[0043] The exciter fixing device of the present invention can realize external excitation of large structures.

[0044] The present invention has a simple structure, is easy to operate, saves time and effort, and is robust and reliable. Compared with the prior art, it is more suitable for the field needs of vibration and noise testing of anechoic water tanks.

[0045] The exciter fixing device of the present invention can adjust the position of the exciter 9 in the horizontal and depth directions by adjusting the position of the movable support frame 2 on the main support 1 and the position of the fixed support 3 on the movable support frame 2 according to the excitation point of the test model 8. This allows for quick and flexible adjustment of the excitation position of the exciter 9, thus meeting the condition for excitation from outside the test model 8 in water pool vibration and noise testing.

[0046] During testing, hydrophones are used to collect test data. The rotation mechanism of the angle dial 4 allows for the testing of radiated noise from different angles of the test model 8 while reducing the number of hydrophones required, effectively solving the problem of limitations in the testing conditions of the test model 8. For example, if the test model needs to be tested at 90°, 180°, 270°, and 360°, the original vibrator fixing device would require rotating the hydrophones at these positions, necessitating the placement of four hydrophones. However, with the vibrator fixing device of this invention, only one hydrophone needs to be placed at one angle. After testing the noise at one angle, the main frame can be hoisted using the crane hook 7, and the angle dial 4 can be used to determine the rotation angle, allowing for the next angle's noise test.

[0047] The exciter fixing device of the present invention is a detachable structure, and the disassembly operation is simple and reusable. That is, the same exciter fixing device can be used when changing different test models 8, which provides convenient conditions for structural disturbance noise testing. It is of great significance to the field of ship vibration and noise testing and has high economic efficiency.

[0048] The main support 1 is a rectangular frame structure, comprising two parallel first support rods 1-1 and two parallel second support rods 1-2. Each first support rod 1-1 has a second position adjustment hole 1-11 arranged along its length on its side wall, and a first bolt is inserted into the corresponding second position adjustment hole 1-11. This design allows for position adjustment of the movable support frame 2 along the length of the first support rod 1-1 by adjusting the position of the first bolt within the second position adjustment hole 1-11. The length direction of the two first support rods 1-1 is the same as the length direction of the test model 8. The first support rods 1-1 and second support rods 1-2 are preferably fixed together by welding to form a rectangular frame structure. The number and position of the second position adjustment holes 1-11 on each first support rod 1-1 can be one on one side wall of the first support rod 1-1, or two symmetrically arranged on both side walls of the first support rod 1-1, which facilitates the positioning of the first bolt.

[0049] The second position adjustment hole 1-11 is an elongated hole.

[0050] The main support 1 has a plurality of lifting rings 11 evenly distributed along its circumference. Each lifting ring 11 has a first lifting hole 11-1 and a second lifting hole 11-2 respectively on its upper and lower parts. A plurality of first ropes 5 and a plurality of second ropes 6 are connected to the main support 1 through the respective first lifting holes 11-1 and second lifting holes 11-2. In this design, the number of lifting rings 11, first ropes 5 and second ropes 6 are all the same. Preferably, there are four, which are respectively arranged at the four corner positions of the main support 1. The lifting rings 11 are preferably welded to the main support 1.

[0051] The movable support frame 2 includes two parallel support plates 2-1 and a connecting plate 2-2 for connecting the two support plates 2-1. Each support plate 2-1 has two ear plates 2-3 fixed along its length in the middle. Four second bolts are used, corresponding to the four ear plates 2-3, and are mounted opposite each other on the two support plates 2-1. Each support plate 2-1 has an end plate 2-4 fixed vertically and integrally at both ends, with a fixing hole 2-41 on the end plate 2-4. With this design, the connecting plate 2-2 is welded to the support plate 2-1, preferably with the two connecting plates 2-2 arranged parallel to each other. The two connecting plates 2-2 are preferably located at the two ends of the two support plates 2-1. According to the test requirements of the test model 8, the movable support frame 2 is moved to the designated excitation position of the test model 8 along the length of the first support rod 1-1, and then connected to the first support rod 1-1 through the first bolts and fixing holes 2-41. The four second bolts are correspondingly mounted on the four ear plates 2-3.

[0052] Both first support rods 1-1 are hollow tubular structures. Each first support rod 1-1 has a third position adjustment hole 1-12 along its length on its upper wall. Four end plates 2-4 are inserted into the two third position adjustment holes 1-12 in pairs. This design, using a hollow tubular structure, effectively reduces the overall weight of the device. Inserting the end plates 2-4 into the third position adjustment holes 1-12 further ensures a stable connection. The third position adjustment holes 1-12 are elongated holes. Specifically, the first support rod can be a round tube or a square tube, preferably a square tube, to effectively reduce the structural area occupied. To further ensure the strength of the first support rod 1-1, it can also be a rod-shaped structure, with the third position adjustment holes 1-12 formed on its upper surface and arranged along its length.

[0053] The fixed bracket 3 includes four bracket bodies 3-2 arranged in a matrix and fixed bases 3-3 fixed to the bottom ends of the four bracket bodies 3-2. A plurality of first position adjustment holes 3-1 are respectively formed on the four bracket bodies 3-2, and are vertically arranged on each bracket body 3-2. With this design, the four bracket bodies 3-2 are mounted in pairs on two support plates 2-1, and the height of the fixed bracket 3 is adjusted through the vertically arranged first position adjustment holes 3-1. The first position adjustment holes 3-1 can be through holes or threaded holes. When they are through holes, a nut is used to assist in fixing the position; when they are threaded holes, the position can be fixed directly by tightening a second bolt. Each bracket body 3-2 is a rectangular tubular structure, and the first position adjustment holes 3-1 penetrate through its two opposite sidewalls. By setting the bracket bodies 3-2 as rectangular tubular structures, the overall weight of the fixed bracket 3 is effectively reduced. One end of each bracket body 3-2 near the fixed base 3-3 can also be set as an angle steel structure to further reduce the overall weight of the fixed bracket 3. The fixed base 3-3 has several bolt holes for mounting the vibrator 9, preferably four bolt holes. The fixed base 3-3 is preferably welded to the support body 3-2.

[0054] The fixed bracket 3 is also provided with two sets of crossbars 3-4, each set of crossbars 3-4 being fixedly installed between two bracket bodies 3-2. This design allows the two sets of crossbars 3-4 to act as handrails, facilitating the adjustment of the height of the fixed bracket 3, and consequently, the height of the vibrator 9. The two sets of crossbars 3-4 are preferably arranged symmetrically, with one set fixed between two adjacent bracket bodies 3-2 and the other set fixed between the remaining two adjacent bracket bodies 3-2. Each set of crossbars 3-4 is preferably arranged vertically for easy gripping.

[0055] The angle disc 4 is fitted onto the outside of the movable support frame 2.

[0056] A method of using the above-mentioned vibrator fixing device includes the following steps:

[0057] Step 1: The crane lifts the main support 1 using the crane hook 7 and the first rope 5, and at the same time connects the test model 8 to the main support 1 using the second rope 6.

[0058] Step 2: Assemble the fixed bracket 3, vibrator 9, and vibrating rod 10;

[0059] Step 3: According to the excitation position of the test model 8, adjust the installation position of the fixed bracket 3 on the movable support frame 2 and the installation position of the movable support frame 2 on the main support 1; then fix the fixed bracket 3 to the movable support frame 2 and fix the movable support frame 2 to the main support 1.

[0060] Step 4: Place the test model 8 into the silencing water tank using a crane, turn on the vibrator 9, and complete the test under the specified working conditions. After a set of working conditions tests are completed, rotate the main support 1 according to the scale of the angle plate 4 to complete the structural radiation noise test at different angles; this solves the problem of the test conditions limitation of the test model 8 caused by the limited number of hydrophones arranged in the circumference.

[0061] Step 5: Replace the excitation point of test model 8 according to the test requirements, and repeat steps 3 and 4 to adjust the excitation position so as to meet the excitation requirements of any measuring point of test model 8.

[0062] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A vibrator fixing device for vibration and noise testing of anechoic water tanks, characterized in that: The system includes a main support (1), a movable support frame (2), a fixed support (3), an angle plate (4), several first ropes (5), and several second ropes (6). The main support (1) is suspended below the crane hook (7) by the several first ropes (5), and the test model (8) is suspended below the main support (1) by the several second ropes (6). Through the action of the second ropes (6), the position between the test model (8) and the main support (1) is relatively fixed. The movable support frame (2) straddles the main support frame (1), and both ends of the movable support frame (2) are fixed to the main support frame (1) by first bolts. The position of the vibrator (9) in the horizontal direction is adjusted by adjusting the position of the first bolts on the main support frame (1). The vibrator (9) is fixed to the bottom of the fixed support frame (3). The test model (8) and the vibrator (9) are fixed together by a vibration rod (10). The fixed support frame (3) is fixed to the movable support frame (2) by second bolts, and the fixed support frame (3) is fixed to the movable support frame (2) by openings in the fixed support frame (3). The first position adjustment holes (3-1) on the exciter (9) are used to adjust the position of the exciter (9) along the depth direction of the silencing water tank. The angle plate (4) is erected parallel on the movable support frame (2) and the angle plate (4) is magnetically connected to the movable support frame (2). The test model (8) is placed into the silencing water tank by a crane, the exciter (9) is turned on, and the test under the specified working conditions is completed. After a set of working conditions is completed, the main support (1) is rotated according to the scale of the angle plate (4) to complete the structural radiation noise test under different angles.

2. The exciter fixing device for vibration and noise testing of a silencing water tank according to claim 1, characterized in that: The main support (1) is a rectangular frame structure, which includes two parallel first support rods (1-1) and two parallel second support rods (1-2). Each first support rod (1-1) has a second position adjustment hole (1-11) arranged along its length on its side wall, and a first bolt is inserted into the second position adjustment hole (1-11).

3. The exciter fixing device for vibration and noise testing of a silencing water tank according to claim 2, characterized in that: The second position adjustment hole (1-11) is an elongated hole.

4. A vibrator fixing device for vibration and noise testing of an anechoic water tank according to claim 1, 2, or 3, characterized in that: The main support (1) has several lifting rings (11) evenly distributed around its circumference. Each lifting ring (11) has a first lifting hole (11-1) and a second lifting hole (11-2) respectively on its upper and lower parts. Several first ropes (5) and several second ropes (6) are connected to the main support (1) through several first lifting holes (11-1) and several second lifting holes (11-2).

5. The exciter fixing device for vibration and noise testing of a silencing water tank according to claim 2, characterized in that: The movable support frame (2) includes two parallel support plates (2-1) and a connecting plate (2-2) for connecting the two support plates (2-1). Two ear plates (2-3) are fixed in the middle of each support plate (2-1) along its length. The number of the second bolts is four, and they are installed on the two support plates (2-1) respectively through the four ear plates (2-3). Both ends of each support plate (2-1) are vertically and integrally fixed with end plates (2-4). The end plates (2-4) are provided with fixing round holes (2-41).

6. The exciter fixing device for vibration and noise testing of a silencing water tank according to claim 5, characterized in that: Both first support rods (1-1) are hollow tubular structures. Each first support rod (1-1) has a third position adjustment hole (1-12) on its upper wall along its length. The four end plates (2-4) are inserted into the two third position adjustment holes (1-12) in pairs.

7. The exciter fixing device for vibration and noise testing of a silencing water tank according to claim 1, characterized in that: The fixed bracket (3) includes four bracket bodies (3-2) arranged in a matrix and a fixed base (3-3) fixed at the bottom of the four bracket bodies (3-2). A plurality of first position adjustment holes (3-1) are respectively opened on the four bracket bodies (3-2) and are arranged vertically on each bracket body (3-2).

8. The exciter fixing device for vibration and noise testing of a silencing water tank according to claim 7, characterized in that: The fixed bracket (3) is also provided with two sets of crossbars (3-4), and each set of crossbars (3-4) is fixedly installed between the two bracket bodies (3-2).

9. The exciter fixing device for vibration and noise testing of a silencing water tank according to claim 1, characterized in that: The angle plate (4) is fitted onto the outside of the movable support frame (2).

10. A method of using the vibrator fixing device according to any one of claims 1 to 9, characterized in that: Includes the following steps: Step 1: The crane lifts the main support (1) using the crane hook (7) and the first rope (5), and at the same time connects the test model (8) to the main support (1) using the second rope (6); Step 2: Assemble the fixed bracket (3), vibrator (9) and vibrator rod (10). Step 3: According to the excitation position of the test model (8), adjust the installation position of the fixed bracket (3) on the movable support frame (2) and the installation position of the movable support frame (2) on the main bracket (1); Step 4: Place the test model (8) into the silencing water tank using a crane, turn on the vibrator (9), and complete the test under the specified working conditions. After a set of working conditions tests are completed, rotate the main support (1) according to the scale of the angle plate (4) to complete the structural radiation noise test under different angles. Step 5: Change the excitation point of the test model (8) according to the test requirements, and repeat steps 3 to 4 to achieve the adjustment of the excitation position so as to meet the excitation requirements of any measuring point of the test model (8).

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