Amphibious aircraft lower fuselage wall plate structure dampening impact test system and method thereof

Abstract

The invention belongs to the technical field of design of a dampening impact test of a lower fuselage wall plate structure of an amphibious aircraft, and particularly relates to a dampening impact test system and method for the lower fuselage wall plate structure of the amphibious aircraft. An in-plane tensile load is applied to a test piece, the in-plane tensile load borne by the test piece is simulated, a dampening impact load equivalent loading device is used for controlling a dampening impact load equivalent loading actuator cylinder, equivalent loading of the impact load generated by the test piece in the dampening process of the amphibious aircraft is achieved, loading is accurate, and the testing efficiency is improved. And compared with a real scene test, the method has the advantages of low test cost, strong load control capability, low test risk and difficulty in occurrence of safety accidents. And the success rate is high.

Description

Technical Field

[0001] This application belongs to the technical field of the design of the water impact test for the lower fuselage panel structure of an amphibious aircraft, and specifically relates to a water impact test system and method for the lower fuselage panel structure of an amphibious aircraft. Background Art

[0002] When an amphibious aircraft lands on water, that is, during water impact, the lower fuselage panel structure is simultaneously subjected to in-plane tensile loads and impact loads generated during the water impact process.

[0003] Currently, for the water impact test of the lower fuselage panel structure of an amphibious aircraft, real-scene tests are mainly used, which have high test costs, weak load control capabilities, and extremely high risks, resulting in a low test success rate.

[0004] In view of the existence of the above technical defects, this application is proposed. Summary of the Invention

[0005] The purpose of this application is to provide a water impact test system and method for the lower fuselage panel structure of an amphibious aircraft to overcome or mitigate at least one aspect of the known technical defects.

[0006] The technical solution of this application is as follows:

[0007] On the one hand, a water impact test system for the lower fuselage panel structure of an amphibious aircraft is provided, including an in-plane tensile load loading device and an equivalent water impact load loading device;

[0008] The in-plane tensile load loading device is used to apply an in-plane tensile load to the test piece, and includes a bottom plate, columns, C-shaped steels, angle boxes, and in-plane tensile load loading bolts;

[0009] [[ID=3l]]There are two columns, which are connected to the bottom plate relatively, and there are ribs extending inward in the vertical direction on the inner side of the side walls;

[0010] There are two pairs of C-shaped steels, which are respectively connected to both sides of the ribs of the two columns through bolts, and the bolt holes on the ribs of the two columns are in the shape of a horizontal runway;

[0011] There are two pairs of angle boxes, which are respectively connected to both sides of the two sides of the edge of the test piece and to the two pairs of C-shaped steels;

[0012] There are two groups of in-plane tensile load loading bolts, which are respectively connected to the side walls of the two columns, with the heads facing outward, and the in-plane tensile load loading bolts connected to one column are divided into two rows and are respectively connected to the corresponding two C-shaped steels;

[0013] The equivalent water impact load loading device is used to apply an impact load to the test piece, and includes a bracket, an equivalent water impact load loading actuator, and a punch;

[0014] The cylinder body of the equivalent loading actuator for water impact load is connected to the bracket and is perpendicular to the test piece;

[0015] The punch is connected to the end of the piston rod of the equivalent loading actuator for water impact load and is facing the front of the test piece, including a connecting flange and a rectangular impact plate;

[0016] One side of the connecting flange is connected to the end of the piston rod of the equivalent loading actuator for water impact load;

[0017] The rectangular impact plate is connected to the other side of the connecting flange and is parallel to the test piece.

[0018] According to at least one embodiment of the present application, in the water impact test system for the lower fuselage panel structure of the amphibious aircraft, the bottom plate is fixed to the bearing trench through anchor bolts;

[0019] The bottom of the bracket is fixed to the bearing trench through anchor bolts.

[0020] According to at least one embodiment of the present application, in the water impact test system for the lower fuselage panel structure of the amphibious aircraft, horizontal end plates connecting the horizontal ribs are formed at the tops of the side walls of the two columns;

[0021] The in-plane tensile load loading device further includes a T-beam;

[0022] The rib in the middle part of the T-beam faces upward, and the two ends of the bottom flange are connected to the two horizontal end plates.

[0023] According to at least one embodiment of the present application, in the water impact test system for the lower fuselage panel structure of the amphibious aircraft, the in-plane tensile load loading device further includes diagonal braces;

[0024] There are two diagonal braces, which are connected between the two columns and the bottom plate and are located behind the test piece.

[0025] According to at least one embodiment of the present application, in the water impact test system for the lower fuselage panel structure of the amphibious aircraft, there are two opposite support plates on the bracket, and there are support notches above the two support plates, and the cylinder body of the equivalent loading actuator for water impact load is stuck in the two support notches.

[0026] According to at least one embodiment of the present application, in the water impact test system for the lower fuselage panel structure of the amphibious aircraft, the connecting flange is threadedly connected to the end of the piston rod of the water impact load equivalent loading actuator, the threaded hole is opened at the central part of the connecting flange, and an annular boss surrounding the threaded hole is designed;

[0027] The rectangular impact plate is connected to the connecting flange through bolts and is positioned by using the structure of the protruding groove.

[0028] According to at least one embodiment of the present application, in the water impact test system for the lower fuselage panel structure of the amphibious aircraft described above, a rubber pad is pasted on the side of the rectangular impact plate facing the test piece;

[0029] On the side of the rectangular impact plate facing away from the test piece, there are four reinforcing ribs pointing from the central part to the four corner parts, presenting a radial shape as a whole.

[0030] According to at least one embodiment of the present application, in the water impact test system for the lower fuselage panel structure of the amphibious aircraft described above, the water impact load equivalent loading actuator is connected to the servo control device, and the servo control device controls the water impact load equivalent loading actuator to control the water impact load equivalent loading actuator to apply an impact load to the test piece through the punch.

[0031] According to at least one embodiment of the present application, in the water impact test system for the lower fuselage panel structure of the amphibious aircraft described above, it further includes a high-speed camera device;

[0032] The high-speed camera device is used to photograph and record the deformation of the test piece during the test, and a sensor assembly is arranged on the test piece, including a strain sensor, a displacement sensor, and an acceleration sensor. The sensor assembly is connected to a data acquisition device to measure and acquire the dynamic response data of the test piece.

[0033] On the other hand, a water impact test method for the lower fuselage panel structure of an amphibious aircraft is provided, which is implemented based on the above-mentioned water impact test system for the lower fuselage panel structure of an amphibious aircraft, and includes:

[0034] Preloading verification step: Using the water impact load equivalent loading device, through the control of the water impact load equivalent loading actuator, preload the impact load on the test piece, gradually increase the loading curve from a low value, and make the peak value and waveform of the impact load gradually approach the peak value and waveform of the target impact load, so as to verify the control parameters of the target impact load loading;

[0035] In-plane tensile load loading step: Using the in-plane tensile load loading device, through the adjustment of the in-plane tensile load loading bolt, apply an in-plane tensile load to the test piece to reach the target in-plane tensile load;

[0036] Water impact load equivalent loading step: Using the water impact load equivalent loading device, according to the control parameters of the verified target impact load loading, control the water impact load equivalent loading actuator to apply an impact load to the test piece;

[0037] Dynamic response data acquisition step: Using the high-speed camera device to photograph and record the deformation of the test piece during the test, and using the sensor assembly and data acquisition device to measure and acquire the dynamic response data of the test piece.

[0038] This application has at least the following beneficial technical effects:

[0039] A water impact test system and method for the lower fuselage panel structure of an amphibious aircraft are provided. The system employs an in-plane tensile load loading device that applies an in-plane tensile load to a test piece by adjusting an in-plane tensile load loading bolt, simulating the in-plane tensile load experienced by the test piece. Furthermore, a water impact load equivalent loading device controls an actuator to apply the equivalent water impact load to the test piece, achieving an equivalent loading of the impact load generated during the water landing of the amphibious aircraft. The system features accurate loading, low environmental requirements, and simple testing. Compared to real-world testing, the system offers multiple advantages, including low testing costs, strong load control capabilities, low test risks, and a high success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Schematic diagram of a water impact test system for a lower fuselage panel structure of an amphibious aircraft provided in an embodiment of the present application;

[0041] Figure 2 3. It is a three-view diagram of the in-plane tensile load loading device provided in an embodiment of the present application;

[0042] Figure 3 is a schematic diagram of a punch provided in an embodiment of the present application;

[0043] Figure 4 is a cross-sectional view of a punch provided in an embodiment of the present application;

[0044] Figure 5 is a top view of the punch provided in an embodiment of the present application;

[0045] in:

[0046] 1-In-plane tensile load loading device; 2-Water impact load equivalent loading device; 3-High-speed camera device; 4-Test piece;

[0047] 11-base plate; 12-column; 13-C-shaped steel; 14-corner box; 15-in-plane tensile load loading bolt; 16-T-beam; 17-diagonal brace;

[0048] 21- bracket; 22- water impact load equivalent loading actuator; 23- punch;

[0049] 231-connecting flange; 232-rectangular impact plate.

[0050] In order to better illustrate this embodiment, some contents of the drawings may be omitted, enlarged or reduced, which is only used for illustrative purposes and should not be construed as limiting the present application. DETAILED DESCRIPTION

[0051] To make the technical solutions and their advantages of this application clearer, the following will further describe the technical solutions of this application clearly and completely in conjunction with the accompanying drawings. It can be understood that the specific embodiments described herein are only partial embodiments of this application, which are only used to explain this application rather than limit this application. It should be noted that for the convenience of description, only the parts related to this application are shown in the drawings, and other related parts can refer to the general design.

[0052] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application should be the ordinary meanings understood by those of ordinary skill in the art to which this application belongs. The "including" used in the description of this application means that the concept appearing before this word covers the concepts listed after this word and their equivalents, without excluding other related concepts.

[0053] In addition, the words indicating directions used in the description of this application are only used to indicate relative directions or position relationships. When the absolute position of the object being described changes, its relative position relationship may also change accordingly. It should also be noted that unless otherwise clearly specified and limited, the "installation", "connection" and other similar words used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. Those skilled in the art can understand their specific meanings in this application according to the specific situation.

[0054] An equivalent water impact test system for the lower fuselage panel structure of an aircraft, as Figure 1 shown, includes an in-plane tensile load loading device 1, an equivalent water impact load loading device 2, and a high-speed camera device 3.

[0055] The in-plane tensile load loading device 1 is used to apply an in-plane tensile load to the test piece 4 to simulate the in-plane tensile load received by the test piece 4, as Figure 2 shown, and includes a bottom plate 11, columns 12, C-shaped steel 13, angle boxes 14, in-plane tensile load loading bolts 15, T-shaped beams 16, and diagonal braces 17.

[0056] The bottom plate 11 can be fixed on the bearing trench through anchor bolts, and the bolt holes on it can be designed on the front and rear edges and designed in a U-shaped opening.

[0057] There are two columns 12, which are connected to the bottom plate 11 relatively and are distributed near the two side edges, and specifically can be connected by welding. There are ribs on the inner sides of the side walls of the two columns 12 extending inward in the vertical direction.

[0058] There are two pairs of C-shaped steels 13, which are respectively bolted to both sides of the ribs of the two columns 12. The bolt holes on the ribs of the two columns 12 are in the shape of a horizontal runway. After the bolts thereon are loosened, the C-shaped steels 13 can slide slightly in the horizontal direction.

[0059] There are two pairs of angle boxes 14, which are respectively connected to both sides of the two side edges of the test piece 4. Specifically, they can be connected by bolts, and are also connected to the two pairs of C-shaped steels 13. Specifically, they can be connected by bolts.

[0060] There are two groups of in-plane tensile load loading bolts 15, which are respectively connected to the side walls of the two columns 12, with the heads facing outwards. And the in-plane tensile load loading bolts 15 connected to one column 12 are divided into two rows and are respectively connected to the corresponding two C-shaped steels 13.

[0061] When applying the in-plane tensile load to the test piece 4 with the in-plane tensile load loading device 1 disclosed in the above embodiment, the bolts on the ribs of the two columns 12 can be loosened first. Then, rotate the two groups of in-plane tensile load loading bolts 15 inwards with equal pitch, driving the two pairs of C-shaped steels 13 to slide outwards in the horizontal direction. Furthermore, stretch the two sides of the test piece 4 outwards through the two pairs of angle boxes 14 to realize the loading of the in-plane tensile load on the test piece 4. After the in-plane tensile load on the test piece 4 is loaded in place, tighten the bolts on the ribs of the two columns 12 again to fix the two pairs of C-shaped steels 13, so as to create a pre-tension condition for applying the water impact load on the test piece 4.

[0062] The in-plane tensile load loading device 1 disclosed in the above embodiment can simulate and apply various forms of loads to the test piece 4 by adjusting the in-plane tensile load loading bolts 15, including no pre-load, unidirectional tensile load, shear load, etc. It can truly realize the reduction of the in-plane load of the lower fuselage panel structure during the water landing process of the amphibious aircraft, making the test results true and reliable.

[0063] At the top of the side walls of the two columns 12, there are formed horizontal end plates connecting the ribs thereon, and two rectangular frames are formed. The two rectangular frames are connected below the horizontal end plates and are distributed on both sides of the ribs, forming a stable angular structure as a whole.

[0064] The rib in the middle part of the T-shaped beam 16 faces upwards, and the two ends of the bottom flange are connected to the two horizontal end plates. Specifically, they can be connected by bolts, making the in-plane tensile load loading device 1 present an annular closed structure as a whole to enhance the anti-impact ability and create a stable support condition for applying the water impact load on the test piece 4.

[0065] There are two diagonal braces 17, which are connected between the two columns 12 and the bottom plate 11. Specifically, they can be connected by welding and are located behind the test piece 4 to further enhance the anti-impact ability of the in-plane tensile load loading device 1 as a whole and create a stable support condition for applying the water impact load on the test piece 4.

[0066] The in-plane tensile load loading device 1 disclosed in the above embodiment is designed to apply in-plane load to the test piece 4 by mechanical method, without the participation of a control system. It has a simple structure, simple component processing technology, inexpensive materials, and low manufacturing cost.

[0067] The water impact load equivalent loading device 2 is used to apply an impact load to the test piece 4 to simulate the impact load generated during the water impact process, and includes a bracket 21, a water impact load equivalent loading actuator 22, and a punch 23.

[0068] The bottom of the bracket 21 can be fixed on the bearing trench through anchor bolts. The bolt holes at its bottom can be designed on the front-back edges and are designed in a U-shaped opening.

[0069] The water impact load equivalent loading actuator 22 is the power source for applying the impact load to the test piece 4. Its cylinder body is connected to the bracket 21 and is perpendicular to the test piece 4. Specifically, the bracket 21 can be designed to have two opposite support plates, and there are support notches above the two support plates. The cylinder body of the water impact load equivalent loading actuator 22 is stuck in the two support notches.

[0070] The punch 23 is connected to the end of the piston rod of the water impact load equivalent loading actuator 22 and faces the front of the test piece 4. It is the component that directly contacts the test piece 4 when applying the impact load to the test piece 4. To ensure full contact with the test piece 4, the punch 23 can be designed to be spherically connected to the end of the piston rod of the water impact load equivalent loading actuator 22, and a rubber pad can be pasted on it to avoid damaging the test piece 4. In addition, to ensure the uniformity of the impact load applied to the test piece 4, the punch 23 can be designed to include a connecting flange 231 and a rectangular impact plate 232, as Figures 3 - 5 shown.

[0071] One side of the connecting flange 231 is connected to the end of the piston rod of the water impact load equivalent loading actuator 22. For easy disassembly and assembly, the connecting flange 231 can be designed to be threadedly connected to the end of the piston rod of the water impact load equivalent loading actuator 22. The threaded hole is opened at the center of the connecting flange 231, and an annular boss is designed around the threaded hole.

[0072] The rectangular impact plate 232 is connected to the other side of the connecting flange 231 and is parallel to the test piece 4. When an impact load is applied to the test piece 4, it is in direct contact with the test piece 4. It can be designed to have a relatively large area to ensure the uniformity of the impact load applied to the test piece 4, and a rubber pad is pasted on the side facing the test piece 4 to avoid damage to the test piece 4 at the corners.

[0073] The rectangular impact plate 232 and the connecting flange 231 can be connected by bolts, and a structure with a protruding groove is designed for positioning. Specifically, a circular groove can be designed at the center of the rectangular impact plate 232, and a circular protrusion that can be inserted into the circular groove is provided at the center of the connecting flange 231. Moreover, to enhance the strength of the structure of the rectangular impact plate 232, four reinforcing ribs pointing from the center to the four corner parts are provided on the side of the rectangular impact plate 232 facing away from the test piece 4, and the whole is in a radial shape.

[0074] When applying an impact load to the test piece 4 with the water impact load equivalent loading device 2 disclosed in the above embodiment, the water impact load equivalent loading actuator 22 can be connected to the servo control device, and the servo control device controls the water impact load equivalent loading actuator 22 to apply an impact load to the test piece 4 through the punch 23. The loading curve is gradually increased from a low value, so that the peak value and waveform of the impact load gradually approach the peak value and waveform of the target impact load.

[0075] The water impact load equivalent loading device 2 disclosed in the above embodiment considers the characteristics of the impact load generated during the water landing process of an amphibious aircraft, such as large magnitude, wide coverage area, and uniform distribution within the area. The water impact load equivalent loading actuator 22 is used in cooperation with the punch 23 to apply an equivalent impact load to the test piece 4, which can improve the control ability of the impact load applied during the water landing process of the aircraft and reduce the test difficulty.

[0076] The high-speed camera device 3 is used to photograph and record the deformation of the test piece 4 during the test. In addition, during the test, a sensor assembly can be set on the test piece 4, including a strain sensor, a displacement sensor, an acceleration sensor, etc., and the sensor assembly is connected to a data acquisition device to measure and collect the dynamic response data of the test piece 4.

[0077] Using the water impact test system for the lower fuselage panel structure of the aircraft disclosed in the above embodiment, a water impact test for the lower fuselage panel structure of the aircraft can be carried out, and the following steps can be specifically referred to.

[0078] Debug the setting of test state parameters, test triggering, and the coordination of the test system to ensure the effectiveness and reliability of data collection during the formal test.

[0079] Preloading verification steps: Use the equivalent loading device 2 for the water impact load. By controlling the equivalent loading actuator 22 for the water impact load, preload the test piece 4 with the impact load. Gradually increase the loading curve from a low value to make the peak value and waveform of the impact load gradually approach those of the target impact load. This can be obtained by measuring the strain of the test piece 4, so as to verify the control parameters for loading the target impact load. When the subsequent formal loading is carried out, it can ensure the accurate loading of the impact load and avoid accidental damage to the test piece 4.

[0080] In-plane tensile load loading steps: Use the in-plane tensile load loading device 1. By adjusting the in-plane tensile load loading bolt 15, apply an in-plane tensile load to the test piece 4 to reach the target in-plane tensile load. This can be obtained by measuring the stress of the test piece 4.

[0081] Equivalent loading steps for the water impact load: Use the equivalent loading device 2 for the water impact load. According to the control parameters for verifying the loading of the target impact load, control the equivalent loading actuator 22 for the water impact load and apply an impact load to the test piece 4.

[0082] Dynamic response data acquisition steps: Use the high-speed camera device 3 to record the deformation of the test piece 4 during the test process, and use the sensor assembly and data acquisition device to measure and acquire the dynamic response data of the test piece 4.

[0083] The water impact test system and method for the lower fuselage panel structure of the amphibious aircraft disclosed in the above embodiments are designed to use the in-plane tensile load loading device 1 to apply an in-plane tensile load to the test piece 4 by adjusting the in-plane tensile load loading bolt 15 to simulate the in-plane tensile load received by the test piece 4, and use the equivalent loading device 2 for the water impact load to achieve the equivalent loading of the impact load generated during the water landing process of the amphibious aircraft on the test piece 4 through the control of the equivalent loading actuator 22 for the water impact load. The loading is accurate, the environmental requirements are low, the test is simple. Compared with the real-scene test, it has many advantages such as low test cost, strong load control ability, low test risk, and not easy to have safety accidents, and high success rate.

[0084] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings. Those skilled in the art should understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A water impact test system for the lower fuselage panel structure of an amphibious aircraft, characterized in that It includes an in-plane tensile load loading device (1) and a water-impact load equivalent loading device (2). The in-plane tensile load loading device (1) is used to apply an in-plane tensile load to the test piece (4), and includes a bottom plate (11), columns (12), C-shaped steels (13), angle boxes (14), and in-plane tensile load loading bolts (15). There are two columns (12), which are relatively connected to the bottom plate (11), and the inner side of the side wall has ribs extending inward in the vertical direction. There are two pairs of C-shaped steels (13), which are respectively connected to both sides of the ribs of the two columns (12) by bolts, and the bolt holes on the ribs of the two columns (12) are in a horizontal runway shape. There are two pairs of angle boxes (14), which are respectively connected to both sides of the two side edges of the test piece (4) and connected to the two pairs of C-shaped steels (13). There are two groups of in-plane tensile load loading bolts (15), which are respectively connected to the side walls of the two columns (12), with the heads facing outward, and the in-plane tensile load loading bolts (15) connected to one column (12) are divided into two rows and respectively connected to the corresponding two C-shaped steels (13). The water-impact load equivalent loading device (2) is used to apply an impact load to the test piece (4), and includes a bracket (21), a water-impact load equivalent loading actuator (22), and a punch (23). The cylinder body of the water-impact load equivalent loading actuator (22) is connected to the bracket (21) and is perpendicular to the test piece (4). The punch (23) is connected to the end of the piston rod of the water-impact load equivalent loading actuator (22) and faces the front of the test piece (4), and includes a connecting flange (231) and a rectangular impact plate (232). One side of the connecting flange (231) is connected to the end of the piston rod of the water-impact load equivalent loading actuator (22). The rectangular impact plate (232) is connected to the other side of the connecting flange (231) and is parallel to the test piece (4).

2. The water-impact test system for the lower fuselage panel structure of an amphibious aircraft according to claim 1, characterized in that The bottom plate (11) is fixed to the bearing trench by anchor bolts. The bottom of the bracket (21) is fixed to the bearing trench by anchor bolts.

3. The water-impact test system for the lower fuselage panel structure of an amphibious aircraft according to claim 2, characterized in that Horizontal end plates are formed at the tops of the side walls of the two columns (12) to connect the horizontal ends of their ribs. The in-plane tensile load loading device (1) further includes a T-shaped beam (16). The rib in the middle part of the T-shaped beam (16) faces upward, and the two ends of the bottom flange are connected to the two horizontal end plates.

4. The water-impact test system for the lower fuselage panel structure of an amphibious aircraft according to claim 3, characterized in that The in-plane tensile load loading device (1) further includes diagonal braces (17). There are two diagonal braces (17), which are connected between the two columns (12) and the bottom plate (11) and are located behind the test piece (4).

5. The water-impact test system for the lower fuselage panel structure of an amphibious aircraft according to claim 4, characterized in that The bracket (21) has two opposite support plates, and there are support notches above the two support plates. The cylinder body of the equivalent loading actuator (22) for the water impact load is stuck in the two support notches.

6. The water impact test system for the lower fuselage panel structure of an amphibious aircraft according to claim 5, wherein The connecting flange (231) is connected to the end of the piston rod of the water impact load equivalent loading actuator (22) by threads. The threaded hole is opened at the central part of the connecting flange (231), and an annular boss surrounding the threaded hole is designed; The rectangular impact plate (232) is connected to the connecting flange (231) by bolts and positioned by the cooperation of the protruding structure of the groove.

7. The water impact test system for the lower fuselage panel structure of an amphibious aircraft according to claim 6, wherein A rubber pad is pasted on one side of the rectangular impact plate (232) facing the test piece (4); On the side of the rectangular impact plate (232) facing away from the test piece (4), four reinforcing ribs pointing from the central part to the four corner parts are provided, and the whole is in a radial shape.

8. The water impact test system for the lower fuselage panel structure of an amphibious aircraft according to claim 7, wherein The equivalent loading actuator (22) for the water impact load is connected to the servo control device. The servo control device controls the equivalent loading actuator (22) for the water impact load to control the equivalent loading actuator (22) for the water impact load to apply an impact load to the test piece (4) through the punch (23).

9. The water impact test system for the lower fuselage panel structure of an amphibious aircraft according to claim 8, wherein, It further includes a high-speed camera device (3); The high-speed camera device (3) is used to photograph and record the deformation of the test piece (4) during the test. A sensor assembly including a strain sensor, a displacement sensor, and an acceleration sensor is arranged on the test piece (4). The sensor assembly is connected to a data acquisition device to measure and acquire the dynamic response data of the test piece (4).

10. A method for conducting a water impact test on the lower fuselage panel structure of an amphibious aircraft, implemented based on the water impact test system for the lower fuselage panel structure of the amphibious aircraft described in claim 9, characterized in that, It includes: Preloading verification step: Using the equivalent loading device (2) for the water impact load, through the control of the equivalent loading actuator (22) for the water impact load, preloading the impact load on the test piece (4), gradually increasing the loading curve from a low value, so that the peak value and waveform of the impact load gradually approach the peak value and waveform of the target impact load, thereby verifying the control parameters for the loading of the target impact load; In-plane tensile load loading step: Using the in-plane tensile load loading device (1), through the adjustment of the in-plane tensile load loading bolt (15), applying an in-plane tensile load to the test piece (4) to reach the target in-plane tensile load; Equivalent loading step for the water impact load: Using the equivalent loading device (2) for the water impact load, according to the control parameters for verifying the loading of the target impact load, controlling the equivalent loading actuator (22) for the water impact load to apply an impact load to the test piece (4); Dynamic response data acquisition step: Using the high-speed camera device (3) to photograph and record the deformation of the test piece (4) during the test, and using the sensor assembly and the data acquisition device to measure and acquire the dynamic response data of the test piece (4).

Images