Amphibious aircraft lower fuselage wallboard structure water impact test system and method thereof

Abstract

The application belongs to the technical field of landing shock test design of amphibious aircraft lower fuselage wallboard structure, and particularly relates to a landing shock test system and method design of amphibious aircraft lower fuselage wallboard structure, which comprises an in-plane tensile load loading device, an in-plane tensile load loading bolt, a test piece, an in-water impact load equivalent loading device and an in-water impact load equivalent loading actuator cylinder. The in-plane tensile load loading bolt is adjusted to apply the in-plane tensile load to the test piece, so as to simulate the in-plane tensile load received by the test piece. The in-water impact load equivalent loading actuator cylinder is controlled to realize the equivalent loading of the impact load generated by the test piece in the process of the amphibious aircraft landing on water. The loading is accurate, the environmental requirement degree is low, the test is simple, the test cost is low compared with the real scene test, the load control ability is strong, the test risk is low, the safety accidents are not easy to occur, and the success rate is high.

Description

Technical Field

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

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

[0003] Currently, water impact tests on the lower fuselage panel structure of amphibious aircraft mainly adopt real-world scenario tests, which are costly, have weak load control capabilities, pose significant risks, and have a low success rate.

[0004] This application is made in view of the aforementioned technical deficiencies. 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, so as to overcome or mitigate at least one of the known technical defects.

[0006] The technical solution of this application is:

[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 a water impact load equivalent loading device;

[0008] An in-plane tensile load loading device is used to apply in-plane tensile loads to a test specimen, including a base plate, column, C-shaped steel, corner box, and in-plane tensile load loading bolts;

[0009] There are two columns, which are connected to each other on the base plate, and the inner side wall has ribs running inward in the vertical direction;

[0010] There are two pairs of C-shaped steel beams, which are bolted to both sides of the two column ribs. The bolt holes on the two column ribs are horizontally oriented in a racetrack shape.

[0011] There are two pairs of corner boxes, which are connected to the two sides of the two edges of the test piece, and to two pairs of C-shaped steel.

[0012] There are two sets of in-plane tensile load loading bolts, which are connected to the side walls of the two columns respectively. The heads face outwards, and the in-plane tensile load loading bolts connected to one column are divided into two rows, which are connected to the corresponding two C-shaped steels respectively.

[0013] The water-impact load equivalent loading device is used to apply impact load to the test specimen, including a support, a water-impact load equivalent loading actuator, and a punch.

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

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

[0016] The flange is connected to the end of the piston rod of the actuator cylinder, which is subjected to the equivalent loading of water impact load.

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

[0018] According to at least one embodiment of this application, in the above-described amphibious aircraft lower fuselage panel structure water impact test system, the bottom plate is fixed to the bearing trench by anchor bolts.

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

[0020] According to at least one embodiment of this application, in the above-described amphibious aircraft lower fuselage panel structure water impact test system, the top of the two column sidewalls are formed with horizontal end plates connecting the upper ribs.

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

[0022] The reinforcing bars in the middle of the T-beam face upwards, and the bottom edge bars are connected to two horizontal end plates at both ends.

[0023] According to at least one embodiment of this application, in the above-described amphibious aircraft lower fuselage panel structure water impact test system, the in-plane tensile load loading device further includes a diagonal brace.

[0024] There are two diagonal braces, connecting the two columns and the base plate, located behind the test specimen.

[0025] According to at least one embodiment of this application, in the above-described amphibious aircraft lower fuselage panel structure water impact test system, the support has two opposing support plates, and there are support notches above the two support plates. The cylinder of the water impact load equivalent loading actuator is stuck in the two support notches.

[0026] According to at least one embodiment of this application, in the above-mentioned amphibious aircraft lower fuselage panel structure water impact test system, the connecting flange is connected to the end of the piston rod of the water impact load equivalent loading actuator by a thread, the threaded hole is opened in the center of the connecting flange, and an annular boss is designed around the threaded hole.

[0027] The rectangular impact plate is connected to the connecting flange by bolts, and the groove protrusion structure is used for positioning.

[0028] According to at least one embodiment of this application, in the above-described amphibious aircraft lower fuselage panel structure water impact test system, a rubber pad is attached to the side of the rectangular impact plate facing the test piece.

[0029] The rectangular impact plate has four reinforcing ribs on the side facing away from the test piece, extending from the center to the four corners, forming a radial pattern.

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

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

[0032] The high-speed camera device is used to capture and record the deformation of the test specimen during the test. The test specimen is equipped with sensor components, including strain sensors, displacement sensors, and acceleration sensors. The sensor components are connected to a data acquisition device to measure and acquire the dynamic response data of the test specimen.

[0033] On the other hand, a water impact test method for the lower fuselage panel structure of an amphibious aircraft is provided, implemented based on the aforementioned water impact test system for the lower fuselage panel structure of an amphibious aircraft, including:

[0034] Preload verification steps: Using the water impact load equivalent loading device, the test piece is preloaded with impact load by controlling the water impact load equivalent loading actuator. 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. The control parameters of the target impact load loading are verified in this way.

[0035] In-plane tensile load loading procedure: Using an in-plane tensile load loading device, an in-plane tensile load is applied to the test piece by adjusting the in-plane tensile load loading bolts to achieve the target in-plane tensile load.

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

[0037] Dynamic response data acquisition steps: Use a high-speed camera to record the deformation of the test piece during the test, and use sensor components and data acquisition devices to measure and acquire the dynamic response data of the test piece.

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

[0039] This invention provides a water impact testing system and method for the lower fuselage panel structure of an amphibious aircraft. The system includes an in-plane tensile load loading device, which applies an in-plane tensile load to the test piece by adjusting the in-plane tensile load loading bolts, simulating the in-plane tensile load experienced by the test piece. It also includes a water impact load equivalent loading device, which controls the water impact load equivalent loading actuator to achieve equivalent loading of the impact load generated on the test piece during the amphibious aircraft's water landing process. The system is accurate, has low environmental requirements, and is simple to operate. Compared to real-world testing, it offers advantages such as lower testing costs, stronger load control capabilities, lower testing risks, less likelihood of safety accidents, and a higher success rate. Attached Figure Description

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

[0041] Figure 2 These are three views of the in-plane tensile load loading device provided in the embodiments of this application;

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

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

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

[0045] in:

[0046] 1-In-plane tensile load loading device; 2-Equivalent loading device for water-impact load; 3-High-speed camera device; 4-Test specimen;

[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-Support; 22-Equivalent loading actuator for water impact load; 23-Punch;

[0049] 231-Connecting flange; 232-Rectangular impact plate.

[0050] To better illustrate this embodiment, some content in the accompanying drawings may be omitted, enlarged, or reduced. They are for illustrative purposes only and should not be construed as limiting the scope of this application. Detailed Implementation

[0051] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, and other related parts can be referred to the general design.

[0052] Furthermore, unless otherwise defined, the technical or scientific terms used in this application description shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The word "comprising" as used in this application description indicates that the concept preceding the word encompasses the concepts listed following the word and their equivalents, without excluding other related concepts.

[0053] Furthermore, the terms indicating location used in the description of this application are only used to indicate relative directions or positional relationships. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation" and "connection" used in the description of this application should be interpreted broadly. For example, a connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0054] An equivalent water impact test system for aircraft lower fuselage panel structures, such as Figure 1 As shown, it includes an in-plane tensile load loading device 1, a water-impact load equivalent 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 specimen 4 to simulate the in-plane tensile load experienced by the test specimen 4, such as... Figure 2 As shown, it includes a base plate 11, a column 12, a C-shaped steel 13, a corner box 14, an in-plane tensile load loading bolt 15, a T-shaped beam 16, and a diagonal brace 17.

[0056] The base plate 11 can be fixed to the load-bearing trench by anchor bolts. The bolt holes on it can be designed on the front and rear edges and designed to be U-shaped openings.

[0057] There are two columns 12, which are connected to the base plate 11 and distributed near the two side edges. They can be connected by welding. The inner side walls of the two columns 12 have ribs running inward in the vertical direction.

[0058] There are two pairs of C-shaped steel 13, which are bolted to both sides of the two column 12 ribs. The bolt holes on the two column 12 ribs are horizontally oriented like a racetrack. After the bolts are loosened, the C-shaped steel 13 can slide slightly in the horizontal direction.

[0059] There are two pairs of corner boxes 14, which are respectively connected to the two sides of the two edges of the test piece 4, specifically by bolt connection, and connected to two pairs of C-shaped steel 13, specifically by bolt connection.

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

[0061] When applying an in-plane tensile load to the test piece 4 using the in-plane tensile load loading device 1 disclosed in the above embodiment, the bolts on the two uprights 12 ribs can be loosened first. Then, the two sets of in-plane tensile load loading bolts 15 are rotated inward with equal pitch, causing the two pairs of C-shaped steels 13 to slide outward in the horizontal direction. Then, the test piece 4 is stretched outward on both sides through the two diagonal boxes 14, thereby loading 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, the bolts on the two uprights 12 ribs are tightened again to fix the two pairs of C-shaped steels 13, so as to create pre-tensioning conditions for applying water impact load on the test piece 4.

[0062] The in-plane tensile load loading device 1 disclosed in the above embodiment can simulate the application of various forms of loads to the test piece 4 by adjusting the in-plane tensile load loading bolt 15, including no preload, unidirectional tensile load, shear load, etc., which can realistically realize the restoration of the in-plane load of the lower fuselage panel structure during the landing process of the amphibious aircraft, making the test results real and reliable.

[0063] The top of the side walls of the two columns 12 are formed with horizontal end plates that connect to the upper ribs, and two rectangular frames are formed. The two rectangular frames are connected below the horizontal end plates and distributed on both sides of the ribs, forming a stable angular structure.

[0064] The ribs in the middle of the T-beam 16 face upwards, and the bottom edge is connected to two horizontal end plates at both ends. Specifically, they can be connected by bolts, so that the in-plane tensile load loading device 1 presents an overall ring-shaped closed structure to enhance the impact resistance and create stable support conditions for applying water impact loads to the test piece 4.

[0065] There are two diagonal braces 17, which are connected between the two columns 12 and the base plate 11. Specifically, they can be connected by welding. They are located behind the test piece 4 to further enhance the overall impact resistance of the in-plane tensile load loading device 1 and create stable support conditions for applying water impact loads to the test piece 4.

[0066] The in-plane tensile load loading device 1 disclosed in the above embodiments uses a mechanical method to load the test piece 4 with in-plane loads. It does not require the participation of a control system, 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 immersion process. It includes a support 21, a water impact load equivalent loading actuator 22, and a punch 23.

[0068] The bottom of the bracket 21 can be fixed to the bearing trench by anchor bolts. The bolt holes on the bottom can be designed on the front and rear edges and designed to be U-shaped openings.

[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 is connected to the support 21 and is perpendicular to the test piece 4. Specifically, the support 21 can be designed to have two opposing support plates with support notches above the two support plates. The cylinder 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 equivalent loading actuator 22 for water-impact loads, facing the front of the test piece 4. It is the component that directly contacts the test piece 4 when applying the impact load. To ensure sufficient contact with the test piece 4, a spherical connection can be designed between the punch 23 and the end of the piston rod of the equivalent loading actuator 22 for water-impact loads, and a rubber pad can be attached thereon to prevent damage to the test piece 4. Furthermore, it is necessary to ensure the uniformity of the impact load applied to the test piece 4. Therefore, the punch 23 can be designed to include a connecting flange 231 and a rectangular impact plate 232, such as... Figures 3-5 As 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. In order to facilitate disassembly and assembly, the connecting flange 231 can be designed to be connected to the end of the piston rod of the water impact load equivalent loading actuator 22 by thread. The threaded hole is opened in 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 the 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 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 the design utilizes the groove and protrusion structure for positioning. Specifically, the rectangular impact plate 232 can be designed with a circular groove in the center, and the connecting flange 231 can have a circular protrusion in the center that inserts into the circular groove. In order to enhance the strength of the rectangular impact plate 232 structure, four reinforcing ribs are set on the side of the rectangular impact plate 232 facing away from the test piece 4, pointing from the center to the four corners, forming a radial pattern.

[0074] When applying an impact load to the test piece 4 using 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 a servo control device. 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, 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.

[0075] The above-described embodiment discloses an equivalent loading device 2 for water impact load. Considering the characteristics of large magnitude, wide coverage area and uniform distribution of the impact load generated during the water landing process of amphibious aircraft, the equivalent loading actuator 22 for water impact load is used in conjunction with the punch 23 to apply an equivalent impact load to the test piece 4. This can improve the control capability of loading the impact load generated during the water landing process of the aircraft and reduce the difficulty of the test.

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

[0077] Using the aircraft lower fuselage panel structure water impact test system disclosed in the above embodiments, a water impact test of the aircraft lower fuselage panel structure is carried out. The specific steps are as follows.

[0078] The coordination of test state parameter settings, test triggering, and test system is debugged to ensure the effectiveness and reliability of data acquisition during formal testing.

[0079] Pre-loading verification steps: Using the water-impact load equivalent loading device 2, the test piece 4 is pre-loaded with an impact load by controlling the water-impact load equivalent loading actuator 22. 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. This can be obtained by measuring the strain of the test piece 4. This verifies the control parameters of the target impact load loading, which can ensure the accurate loading of the impact load during the subsequent formal loading and avoid accidental damage to the test piece 4.

[0080] In-plane tensile load loading steps: Using the in-plane tensile load loading device 1, the in-plane tensile load is applied to the test piece 4 by adjusting the in-plane tensile load loading bolt 15 to achieve the target in-plane tensile load, which can be obtained by measuring the stress of the test piece 4.

[0081] Water impact load equivalent loading steps: Using the water impact load equivalent loading device 2, the water impact load equivalent loading actuator 22 is controlled according to the control parameters of the target impact load to apply the impact load to the test piece 4.

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

[0083] The above-described embodiment discloses a water impact test system and method for the lower fuselage panel structure of an amphibious aircraft. It is designed with an in-plane tensile load loading device 1, which applies an in-plane tensile load to the test piece 4 by adjusting the in-plane tensile load loading bolt 15, simulating the in-plane tensile load experienced by the test piece 4. It also includes a water impact load equivalent loading device 2, which controls the water impact load equivalent loading actuator 22 to achieve equivalent loading of the impact load generated on the test piece 4 during the amphibious aircraft's water landing process. The system offers advantages such as accurate loading, low environmental requirements, simple testing, lower testing costs, stronger load control capabilities, lower testing risks, reduced likelihood of safety accidents, and higher success rate compared to real-world testing.

[0084] The technical solution of this application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this 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 all fall within the scope of protection of this application.

Claims

1. A water impact test system for the lower fuselage panel structure of an amphibious aircraft, characterized in that, 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 in-plane tensile load to the test piece (4), including the base plate (11), column (12), C-shaped steel (13), corner box (14), and in-plane tensile load loading bolt (15); There are two columns (12), which are connected to the base plate (11) respectively, and the inner side of the side wall has ribs that run inward in the vertical direction; There are two pairs of C-shaped steel (13), which are respectively bolted to both sides of the two column (12) reinforcing bars. The bolt holes on the two column (12) reinforcing bars are in the shape of a racetrack in the horizontal direction. There are two pairs of corner boxes (14), which are connected to the two sides of the two sides of the test piece (4) and to the two pairs of C-shaped steel (13); There are two sets of in-plane tensile load loading bolts (15), which are connected to the side walls of the two columns (12) respectively. The heads face outwards, and the in-plane tensile load loading bolts (15) connected to one column (12) are divided into two rows, which are connected to the corresponding two C-shaped steels (13) respectively. The water-impact load equivalent loading device (2) is used to apply impact load to the test specimen (4), including a bracket (21), a water-impact load equivalent loading actuator (22), and a punch (23); The cylinder of the water impact load equivalent loading actuator (22) is connected to the support (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), facing the front of the test piece (4), and includes a connecting flange (231) and a rectangular impact plate (232); The connecting flange (231) is connected to the end of the piston rod of the water impact load equivalent loading actuator (22); A 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 base plate (11) is fixed to the load-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, The top of the side walls of the two columns (12) are formed with horizontal end plates that connect the upper reinforcing bars; The in-plane tensile load loading device (1) also includes a T-beam (16); The reinforcing bars in the middle of the T-beam (16) face upwards, and the bottom edge bars are connected to two horizontal end plates at both ends.

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) also includes a diagonal brace (17); There are two diagonal braces (17), which are connected between the two columns (12) and the base 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 opposing support plates with support notches above them. The cylinder of the water impact load equivalent loading actuator (22) 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, characterized in that, The connecting flange (231) is connected to the end of the piston rod of the water impact load equivalent loading actuator (22) by thread. The threaded hole is opened in the center of the connecting flange (231) and is designed with an annular boss around the threaded hole. The rectangular impact plate (232) is connected to the connecting flange (231) by bolts, and the groove protrusion structure is used for positioning.

7. The water impact test system for the lower fuselage panel structure of an amphibious aircraft according to claim 6, characterized in that, A rubber pad is attached to the side of the rectangular impact plate (232) facing the test piece (4); The rectangular impact plate (232) has four reinforcing ribs on the side facing away from the test piece (4), which are arranged radially from the center to the four corners.

8. The water impact test system for the lower fuselage panel structure of an amphibious aircraft according to claim 7, characterized in that, The water impact load equivalent loading actuator (22) is connected to the servo control device. The servo control device controls the water impact load equivalent loading actuator (22) to apply the 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, characterized in that, It also includes a high-speed camera device (3); The high-speed camera device (3) is used to capture and record the deformation of the test piece (4) during the test. The test piece (4) is equipped with a sensor assembly, 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 (4).

10. A method for testing the water impact of a lower fuselage panel structure of an amphibious aircraft, implemented based on the water impact testing system for the lower fuselage panel structure of an amphibious aircraft as described in claim 9, characterized in that... include: Preload verification steps: Using the water impact load equivalent loading device (2), the test piece (4) is preloaded with impact load by controlling the water impact load equivalent loading actuator (22). 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. The control parameters of the target impact load loading are verified in this way. In-plane tensile load loading steps: Using the in-plane tensile load loading device (1), the in-plane tensile load is applied to the test piece (4) by adjusting the in-plane tensile load loading bolt (15) to achieve the target in-plane tensile load. Water impact load equivalent loading steps: Using the water impact load equivalent loading device (2), according to the control parameters of the target impact load loading, control the water impact load equivalent loading actuator (22) to apply the impact load to the test piece (4); Dynamic response data acquisition steps: The deformation of the test piece (4) during the test is recorded by a high-speed camera device (3), and the dynamic response data of the test piece (4) is measured and acquired by a sensor assembly and a data acquisition device.

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