A pulsating load test device for multi-degree-of-freedom underwater vehicle model

Abstract

The present invention provides a multi-degree-of-freedom underwater vehicle model pulsating load test device, which belongs to the field of ship and ocean engineering testing technology. The problem that the existing device cannot realize the pulsating load test of the underwater vehicle model is solved. It includes a circulating water tank, an underwater vehicle model, a fairing, a connecting rod, a supporting rod, a positioning iron block and a guide plate. The underwater vehicle model is arranged inside the circulating water tank and the head of the model faces the incoming flow direction of the circulating water tank, and the enclosure faces upward; a plurality of guide plates are arranged at the inlet and outlet ends of the circulating water tank, and the fairing is installed on the enclosure. The immersion depth and pitch angle of the underwater vehicle model are adjusted by adjusting the position of the supporting rod passing through the circular hole on the connecting rod, and the incident flow angle of the underwater vehicle model is adjusted by changing the angle between the supporting rod and the side wall of the circulating water tank. The present invention can complete the pulsating pressure and vibration acceleration test of the underwater vehicle under different working conditions, and provide data support for the study of the pulsating load characteristics of the underwater vehicle.

Description

Technical Field

[0001] The invention belongs to the technical field of ship and ocean engineering testing, and in particular relates to a pulsating load testing device for a multi-degree-of-freedom underwater navigation body model. Background Art

[0002] The vibration and flow-induced noise of underwater vehicles during submersion are of great significance to the study of their concealment and navigation safety. By measuring the pulsating pressure and vibration acceleration response of the underwater vehicle model through the pulsating load test, the formation and propagation law of its flow-induced noise can be analyzed, which is of guiding significance for reducing the flow-induced noise of underwater vehicles and improving their concealment and navigation safety. At the same time, conducting flow-induced tests on underwater vehicles can discover acoustic problems in ship structural design in advance, and provide a good experimental platform and simulation data reference for ship acoustic design.

[0003] Experimental testing plays an irreplaceable role in the fields of underwater navigation body ship type development, acoustic performance analysis, etc. Model testing can verify existing research results and more easily discover problems in the design. On the other hand, it can provide excellent data reference for subsequent simulation design. With the development of computational fluid dynamics (CFD), the simulation of pulsating loads of underwater navigation body models using CFD software has become an effective and low-cost method. The application of relevant simulation software can reproduce the test scene: pre-process the mesh of the fluid area, verify the mesh convergence, set the initial conditions that are consistent with the actual boundary conditions of the test, and perform numerical simulation calculations of pulsating loads. Experimental testing can verify with numerical simulation in both directions, check and correct simulation data, and then optimize the simulation calculation method to accurately find design defects.

[0004] The circulating water tank is a large-scale test equipment composed of an oscillation mechanism, a drive motor control system and a data acquisition system. The operator can send instructions to the drive motor through the flow rate control console to adjust the motor speed, thereby obtaining the required flow rate for flow stimulation testing and realizing the recycling of water in the water tank. The circulating water tank has a series of advantages such as good flow rate control ability and large working section size, and is a commonly used equipment for underwater model testing. Therefore, the development and design of a pulsating load test device for underwater vehicle models based on the circulating water tank has broad practical application value; through a literature search of the prior art, it is found that in recent years, there are few patent documents on pulsating load test devices for underwater structures in circulating water tanks. Therefore, it is necessary to design a multi-degree-of-freedom underwater vehicle model pulsating load test device to solve the above problems. Summary of the invention

[0005] In view of this, the present invention aims to propose a multi-degree-of-freedom underwater vehicle model pulsating load testing device to solve the problem that existing devices cannot realize pulsating load testing of underwater vehicle models.

[0006] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0007] A multi-degree-of-freedom underwater vehicle model pulsating load test device comprises a circulating water tank, an underwater vehicle model, a fairing, a connecting rod, a supporting rod, a positioning iron block and a guide plate, wherein the underwater vehicle model is arranged inside the circulating water tank and the head of the underwater vehicle model faces the incoming flow direction of the circulating water tank, and the enclosure faces upward; a plurality of guide plates are arranged at the liquid inlet end and the liquid outlet end of the circulating water tank, the fairing is installed on the enclosure, and during the test, the fairing is exposed above the water surface;

[0008] Two support rods are provided, the length of the support rods is greater than the width of the circulating water tank, the two support rods are arranged in parallel, two connecting rods are provided, a plurality of circular holes are evenly opened on each connecting rod, the end of each connecting rod is provided with a threaded section, one support rod passes through a circular hole on a connecting rod and then spans the side wall of the circulating water tank, and both ends of each support rod are positioned on the edge of the corresponding side wall of the circulating water tank through a positioning iron block, and the positioning iron block and the edge of the circulating water tank are clamped by a clamp; the center distance d of two adjacent circular holes on the connecting rod satisfies d=L·tanθ, where L is the distance between the two connecting rods, and θ is the minimum pitch angle required for the test;

[0009] Two connecting rod threaded holes are opened at the upper part of the underwater vehicle model, and the two connecting rod threaded holes on the underwater vehicle model are respectively connected to a threaded section of a connecting rod; a plurality of large sensor installation openings are opened at the bottom of the underwater vehicle model, a plurality of pressure sensor threaded holes are arranged on the outer surface of the underwater vehicle model, a plurality of acceleration sensor studs are arranged inside the underwater vehicle model, the pressure sensor and the acceleration sensor are placed inside the underwater vehicle model through the large sensor installation openings, the acceleration sensor is installed on the acceleration sensor studs, the pressure sensor is installed on the pressure sensor threaded holes, and the cables of each sensor pass through the casing and the fairing; a matching curved plate is arranged at each large sensor installation opening of the underwater vehicle model, and a rubber sealing gasket is arranged at the matching curved plate and the corresponding large sensor installation opening;

[0010] The immersion depth and pitch angle of the underwater vehicle model are adjusted by adjusting the position of the support rod passing through the circular hole on the connecting rod, and the flow angle of the underwater vehicle model is adjusted by changing the angle between the support rod and the side wall of the circulating water tank.

[0011] Furthermore, the positioning iron block is provided with a square slot and an arched slot, wherein the square slot passes through the front and rear end faces of the positioning iron block, and the arched slot passes through the left and right end faces of the positioning iron block, wherein the square slot of the fixed iron block is used to engage the side wall of the circulating water tank, and the arched slot is used to accommodate the support rod.

[0012] Furthermore, a plurality of guide plates are arranged longitudinally, and a certain distance is provided between adjacent guide plates, and a plurality of guide plates are positioned at the port of the circulating water tank through a positioning seat at the upper and lower parts.

[0013] Furthermore, the outer edge of the guide plate is a streamlined structure; the cross-sectional shape of the connecting rod is streamlined.

[0014] Furthermore, all pressure sensors and acceleration sensors are evenly distributed on the underwater vehicle model.

[0015] Furthermore, a plurality of threaded holes of pressure sensors are arranged on one side of the underwater vehicle model, and a plurality of studs of acceleration sensors are symmetrically arranged on the other side of the underwater vehicle model.

[0016] Furthermore, a plurality of connection holes are provided on the periphery of the large sensor installation opening, and a plurality of threaded holes are provided on the matching curved plate, and the matching curved plate is fixed to the corresponding large sensor installation opening by screws passing through the threaded holes and the corresponding connection holes.

[0017] Furthermore, the connecting rod is a hollow tube; the supporting rod is a hollow tube.

[0018] Furthermore, the size of the fairing is larger than the size of the hull of the underwater vehicle, threaded holes are provided on the fairing, the fairing is mounted on the hull by screws, and a sealing and waterproof rubber gasket is provided between the fairing and the hull.

[0019] Furthermore, the clamp is a G-type woodworking clamp.

[0020] Compared with the prior art, the multi-degree-of-freedom underwater vehicle model pulsating load testing device created by the present invention has the following beneficial effects:

[0021] (1) The test device created by the present invention can adjust the immersion depth and angle of the underwater vehicle model from multiple degrees of freedom according to the test requirements. It has the characteristics of simple structure and wide application range. It provides an effective means for testing the pulsating load of the underwater vehicle model in a circulating water tank and provides data support for the study of the pulsating load characteristics of the underwater vehicle.

[0022] (2) The device created by the present invention is simple and effective, and can adjust the immersion depth and angle of the model from multiple degrees of freedom according to the actual test environment, thereby improving the convenience of adjusting the working conditions of the underwater vehicle model during the pulsating load test in the circulating water tank device.

[0023] (3) The present invention has a simple structure, is easy to maintain, has good adaptability, and has a wide range of applications. It reduces the difficulty of testing the pulsating load of the underwater vehicle model and improves the testing efficiency of the pulsating load of the underwater vehicle model.

[0024] (4) The present application sets up several guide plates to better regulate the fluid state of the test section and increase the accuracy of the experimental results; a positioning iron block with a limiting function is set at the connection between the support rod and the circulating water tank to limit the displacement of the support rod in the forward and backward directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0026] Figure 1 A schematic diagram of the working state of the pulsating load testing device for a multi-degree-of-freedom underwater vehicle model according to an embodiment of the present invention;

[0027] Figure 2 The assembly diagram of the multi-degree-of-freedom underwater vehicle model pulsating load test device (excluding the circulating water tank) described in the embodiment of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the underwater vehicle model;

[0029] Figure 4 This is a bottom view of the underwater vehicle model;

[0030] Figure 5 A schematic diagram of the structure of the connecting rod in the multi-degree-of-freedom underwater vehicle model pulsating load testing device according to an embodiment of the present invention;

[0031] Figure 6 It is a structural diagram of the matching curved plate;

[0032] Figure 7 It is a schematic diagram of the structure of the G-type woodworking clamp;

[0033] Figure 8 Schematic diagram of the structure of the guide plate.

[0034] Description of reference numerals:

[0035] 1. Underwater vehicle model; 2. Fairing; 3. Connecting rod; 4. Support rod; 5. Positioning iron block; 6. Threaded hole for pressure sensor; 7. Large opening for sensor installation; 8. Threaded hole for connecting rod; 9. Acceleration sensor stud; 10. Circular hole; 11. Threaded section; 12. Matching curved plate; 13. Threaded hole; 14. Rubber sealing gasket; 15. G-type woodworking clamp; 16. Guide plate; 17. Circulating water tank; 18. Shell. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0039] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] like Figure 1-Figure 8As shown, a multi-degree-of-freedom underwater vehicle model pulsating load test device includes a circulating water tank 17, an underwater vehicle model 1, a fairing 2, a connecting rod 3, a supporting rod 4, a positioning iron block 5 and a guide plate 16. The underwater vehicle model 1 is arranged inside the circulating water tank 17, and the head of the underwater vehicle model 1 faces the incoming flow direction of the circulating water tank 17, and the enclosure 18 faces upward; a plurality of guide plates 16 are arranged at the liquid inlet end and the liquid outlet end of the circulating water tank 17, and the fairing 2 is installed on the enclosure 18. During the test, the fairing 2 is exposed to the water surface to prevent the sensor test wire from being impacted by the water flow;

[0041] Two support rods 4 are provided, and the length of the support rods 4 is greater than the width of the circulating water tank 17. The two support rods 4 are arranged in parallel. Two connecting rods 3 are provided, and a plurality of circular holes 10 are evenly provided on each connecting rod 3. The end of each connecting rod 3 is provided with a threaded section 11. After a support rod 4 passes through a circular hole 10 on a connecting rod 3, it spans the side wall of the circulating water tank 17, and both ends of each support rod 4 are positioned on the edge of the corresponding side wall of the circulating water tank 17 through a positioning iron block 5, and the positioning iron block 5 and the edge of the circulating water tank 17 are clamped by a clamp; the clamp is a G-type woodworking clamp 15; the center distance d of two adjacent circular holes 10 on the connecting rod 3 satisfies d=L·tanθ, where L is the distance between the two connecting rods 3, and θ is the minimum pitch angle required for the test;

[0042] Two connecting rod threaded holes 8 are provided at the upper part of the underwater vehicle model 1, and the two connecting rod threaded holes 8 on the underwater vehicle model 1 are respectively connected to a threaded section 11 of a connecting rod 3; a plurality of large sensor installation openings 7 are provided at the bottom of the underwater vehicle model 1, a plurality of pressure sensor threaded holes 6 are provided on the outer surface of the underwater vehicle model 1, a plurality of acceleration sensor studs 9 are provided inside the underwater vehicle model 1, the pressure sensor and the acceleration sensor are placed inside the underwater vehicle model 1 through the large sensor installation openings 7, the acceleration sensor is installed on the acceleration sensor studs 9, the pressure sensor is installed on the pressure sensor threaded holes 6, and the surface of the pressure sensor is flush with the surface of the underwater vehicle model 1, and the cables of each sensor pass through the enclosure 18 and the fairing 2; a matching curved plate 12 is provided at each large sensor installation opening of the underwater vehicle model 1, and a rubber sealing pad 14 is provided at the matching curved plate 12 and the corresponding large sensor installation opening;

[0043] The immersion depth and pitch angle of the underwater vehicle model 1 are adjusted by adjusting the position of the support rod 4 passing through the circular hole 10 on the connecting rod 3, and the flow angle of the underwater vehicle model 1 is adjusted by changing the angle between the support rod 4 and the side wall of the circulating water tank 17.

[0044] The positioning iron block 5 is provided with a square slot and an arched slot, wherein the square slot passes through the front and rear end faces of the positioning iron block 5, and the arched slot passes through the left and right end faces of the positioning iron block 5, wherein the square slot of the fixed iron block is used to engage the side wall of the circulating water tank, and the arched slot is used to accommodate the support rod 4.

[0045] The water flow in the circulating water tank is relatively turbulent. In order to better regulate the fluid state of the test section, several guide plates 16 are arranged longitudinally, and a certain distance is set between adjacent guide plates 16. The outer edge of the guide plate 16 is a streamlined structure; several guide plates 16 are positioned at the port of the circulating water tank 17 through a positioning seat respectively, to increase the accuracy of the experimental results.

[0046] The cross-sectional shape of the connecting rod 3 is streamlined, which reduces the influence of the connecting rod on the test flow field.

[0047] The positions and numbers of the pressure sensor openings and the acceleration sensor studs in the underwater vehicle model pulsating load test device are set according to actual measurement requirements, and the sizes of the pressure sensor threaded holes and the acceleration sensor studs are adjusted according to the actual test sensor models; all pressure sensors and acceleration sensors are evenly distributed on the underwater vehicle model 1; the test model is symmetrical, and the pressure sensor threaded holes 6 and the acceleration sensor studs 9 are respectively arranged on one side of the model

[0048] A plurality of connection holes are arranged on the periphery of the sensor installation large opening 7, and a plurality of threaded holes 13 are arranged on the matching curved plate 12, and the matching curved plate 12 is fixed to the corresponding sensor installation large opening 7 by screws passing through the threaded holes 13 and the corresponding connection holes. Such a design is connected and fixed, and water tightness is guaranteed.

[0049] The connecting rod 3 is made of a hollow tube while ensuring the structural strength, thereby reducing the structural weight; the supporting rod 4 is made of a hollow tube while ensuring the structural strength, thereby reducing the weight of the supporting rod.

[0050] The fairing 2 is larger than the enclosure of the underwater vehicle, a threaded hole 13 is provided on the fairing 2, the fairing 2 is mounted on the enclosure by screws, and a sealing and waterproof rubber gasket is provided between the fairing 2 and the enclosure.

[0051] The test device of the present application enables the underwater vehicle model to meet the test conditions. If the immersion depth of the underwater vehicle model 1 needs to be adjusted, the position of the circular hole 10 through which the support rod 4 passes is changed; if the pitch angle of the underwater vehicle model 1 needs to be adjusted, one support rod remains stationary and the other support rod passes through a different circular hole; if the flow angle of the test model needs to be changed, the angle between the support rod 4 and the side wall of the circulating water tank can be adjusted.

[0052] A testing method for a multi-degree-of-freedom underwater vehicle model pulsating load testing device specifically comprises the following steps:

[0053] (1) Arrangement of sensors: Install the pressure sensor and the acceleration sensor at the predetermined position of the underwater vehicle model 1 through the pressure sensor threaded hole 6 and the acceleration sensor stud 9, apply glue or wrap raw tape on the pressure sensor threaded hole 6 for waterproofing, pass the sensor cable through the casing 18 and the fairing 2, close the sensor installation large opening 7 with screws, and fix the fairing 2 on the casing 18;

[0054] (2) Assembling the test device: a plurality of guide plates 16 are arranged at the liquid inlet and outlet ends of the circulating water tank 17, and the connecting rod 3 is fixed to the underwater vehicle model 1 by using the threaded section 11. The circular hole 10 on the connecting rod 3 should face the side wall of the circulating water tank 17. The support rod 4 passes through the circular hole 10 of the connecting rod 3 and spans the side wall of the circulating water tank 17. The positioning iron block 5 spans the support rod 4 and is placed on the edge of the side wall of the circulating water tank 17. The positioning iron block 5 and the edge of the circulating water tank 17 are clamped by using a G-type woodworking clamp 15. The connecting rod 3 and the support rod 4 are tied and fixed with ropes;

[0055] (3) Start the test: Use the circulating water tank flow rate control console to adjust the flow rate in the circulating water tank 17, and guide the flow through a number of guide plates 16. After the flow rate stabilizes, use the data acquisition instrument and supporting test software to collect data on pulsating pressure and vibration acceleration;

[0056] (4) Adjusting the model position: To change the immersion depth of the underwater vehicle model 1, loosen the G-type woodworking clamp 15, change the position of the support rod 4 passing through the circular hole 10 on the connecting rod 3, and the front and rear support rods 4 pass through the circular holes 10 located at the same height on the connecting rod 3 at the same time; to change the pitch angle of the underwater vehicle model 1, loosen the G-type woodworking clamp 15, keep one support rod 4 in place, and pass the other support rod 4 through a different circular hole 10; to change the flow angle of the underwater vehicle model 1, change the angle between the support rod 4 and the side wall of the circulating water tank 17;

[0057] (5) End of test: After repeating the above steps to complete the measurement task, use the circulating water tank flow rate control console to adjust the flow rate in the circulating water tank 17 to 0, and turn off the flow rate control system after the water flow in the circulating water tank 17 is still;

[0058] (6) Disassembling the test device: After the test is completed, loosen the G-type woodworking clamp 15, lift the support rod 4 to take the underwater vehicle model 1 out of the circulating water tank 17, take out the test sensor, and disassemble the parts of the test device.

[0059] The above disclosed embodiments of the invention are only used to help explain the invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the invention, so that those skilled in the art can understand and use the invention well.

Claims

1. A multi-degree-of-freedom underwater vehicle model pulsating load test device, characterized in that: The invention comprises a circulating water tank (17), an underwater vehicle model (1), a fairing (2), a connecting rod (3), a supporting rod (4), a positioning iron block (5) and a guide plate (16); the underwater vehicle model (1) is arranged inside the circulating water tank (17) and the head of the underwater vehicle model (1) faces the incoming flow direction of the circulating water tank (17), and the enclosure (18) faces upward; a plurality of guide plates (16) are arranged at the liquid inlet end and the liquid outlet end of the circulating water tank (17); the fairing (2) is installed on the enclosure (18); during the test, the fairing (2) is exposed above the water surface; Two support rods (4) are provided, the length of the support rods (4) is greater than the width of the circulating water tank (17), the two support rods (4) are arranged in parallel, two connecting rods (3) are provided, a plurality of circular holes (10) are evenly provided on each connecting rod (3), the end of each connecting rod (3) is provided with a threaded section (11), one support rod (4) passes through a circular hole (10) on a connecting rod (3) and then spans the side wall of the circulating water tank (17), and both ends of each support rod (4) are positioned on the edge of the corresponding side wall of the circulating water tank (17) through a positioning iron block (5), and the positioning iron block (5) and the edge of the circulating water tank (17) are clamped by a clamp; the distance d between the centers of two adjacent circular holes (10) on the connecting rod (3) satisfies d=L·tanθ, wherein L is the distance between the two connecting rods (3), and θ is the minimum pitch angle required for the test; Two connecting rod threaded holes (8) are provided at the upper part of the underwater vehicle model (1), and the two connecting rod threaded holes (8) on the underwater vehicle model (1) are respectively connected to the threaded section (11) of a connecting rod (3); a plurality of sensor installation large openings (7) are provided at the bottom of the underwater vehicle model (1), a plurality of pressure sensor threaded holes (6) are provided on the outer surface of the underwater vehicle model (1), and a plurality of acceleration sensor studs (9) are provided inside the underwater vehicle model (1); the pressure sensor and the acceleration sensor are placed into the underwater vehicle model (1) through the sensor installation large openings (7), the acceleration sensor is installed on the acceleration sensor studs (9), and the pressure sensor is installed on the pressure sensor threaded holes (6), and the cables of each sensor pass through the casing (18) and the fairing (2); a matching curved plate (12) is provided at each sensor installation large opening of the underwater vehicle model (1), and a rubber sealing pad (14) is provided between the matching curved plate (12) and the corresponding sensor installation large opening; The immersion depth and pitch angle of the underwater vehicle model (1) are adjusted by adjusting the position of the supporting rod (4) passing through the circular hole (10) on the connecting rod (3), and the flow angle of the underwater vehicle model (1) is adjusted by changing the angle between the supporting rod (4) and the side wall of the circulating water tank (17).

2. A multi-degree-of-freedom underwater vehicle model pulsating load testing device according to claim 1, characterized in that: The positioning iron block (5) is provided with a square slot and an arched slot, wherein the square slot passes through the front and rear end surfaces of the positioning iron block (5), and the arched slot passes through the left and right end surfaces of the positioning iron block (5), wherein the square slot of the fixed iron block is used to engage with the side wall of the circulating water tank, and the arched slot is used to accommodate the support rod (4).

3. The multi-degree-of-freedom underwater vehicle model pulsating load testing device according to claim 1, characterized in that: A plurality of guide plates (16) are arranged longitudinally, and a certain distance is provided between adjacent guide plates (16). The plurality of guide plates (16) are positioned at the port of the circulating water tank (17) via a positioning seat respectively at the top and the bottom.

4. The multi-degree-of-freedom underwater vehicle model pulsating load testing device according to claim 2, characterized in that: The outer edge of the guide plate (16) is a streamlined structure; the cross-sectional shape of the connecting rod (3) is also streamlined.

5. The multi-degree-of-freedom underwater vehicle model pulsating load testing device according to claim 1, characterized in that: All pressure sensors and acceleration sensors are evenly distributed on the underwater vehicle model (1).

6. The multi-degree-of-freedom underwater vehicle model pulsating load testing device according to claim 5, characterized in that: A plurality of pressure sensor threaded holes (6) are arranged on one side of the underwater vehicle model (1), and a plurality of acceleration sensor studs (9) are symmetrically arranged on the other side of the underwater vehicle model (1).

7. The multi-degree-of-freedom underwater vehicle model pulsating load testing device according to claim 1, characterized in that: A plurality of connection holes are arranged on the periphery of the sensor installation large opening (7), and a plurality of threaded holes (13) are arranged on the matching curved plate (12). The matching curved plate (12) is fixed to the corresponding sensor installation large opening (7) by screws passing through the threaded holes (13) and the corresponding connection holes.

8. The multi-degree-of-freedom underwater vehicle model pulsating load testing device according to claim 1, characterized in that: The connecting rod (3) is a hollow tube; the supporting rod (4) is a hollow tube.

9. The multi-degree-of-freedom underwater vehicle model pulsating load testing device according to claim 1, characterized in that: The size of the fairing (2) is larger than the size of the enclosure of the underwater vehicle. A threaded hole (13) is provided on the fairing (2), and the fairing (2) is installed on the enclosure by screws. A sealing and waterproof rubber gasket is provided between the fairing (2) and the enclosure.

10. A multi-degree-of-freedom underwater vehicle model pulsating load testing device according to any one of claims 1 to 9, characterized in that: The clamp is a G-type woodworking clamp (15).

Images