Pressurizing device suitable for large tonnage and pressurizing testing method

Abstract

The invention belongs to the technical field of rigidity tests, and particularly discloses a pressurizing device suitable for large tonnage and a pressurizing test method. The device comprises a simulation cylinder, a simulation structural body and an actuating cylinder, the simulation cylinder comprises two semicircular cylindrical tools, one fixed tool is fixed on the supporting platform, the cambered surface of the fixed tool is deviated from the supporting platform, and the movable tool is detachably matched with the fixed tool so as to surround a to-be-tested product; the simulation structure body comprises a shaft core and a sectioning tile, the sectioning tile is detachably arranged on the shaft core in a sleeving mode, and the peripheral size of the sectioning tile is matched with a to-be-tested product so that the to-be-tested product can be borne through sleeving; the two ends of the sectioning tile are sleeved with loading rings respectively, each loading ring is connected with an actuating cylinder, and the actuating cylinders are used for driving the simulation structural body to move downwards through the stroke in the vertical direction in the testing state to be matched with the simulation cylinders to pressurize the product to be tested. According to the scheme, the technical problem of inconsistent stiffness test deformation of large-tonnage multi-point pressurization is solved.

Description

Technical Field

[0001] This invention belongs to the technical field of stiffness testing, specifically relating to a pressurization device and pressurization testing method suitable for large tonnage applications. Background Technology

[0002] Typically, multiple adapters are used to connect and fix the aircraft structure to the cylindrical shell. The overall installation requirements must ensure that the aircraft is stable and reliable inside the cylinder, while also ensuring that it can exit the cylinder smoothly during launch. Therefore, the rigidity of the adapters must meet the usage requirements. Ground tests are often used in engineering to verify the structural design and ensure its safety.

[0003] Typically, ballast tests involve loading at one or more points and monitoring the deformation of the test specimen. However, adapter stiffness tests require both multi-point loading and consistent deformation. Therefore, tooling suitable for stiffness testing is needed, and the test method must be designed and validated. Summary of the Invention

[0004] The purpose of this invention is to provide a pressurization device and pressurization test method suitable for large tonnage, so as to solve the technical problem of inconsistent deformation in stiffness tests of large tonnage multi-point pressurization.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pressurizing device suitable for large tonnage applications includes: a simulated cylinder, a simulated structure, a guiding mechanism, an actuating cylinder, a screw jack, and a support platform. The simulated cylinder includes two semi-circular cylindrical fixtures, wherein a fixed fixture is fixed to the support platform with its arc surface facing away from the support platform, and a movable fixture detachably engages with the fixed fixture to surround the product under test. The simulated structure includes a shaft core and segmented tiles, the segmented tiles being detachably fitted onto the shaft core, and the outer dimensions of the segmented tiles matching the product under test for fitment. The device carries the product under test; loading rings are respectively fitted at both ends of the segmented tiles, and each loading ring is connected to the actuating cylinder. The actuating cylinder is used to drive the simulated structure to move downward through vertical stroke in the test state, and cooperate with the simulated cylinder to pressurize the product under test; the two ends of the shaft are provided with the screw lifts, which are used to carry the simulated structure and the product under test in the non-test state; the guide mechanism is fixed on both sides of the support platform and the fixed fixture, and is used for the installation limit of the movable fixture of the simulated structure and the simulated cylinder.

[0007] Preferably, a displacement gauge mounting hole is provided on one side of the fixed fixture of the simulated cylinder for mounting a displacement gauge to measure the displacement of the simulated cylinder in the test state.

[0008] Preferably, the guide mechanism is a ball joint adjustable device, the guide shaft of the guide mechanism is fixed on the fixture of the simulated cylinder, the joint ball of the guide mechanism is installed on the simulated structure, and the guide shaft extends into the joint ball for installation and positioning.

[0009] Preferably, the guide mechanism further includes a bearing and a bearing housing, the guide shaft is fixed on the bearing housing by the bearing, and the bearing housing fixes the guide shaft in a vertical position on the fixture.

[0010] Preferably, the bearing housing is adjusted based on the support reaction force of the position adjustment bolt acting on the simulated cylinder to ensure the vertical assembly of the guide shaft.

[0011] Preferably, the guide mechanism further includes a mounting bracket, an upper end cover, and a lower end cover. The joint ball is mounted on the mounting bracket and fixed by the upper end cover and the lower end cover. The mounting bracket is fixedly mounted on the simulated structure.

[0012] Preferably, the simulated cylinder is engraved with product size scale lines for aligning and installing the product under test according to the corresponding dimensions.

[0013] Preferably, a product matching pad is provided between the simulated structure and the simulated cylinder to ensure that the product under test is in an initial equilibrium state when not under test.

[0014] Preferably, the fixed fixture and the movable fixture of the simulated cylinder are connected by a locating pin, and the loading ring is fixedly connected to the simulated cylinder by bolts.

[0015] A pressure testing method suitable for high tonnage applications, using the aforementioned pressure testing device suitable for high tonnage applications, includes: placing the product under test on a pad to bring it to an initial equilibrium state and recording the zero displacement; using a screw jack to lift the product under test off the pad and removing the pad; lowering the screw jack so that the actuator cylinder supports the simulated structure and the product under test until the screw jack separates from the shaft of the simulated structure; while controlling the actuator cylinder to return the product under test to its initial equilibrium state, removing the load from the actuator cylinder and recording the test zero position; controlling the two actuator cylinders to be in the same position, performing a pressure test in a continuous loading mode, and collecting and saving the test data.

[0016] A computer-readable storage medium storing a computer program configured to execute the above-described pressure testing method applicable to large tonnages at runtime.

[0017] An electronic device includes a memory and a processor, wherein the memory stores a computer program and the processor is configured to execute the aforementioned pressure testing method applicable to large tonnage through the computer program.

[0018] In this invention, the simulated cylinder comprises two semi-circular cylindrical fixtures. One fixed fixture is fixed to a support platform with its arc surface facing away from the support platform, and the other movable fixture is detachably fitted with the fixed fixture to surround the product under test. The simulated structure includes a shaft core and segmented tiles. The segmented tiles are detachably fitted onto the shaft core, and the outer dimensions of the segmented tiles match the product under test to support it. Loading rings are fitted at both ends of the segmented tiles, and each loading ring is connected to an actuating cylinder. The actuating cylinder, in the test state, drives the simulated structure downward through a vertical stroke to cooperate with the simulated cylinder towards the product under test. The test product is pressurized; both ends of the shaft are equipped with screw lifts to support the simulated structure and the product under test in non-testing states; the guide mechanism is fixed on both sides of the support platform and the fixed fixture, and is used for the installation limit of the simulated structure and the movable fixture of the simulated cylinder. Thus, the simulated structure is driven to pressurize the product under test through the double actuating cylinder, ensuring that the displacement and force load are synchronized. At the same time, the guide mechanism ensures the installation accuracy, realizes the consistency of deformation in the stiffness test of large-tonnage multi-point pressurization, solves the technical problem of inconsistent deformation in the stiffness test of large-tonnage multi-point pressurization, and achieves the technical effect of synchronizing displacement and force load in multi-point pressurization. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a pressurization device suitable for large tonnage in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the installation position of a pad block for a high-tonnage pressurization device according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of a guide mechanism for a pressurizing device suitable for large tonnage in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of a bearing housing suitable for a high-tonnage pressurization device according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic flowchart of a pressure testing method applicable to large tonnage in an embodiment of the present invention. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and are not to a precise scale, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0025] It should be noted that, in order to clearly illustrate the content of this invention, several embodiments are provided to further explain different implementations of the invention. These embodiments are enumerated rather than exhaustive. Furthermore, for the sake of brevity, content mentioned in the preceding embodiments is often omitted in the following embodiments. Therefore, content not mentioned in the later embodiments can be referred to in the preceding embodiments.

[0026] Example 1

[0027] A pressurization device suitable for large tonnage includes: a simulated cylinder, a simulated structure, a guide mechanism, an actuating cylinder, a screw jack, and a support platform;

[0028] The simulated cylinder comprises two semi-circular cylindrical fixtures. One fixed fixture is fixed to a support platform with its arc surface facing away from the platform, while the other movable fixture is detachably fitted with the fixed fixture to surround the product under test. The simulated structure includes a shaft core and segmented tiles. The segmented tiles are detachably fitted onto the shaft core, and their outer dimensions match the product under test to support it. Loading rings are fitted at both ends of the segmented tiles, and each loading ring is connected to an actuating cylinder. In the test state, the actuating cylinder, through vertical stroke, drives the simulated structure downward to cooperate with the simulated cylinder and apply pressure to the product under test. Screw jacks are installed at both ends of the shaft core to support the simulated structure and the product under test in the non-test state. A guiding mechanism is fixed to the support platform and both sides of the fixed fixture, used for limiting the installation of the movable fixture of the simulated structure and simulated cylinder.

[0029] As an optional implementation, the fixed fixture and the movable fixture of the simulated cylinder are connected by a locating pin, and the loading ring is fixedly connected to the simulated cylinder by bolts.

[0030] like Figure 1 As shown, the product under test is fixed to the simulated structure. For large-tonnage products, it is not limited to hoisting the product under test and the simulated structure as a whole onto the fixed fixture located at the bottom of the simulated cylinder. Given the large size and heavy weight of the simulated structure and cylinder, a guiding mechanism is used to assist in the installation to ensure loading and installation accuracy. After aligning the simulated structure and cylinder, the movable fixture of the simulated cylinder is installed, thereby realizing the installation of the product under test.

[0031] Optionally, due to the inconsistency in the size and shape of the products under test, in order to increase the versatility of the pressurizing device, the simulated structure used to support the products under test includes two parts: a fixed-size shaft core and replaceable segmented tiles fitted over the shaft core, together forming the simulated structure. For example... Figure 1 As shown, the segmented tile consists of two coaxial hollow cylinders with different inner diameters and multiple segments connecting the two hollow cylinders. The product to be tested is placed on the outer shell of the segmented tile.

[0032] As an optional implementation, a displacement gauge mounting hole is provided on one side of the fixture of the simulated cylinder for mounting a displacement gauge to measure the displacement of the simulated cylinder in the test state.

[0033] Not limited to, for example Figure 2 As shown, a displacement gauge is installed on one side of the fixed fixture simulating the cylinder to measure the displacement of the cylinder during testing. Specifically, this includes, but is not limited to, recording the position of the product under test in its initial equilibrium state as the zero displacement position to determine the displacement during the testing process.

[0034] As an optional implementation, the guide mechanism is a ball joint adjustable device. The guide shaft of the guide mechanism is fixed on the fixture of the simulated cylinder, and the joint ball of the guide mechanism is installed on the simulated structure. The guide shaft extends into the joint ball for installation and positioning.

[0035] As an optional implementation, the guide mechanism also includes a bearing and a bearing housing, with the guide shaft fixed to the bearing housing by the bearing, and the bearing housing fixing the guide shaft in a vertical position on the fixture.

[0036] As an optional implementation, the bearing housing is positioned based on the reaction force of the position adjustment bolts acting on the simulated cylinder to ensure the vertical assembly of the guide shaft.

[0037] As an optional implementation, the guide mechanism also includes a mounting bracket, an upper end cover, and a lower end cover. The joint ball is mounted on the mounting bracket and fixed by the upper end cover and the lower end cover. The mounting bracket is fixedly mounted on the simulated structure.

[0038] Not limited to, for example Figure 1 As shown, the guiding mechanism is installed at both ends of the fixed fixture on both sides of the simulated cylinder. The four-directional guiding mechanism provides omnidirectional positioning for the simulated structure and the product under test, ensuring the installation accuracy of the product under test. Figure 3As shown, the guiding mechanism includes an upper end cap, a joint ball, a mounting bracket, a lower end cap, a guide shaft, a bearing, and a bearing housing. The guide shaft is fixed to the bearing housing via the bearing. The bearing housing is mounted on the side of the fixture of the simulated cylinder using standard parts. The upper and lower end caps fix the joint ball and are mounted on the simulated structure via the mounting bracket. When installing the simulated structure and the product under test, the guide shaft enters the joint ball to achieve installation limit, ensuring the installation accuracy of the simulated structure and the product under test.

[0039] Furthermore, such as Figure 2 and Figure 4 As shown, the bearing housing is mounted on the simulated cylinder and connected to the cylinder via six threaded holes without any additional holes. These holes serve as position adjustment bolts. The position of the bearing housing is adjusted by the support reaction force generated by the position adjustment bolts on the simulated cylinder, thus ensuring that the guide shaft remains vertical under gravity. Except for the position adjustment threaded holes, the other holes are mounting holes.

[0040] As an optional implementation, product size scale lines are chiseled onto the simulated cylinder for the product under test to be aligned and installed according to the corresponding dimensions.

[0041] Optionally, for products under test of different sizes, when installing them on the simulated structure, aligning with the corresponding scale lines can achieve stable installation of the products under test.

[0042] As an optional implementation, a product matching pad is provided between the simulated structure and the simulated cylinder to ensure that the product under test is in an initial equilibrium state when not under test.

[0043] Optional, such as Figure 2 As shown, a product matching pad is placed between the simulated structure and the simulated cylinder. The matching pad has the same thickness as the actual theoretical thickness, so that the product under test is in an initial equilibrium state.

[0044] In this embodiment, the simulated cylinder includes two semi-circular cylindrical fixtures. One fixed fixture is fixed to a support platform with its arc surface facing away from the support platform, and the other movable fixture is detachably fitted with the fixed fixture to surround the product under test. The simulated structure includes a shaft core and segmented tiles. The segmented tiles are detachably fitted onto the shaft core, and the outer dimensions of the segmented tiles match the product under test to support it. Loading rings are fitted at both ends of the segmented tiles, and each loading ring is connected to an actuating cylinder. The actuating cylinder is used to drive the simulated structure downward through vertical stroke during the test to cooperate with the simulated cylinder. The product under test is pressurized; screw lifts are installed at both ends of the shaft core to support the simulated structure and the product under test in non-testing states; the guide mechanism is fixed on both sides of the support platform and the fixed fixture to limit the installation of the simulated structure and the movable fixture of the simulated cylinder, thereby driving the simulated structure to pressurize the product under test through the double actuating cylinder, ensuring that the displacement and force load are synchronized. At the same time, the guide mechanism ensures the installation accuracy, realizes the consistency of deformation in the stiffness test of large-tonnage multi-point pressurization, solves the technical problem of inconsistent deformation in the stiffness test of large-tonnage multi-point pressurization, and achieves the technical effect of synchronizing displacement and force load in multi-point pressurization.

[0045] Specifically, when using a pressurizing device to perform a pressure test on a product under test, the steps for mounting the product under test on the pressurizing device are not limited to:

[0046] 1. Mount and fix the product to be tested (taking the adapter as an example) on the simulation structure, aligning it with the product size scale lines engraved on the simulation structure;

[0047] 2. The product to be tested and the simulated structure are hoisted together onto the fixed fixture of the simulated cylinder, and the installation is assisted by the guiding mechanism to ensure loading accuracy and installation accuracy;

[0048] 3. After aligning the fixed fixtures of the simulated structure and the simulated cylinder, install the movable fixture of the simulated cylinder. The movable fixture and the fixed fixture of the simulated cylinder are positioned by locating pins.

[0049] 4. Install the actuator;

[0050] 5. Install the screw jack.

[0051] Furthermore, the guiding mechanism is an adjustable device with a ball joint, such as... Figure 2 As shown, it includes an upper end cap, a joint ball, a mounting bracket, a lower end cap, a guide shaft, a bearing, a bearing housing, and standard parts. The specific installation steps are as follows: Assemble the upper end cap, joint ball, mounting bracket, and lower end cap as a single unit, then install the entire assembly onto the simulated structure. The guide shaft will be vertical under gravity. Assemble the bearing and bearing housing as a single unit and then install it onto the simulated cylinder. Regarding the bearing housing, as... Figure 3As shown, there are no holes connecting the six threaded holes to the simulated cylinder; these are mounting holes for the position adjustment bolts. The position of the bearing seat is adjusted by the support reaction force generated by the bolts on the simulated cylinder, and the bearing is vertically assembled with the guide shaft. The remaining ten through holes are mounting holes.

[0052] Taking the adapter as an example, since the adapter is composed of multiple ring-shaped components with inconsistent lengths, product size markings are engraved on the simulated structure and simulated cylinder for higher installation precision. Installation is achieved simply by aligning the corresponding markings. Given that the adapter's inner diameter also varies and it has a variable boss cross-section, to increase the versatility of the pressurizing device, the simulated structure is divided into two parts: a fixed shaft and replaceable segmented tiles, significantly reducing processing costs.

[0053] Meanwhile, a displacement gauge mounting hole is provided at the bottom of the simulated cylinder to facilitate the installation of the displacement gauge for displacement measurement.

[0054] Due to the large size of the tooling, and considering on-site implementation, the fit clearance between the loading ring and the simulated structure was enlarged, and a threaded hole was made on the upper part of the loading ring. After the loading ring was positioned, the bolts were tightened to fix the loading ring.

[0055] The loading ring and the cylinder's double lugs are connected using tapered pins to prevent large load fluctuations during cylinder reversal due to gaps in the connection. The maximum capacity of a single actuator is not limited to 60t, and the total load of two actuators can reach 120t.

[0056] To facilitate adjusting the height of the simulated structure during the experiment, screw lifts were installed on both sides of the simulated structure for precise height adjustment.

[0057] To determine the initial state of the test piece, a matching pad was placed between the simulated structure and the simulated cylinder. The matching pad had the same thickness as the actual theoretical thickness, so that the test product was in a completely initial equilibrium state.

[0058] In this embodiment, the displacement and force load of the two actuators are synchronized through parallel loading of the two actuators, with the error controlled within 2%. Scale lines are engraved on the simulated structure and simulated cylinder to facilitate installation and improve accuracy. A guiding mechanism ensures installation accuracy and improves efficiency. A screw jack allows for precise adjustment of the product's position. Replaceable segmented tiles on the simulated structure increase the versatility of the pressurizing device. The connection between the loading ring and the shaft of the simulated structure uses a clearance fit and bolt fastening method, reducing installation difficulty and improving efficiency. A matching pad is used to accurately position the product in its initial state. A tapered pin connection is used between the loading ring and the loading lugs to prevent load fluctuations caused by installation gaps during cylinder loading reversal. A displacement gauge mounting hole is pre-drilled in the lower part of the simulated cylinder for easy displacement gauge positioning and installation.

[0059] Example 2

[0060] A pressure testing method suitable for large tonnage, such as Figure 5 As shown, this method uses a pressurizing device suitable for large tonnage, including:

[0061] S502, Place the product under test on the pad to bring it to an initial equilibrium state and record the zero displacement.

[0062] S504, using a screw jack to lift the product to be tested to remove it from the pad, and then removing the pad;

[0063] S506, Lower the auger so that the actuator cylinder supports the simulated structure and the product under test until the auger separates from the shaft of the simulated structure;

[0064] S508, while controlling the actuator to return the product under test to its initial equilibrium state, remove the load on the actuator and record the test zero point;

[0065] S510 controls the two actuators to be in the same position, performs pressure testing in continuous loading mode, and collects and saves test data.

[0066] Optionally, the implementation steps of the pressure testing method based on a pressure device suitable for large tonnage are not limited to including:

[0067] S1, place the product on the matching pad. The actuator and the screw jack are both in a free state. The product is in an initial balanced state. Record the zero displacement.

[0068] S2, control the screw jack to lift the product by 0.5mm to 1mm, so that the product is separated from the matching pad, and then remove the matching pad;

[0069] S3, the actuator cylinder bears the weight of the simulated structure and the product, lowers the screw jack to disengage from the shaft of the simulated structure, and allows the simulated structure to move.

[0070] S4 controls the stroke of the actuator cylinder to return it to the zero displacement position, which means returning the product to its initial equilibrium state; at this time, the load on the actuator cylinder is cleared to zero, serving as the zero point for the test loading.

[0071] S5, start the test, control the displacement of both sides of the actuator cylinder to be consistent, collect data in continuous loading mode (without pausing, continuous data acquisition), save the data until the test ends.

[0072] In this embodiment, the displacement and force load of the two actuators are synchronized through parallel loading of the two actuators, with the error controlled within 2%. Taking into full account on-site installation and process implementation, this method allows for rapid and efficient testing, can meet the requirements of large load loading tests for similar products, has strong versatility, and shows good application prospects.

[0073] Example 3

[0074] In another aspect, the present invention provides an electronic device for implementing the above-described pressure testing method applicable to large tonnage, wherein the electronic device is not limited to a terminal device or a server. The electronic device includes, but is not limited to, a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the steps of any of the above-described method embodiments via the computer program.

[0075] Example 4

[0076] In another aspect, a computer program product or computer program is provided, comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the methods provided in various alternative embodiments of the pressure testing method applicable to high tonnage. The computer program is configured to execute the steps in any of the above-described method embodiments during runtime.

Claims

1. A pressurizing device suitable for large tonnage applications, characterized in that, include: Simulated cylinder, simulated structure, guide mechanism, actuator, screw jack, and support platform; The simulated cylinder includes two semi-circular cylindrical fixtures, wherein a fixed fixture is fixed to the support platform and its arc surface faces away from the support platform, and a movable fixture is detachably engaged with the fixed fixture to surround the product to be tested. The simulated structure includes a core and segmented tiles. The segmented tiles are detachably fitted onto the core, and the outer dimensions of the segmented tiles match the product under test so as to support the product under test through the fitting. The two ends of the segmented tile are respectively fitted with loading rings, and each loading ring is connected to the actuating cylinder. The actuating cylinder is used to drive the simulated structure to move downward through vertical stroke in the test state and cooperate with the simulated cylinder to apply pressure to the product under test. The shaft core is equipped with screw lifts at both ends, which are used to support the simulated structure and the product under test in non-testing conditions. The guiding mechanism is fixed on both sides of the support platform and the fixed tooling, and is used for the installation and positioning of the movable tooling of the simulated structure and the simulated cylinder.

2. The pressurizing device suitable for large tonnage as described in claim 1, characterized in that, The simulated cylinder has a displacement gauge mounting hole on one side of the fixed fixture for mounting a displacement gauge to measure the displacement of the simulated cylinder in the test state.

3. The pressurizing device suitable for large tonnage as described in claim 1, characterized in that, The guiding mechanism is a ball joint adjustable device. The guide shaft of the guiding mechanism is fixed on the fixture of the simulated cylinder. The joint ball of the guiding mechanism is installed on the simulated structure, and the installation is limited by the guide shaft extending into the joint ball.

4. The pressurizing device suitable for large tonnage as described in claim 3, characterized in that, The guiding mechanism also includes a bearing and a bearing housing. The guide shaft is fixed on the bearing housing by the bearing, and the bearing housing fixes the guide shaft in a vertical position on the fixed fixture.

5. The pressurizing device suitable for large tonnage as described in claim 4, characterized in that, The bearing housing is adjusted based on the reaction force of the position adjustment bolts acting on the simulated cylinder to ensure the vertical assembly of the guide shaft.

6. The pressurizing device suitable for large tonnage as described in claim 3, characterized in that, The guiding mechanism also includes a mounting bracket, an upper end cover, and a lower end cover. The joint ball is mounted on the mounting bracket and fixed by the upper end cover and the lower end cover. The mounting bracket is fixedly mounted on the simulated structure.

7. The pressurizing device suitable for large tonnage as described in claim 6, characterized in that, The simulated cylinder is engraved with product size scale lines, which are used to align and install the product under test according to the corresponding size.

8. The pressurizing device suitable for large tonnage as described in claim 1, characterized in that, A product matching pad is provided between the simulated structure and the simulated cylinder to ensure that the product under test is in an initial equilibrium state when not under test.

9. The pressurizing device suitable for large tonnage as described in claim 1, characterized in that, The fixed and movable fixtures of the simulated cylinder are connected by a positioning pin, and the loading ring is fixedly connected to the simulated cylinder by bolts.

10. A pressure testing method suitable for large tonnage applications, characterized in that, Using the pressurization device suitable for large tonnage as described in any one of claims 1 to 9, comprising: Place the product under test on the pad to bring it into initial equilibrium and record the zero displacement. Use a screw jack to lift the product to be tested to remove it from the pad, and then remove the pad. Lower the auger so that the actuator cylinder supports the simulated structure and the product under test until the auger separates from the shaft of the simulated structure; While controlling the actuator to return the product under test to its initial equilibrium state, the load on the actuator is removed and the test zero point is recorded; The two actuators are kept in the same position to perform a pressure test in a continuous loading mode and the test data is collected and saved.

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