Structural rigidity testing method, system and device and medium

Abstract

The invention discloses a structural rigidity testing method, system and device and a medium, and relates to the technical field of testing equipment. The testing method comprises the steps that the same tensile machine is controlled to load two loaded objects in sequence according to the same loading mode, the displacement of the tensile machine and the displacement of the loaded objects are obtained in each loading process, the two loaded objects comprise the same testing rack, and the testing rack is used for testing the displacement of the tensile machine and the displacement of the loaded objects. Only one loaded object comprises a tested structure located above the test bench. And obtaining the deformation of the tested structure according to the displacement difference obtained in each loading process, and calculating the rigidity of the tested structure. Through twice loading, at least partial deformation of the tensile machine and the test bench can be deducted, the rigidity of the tested structure can be calculated more accurately, and the problems that the rigidity test of a high-rigidity structure is inaccurate and the test result difference between different tensile machines is large can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of testing equipment, and in particular to a structural stiffness testing method, system, device and medium. Background Art

[0002] For structures with relatively high stiffness under test, when using a tensile testing machine to perform stiffness (specifically bending stiffness) test, due to the high stiffness of the structure under test itself, the total deformation of the structure under test is relatively small during the loading process. However, the deformation of structures such as the tensile machine beam and the test bench in the tensile testing machine during the loading process is relatively large. When the stiffness of the structure under test is high and is at the same order of magnitude as the stiffness of the test bench and the tensile machine beam, the deformation measured by the tensile testing machine sensor during the loading process of the tensile testing machine includes the sum of the deformations of the structure under test, the test bench and the tensile testing machine. Therefore, the final measured structural stiffness of the structure under test is lower than the actual value, and the higher the stiffness of the structure under test, the greater the deviation.

[0003] In addition, when different tensile testing machines are used to test the stiffness of the same structure under test, due to the difference in stiffness between the tensile testing machines, the structures tested by different tensile testing machines will also be different. At present, when testing the stiffness of a certain structure, two tensile testing machines are used for testing respectively, and the results sometimes differ by more than 50%.

[0004] Therefore, how to solve the problem of inaccurate stiffness testing of high-rigidity structures and large differences in test results between different tensile testing machines is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a structural stiffness testing method and a testing system, a testing device and a computer-readable storage medium that can implement the above-mentioned testing method, which can solve the problems of inaccurate stiffness testing of high-rigidity structures and large differences in test results between different tensile testing machines.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A structural stiffness testing method, comprising:

[0008] Controlling the same tensile testing machine to load two loaded objects in sequence in the same loading manner, and obtaining the displacement of the tensile testing machine and the loaded objects during each loading process;

[0009] Wherein, both of the two loaded objects include the same test bench, and only one of the loaded objects includes a structure under test located above the test bench;

[0010] The deformation of the structure under test is obtained according to the difference in displacement obtained during each loading process, and the stiffness of the structure under test is calculated.

[0011] Preferably, the controlling of the same tensile testing machine to sequentially load two loaded objects in the same loading manner, when loading the loaded object that does not include the structure to be tested, comprises:

[0012] Controlling the pressure structure of the tensile machine to contact the base structure of the test bench and perform loading;

[0013] The test bench includes the base structure and a plurality of supporting structures fixed above the base structure, and the top of the supporting structure is used to support the structure under test.

[0014] Preferably, in controlling the same tensile testing machine to load two loaded objects in sequence in the same loading manner, the loaded objects that do not include the structure to be tested include a pressure-bearing structure, and the loading process includes:

[0015] Controlling the pressure-applying structure of the tensile machine to contact the pressure-bearing structure on the top of the test bench and apply loading;

[0016] The pressure-bearing structure can be detachably placed on the top of the test bench, and the displacement of the pressure-bearing structure is less than a preset threshold.

[0017] Preferably, the stiffness of the pressure-bearing structure is greater than the maximum stiffness of the test bench and the tensile machine.

[0018] Preferably, the stiffness of the pressure-bearing structure is greater than N times the estimated stiffness of the measured structure, where N is greater than 1.

[0019] Preferably, after obtaining the displacement of the tensile machine and the loaded object in each loading process, and before obtaining the deformation of the measured structure according to the difference in the displacement obtained in each loading process, the method further includes:

[0020] During each loading process, a relationship curve between the displacements of the tensile machine and the loaded object and the load applied by the tensile machine is obtained.

[0021] A structural stiffness testing system, comprising:

[0022] A loading module, used to control the same tensile testing machine to load two loaded objects in sequence in the same loading mode, and obtain the displacement of the tensile testing machine and the loaded objects during each loading process;

[0023] Wherein, both of the two loaded objects include the same test bench, and only one of the loaded objects includes a structure under test located above the test bench;

[0024] The calculation module is used to obtain the deformation of the structure under test according to the difference in displacement obtained during each loading process, and calculate the stiffness of the structure under test.

[0025] Preferably, in the loading module, the controlling of the same tensile machine to sequentially load two loaded objects in the same loading manner, when the loading is performed on the loaded object that does not include the structure to be tested, comprises:

[0026] Controlling the pressure structure of the tensile machine to contact the base structure of the test bench and perform loading;

[0027] The test bench includes the base structure and a plurality of supporting structures fixed above the base structure, and the top of the supporting structure is used to support the structure under test.

[0028] A structural stiffness testing device comprises: a memory for storing a computer program; and a processor for implementing the steps of the structural stiffness testing method as described above when executing the computer program.

[0029] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the structural stiffness testing method are implemented.

[0030] The structural stiffness testing method provided by the present invention comprises: controlling the same tensile testing machine to load two loaded objects in sequence according to the same loading method, and obtaining the displacement of the tensile testing machine and the loaded objects during each loading process, wherein the two loaded objects both include the same test bench, and only one of the loaded objects includes a structure to be tested located above the test bench; obtaining the deformation of the structure to be tested according to the difference in displacement obtained during each loading process, and calculating the stiffness of the structure to be tested.

[0031] By loading the test equipment consisting of a tensile testing machine and a test bench separately, and loading it twice after placing the structure to be tested on the test bench, at least part of the deformation of the tensile testing machine and the test bench can be deducted, and the deformation of the structure to be tested can be determined more accurately, thereby being able to more accurately calculate the stiffness of the structure to be tested, which can solve the problems of inaccurate stiffness testing of high-rigidity structures and large differences in test results between different tensile testing machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 The overall structure diagram of the tensile machine and the test bench in the specific embodiment 1 of the test method provided by the present invention;

[0034] Figure 2 A partial structural diagram of a tensile machine and a test bench during testing in a specific embodiment 1 of the test method provided by the present invention;

[0035] Figure 3 A structural diagram of a specific embodiment 1 of the test method provided by the present invention during empty loading;

[0036] Figure 4 This is a structural diagram of a specific embodiment 1 of the test method provided by the present invention when it is formally loaded;

[0037] Figure 5 A loading curve diagram of a specific embodiment 1 of the test method provided by the present invention during empty loading;

[0038] Figure 6 A loading curve diagram of a specific embodiment 1 of the test method provided by the present invention during formal loading;

[0039] Figure 7 This is a flow chart of a specific embodiment 1 of the testing method provided by the present invention;

[0040] Figure 8 This is a structural diagram of the specific embodiment 2 of the test method provided by the present invention during empty loading.

[0041] Reference numerals:

[0042] Tensile machine 1, tensile machine crossbeam 11, tensile machine sensor 12, pressure structure 13, tensile machine platform 14;

[0043] Test bench 2, base structure 21, support structure 22, pressure bearing structure 23, transmission structure 24;

[0044] Structure under test3. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The core of the present invention is to provide a structural stiffness testing method, a testing system, a testing device and a computer-readable storage medium, which can solve the problems of inaccurate stiffness testing of high-rigidity structures and large differences in test results between different tensile testing machines.

[0047] A specific embodiment 1 of the method for testing structural rigidity provided by the present invention is as follows: Figures 1 to 7 As shown, the following steps are included:

[0048] S1: Controlling the same tensile testing machine 1 to load two loaded objects in sequence in the same loading manner, and obtaining the displacements of the tensile testing machine 1 and the loaded objects during each loading process.

[0049] The tensile machine 1 directly contacts the top of the object to be loaded through the pressure structure 13 at its end. Both of the two loaded objects include the same test bench 2, which is used to support the structure to be tested 3, and only one of the loaded objects includes the structure to be tested 3 located on the test bench 2. The loading performed by the tensile machine 1 on the loaded object including the structure to be tested 3 is formal loading, while the loading performed on the other loaded object is empty loading.

[0050] The loading order of the two loaded objects is not limited, and S11 and S12 can be performed in sequence. S11: Control the tensile machine 1 to load the loaded object excluding the measured structure 3; S12: Control the same tensile machine 1 to load the loaded object including the measured structure 3 in the same loading manner. In other embodiments, S11 and S12 can also be swapped.

[0051] Among them, the tensile machine 1 has a tensile machine sensor 12, which specifically includes a force sensor and a displacement sensor. In the process of the pressure structure 13 loading the loaded object, the force sensor in the tensile machine 1 can detect the force signal or load signal in the loading process, and the displacement sensor in the tensile machine 1 can detect the displacement of the tensile machine 1 and the loaded object, specifically the superimposed displacement of the tensile machine 1 part below the displacement sensor and the loaded object. Of course, in other embodiments, the force detection device and the displacement detection device can also be additionally provided as detection devices of related variables outside the tensile machine 1.

[0052] The displacement of the tensile machine 1 and the loaded object is obtained during each loading process. Specifically, the displacement of the tensile machine 1 is the displacement of the structure between the position where the displacement sensor is set on the tensile machine 1 and the position where it contacts the loaded object.

[0053] The test bench 2 mainly includes a three-point bending test bench or a four-point bending test bench. The test bench includes a base structure 21 and a plurality of support structures 22 fixed on the base structure 21, such as Figure 4 In the test bench based on four-point bending shown, four support structures 22 are provided, while in the three-point bending test, two support structures 22 are provided.

[0054] During formal loading, the structure 3 to be tested is placed on the top of the test bench 2, specifically the top of the support structure 22, and the pressure structure 13 applies a certain normal pressure to the center of the structure 3 to be tested. Specifically, the pressure structure 13 can contact the structure 3 to be tested, and in the four-point bending test bench 2, as shown in FIG. Figure 5 As shown, during formal loading, the loaded object may also include a transfer structure, which is not connected to the pressure structure and the structure under test, but is only placed on the structure under test. The pressure structure 13 may contact the transfer structure 24, and press down the transfer structure 24, the structure under test 3 and the test bench 2 in turn. The transfer structure 24 may be used to simulate the actual load action area and improve the accuracy of the detection.

[0055] S2: Obtain the deformation of the measured structure 3 according to the difference in displacement obtained during each loading process, and calculate the stiffness of the measured structure 3.

[0056] In this embodiment, by loading the test equipment composed of the tensile testing machine 1 and the test bench 2 separately, and loading the structure to be tested 3 after placing it on the test bench 2, at least part of the deformation of the tensile testing machine 1 and the test bench 2 can be deducted, and the deformation of the structure to be tested 3 can be determined more accurately, so that the stiffness of the structure to be tested 3 can be calculated more accurately, which can solve the problems of inaccurate stiffness testing of high-rigidity structures and large differences in test results between different tensile testing machines 1.

[0057] Further, in S1, when loading the loaded object that does not include the structure to be tested 3, it includes:

[0058] The pressure structure 13 of the tensile machine 1 is controlled to contact the base structure 21 of the test bench 2 and perform loading.

[0059] Based on the size relationship between the existing test bench 2 and the pressure structure 13, as shown in FIG. Figure 3As shown, the pressure structure 13 can contact the top surface of the base structure 21 through the space between the supporting structures 22, without the aid of other external equipment, and can be directly loaded with the help of the tensile machine 1 and the test bench 2. At least the test results of the tensile machine 1 and the base structure 21 in the test bench 2 on the stiffness of the structure 3 under test can be eliminated, and the operation is convenient.

[0060] Furthermore, in order to facilitate the calculation of the stiffness of the structure 3 under test, after obtaining the displacement of the tensile machine 1 and the loaded object during each loading process in S1, and before S2, it also includes:

[0061] During each loading process, a relationship curve between the displacements of the tensile machine 1 and the object being loaded and the load applied by the tensile machine 1 is obtained.

[0062] Among them, Figure 5 As shown in FIG. 6 , it is a load-displacement relationship curve diagram obtained when the loaded object does not include the structure 3 under test and is loaded by the tensile machine 1 without loading, and as shown in FIG. 7 , it is a load-displacement relationship curve diagram obtained when the loaded object includes the structure 3 under test and is loaded by the tensile machine 1. Based on the fitted curve diagram, it is more intuitive and convenient to select the corresponding load and displacement for calculating to obtain the stiffness of the structure 3 under test.

[0063] Among them, in S2, the deformation of the measured structure 3 is obtained according to the difference in displacement obtained in each loading process, and the stiffness of the measured structure 3 is calculated, which can be specifically achieved by the following formula:

[0064]

[0065] Where:

[0066] K: stiffness of the structure 3 under test;

[0067] F1 and F2: two loads during the empty loading and formal loading process;

[0068] D1: displacement corresponding to F1 obtained during formal loading;

[0069] D2: displacement corresponding to F2 obtained during the formal loading process;

[0070] d1: displacement corresponding to F1 obtained during empty loading;

[0071] d2: Displacement corresponding to F2 obtained during empty loading.

[0072] Of course, in other embodiments, the load-displacement relationship curve may not be fitted. During the loading process, only the displacements during the empty loading and formal loading processes under the same selected load conditions may be directly obtained for calculation.

[0073] In addition, different from the above embodiment, in the specific embodiment 2, please refer to Figure 8 In S1, when the object to be loaded does not include the structure to be tested 3, that is, the process of empty loading includes:

[0074] The pressure-applying structure 13 of the tensile machine 1 is controlled to contact the pressure-bearing structure 23 on the top of the test bench 2 and to perform loading.

[0075] Among them, the pressure-bearing structure 23 can be detachably placed on the top of the test bench 2, and the top of the test bench 2 is the top of the supporting structure 22. During the formal loading process, the pressure-bearing structure 23 can be removed, and then the structure to be tested 3 can be placed on the top of the supporting structure 22, which will not affect the implementation of formal loading.

[0076] In this empty loading process, the pressure-bearing structure 23 is pressed on the top of all the supporting structures 22 at the same time, so as to fully simulate the situation in which the tested structure 3 covers the supporting structure 22 during the formal loading process.

[0077] By limiting the displacement of the pressure-bearing structure 23 to be less than a preset threshold value (preferably 0, or a value close to 0), the influence of the displacement of the pressure-bearing structure 23 on the displacement result detected in the empty loading can be eliminated. In order to achieve that the displacement of the pressure-bearing structure 23 is less than the preset threshold value, specifically, when the pressure-bearing structure 23 is selected, the stiffness of the pressure-bearing structure 23 can be greater than the maximum stiffness of the test bench 2 and the tensile machine 1. Compared with the stiffness of the test bench 2 and the tensile machine 1, the stiffness of the structure under test 3 is easier to estimate, for example, based on experience, or directly calculating the stiffness value through formal loading test as the estimated stiffness value of the structure under test 3. In fact, the stiffness of the tensile machine 1 and the test bench 2 is usually lower than the stiffness of the structure under test 3, or is at the same order of magnitude as the stiffness of the structure under test 3. An easier way to select the pressure-bearing structure 23 is that the stiffness of the pressure-bearing structure 23 is greater than N times the estimated stiffness value of the structure under test 3, where N is greater than 1. To ensure that the stiffness of the pressure-bearing structure 23 is significantly higher than that of the structure under test 3, preferably, N ≥ 50.

[0078] In this embodiment, a pressure-bearing structure 23 is added to the test bench 2 to assist in empty loading. The pressure-applying structure 13 contacts the pressure-bearing structure 23, loads the pressure-bearing structure 23, and transfers the load to the base structure 21 via the supporting structure 22, so that the pressure-applying structure 13 applies pressure to the test bench 2 through the pressure-bearing structure 23. At this time, since the loaded object includes not only the base structure 21 but also the supporting structure 22, the detected displacement includes the displacement of the supporting structure 22, the base structure 21 and the tensile machine 1, which can improve the accuracy of the deformation test of the tensile machine 1 and the test bench 2.

[0079] The structural stiffness testing method provided by the present invention has the following advantages: first, the deformation of the test bench 2 and the tensile machine 1 themselves is obtained by empty loading, and then the stiffness of the structure 3 to be tested is calculated by deducting the deformation of the test bench 2 and the tensile machine 1 after the loading test. This can avoid the influence of deformations of other structures other than the deformation of the structure 3 to be tested as much as possible. While reducing or avoiding the addition of additional testing equipment, the test accuracy can be guaranteed at the lowest cost, and the difference in results between different tensile machines 1 can be avoided. The stiffness of the structure 3 to be tested, which has a higher stiffness itself, can be measured more accurately.

[0080] In addition to the above-mentioned structural stiffness testing method, the present invention also provides a structural stiffness testing system, which can implement the above-mentioned structural stiffness testing method, and the beneficial effects can be referred to the above-mentioned embodiments accordingly.

[0081] The structural stiffness test system includes:

[0082] A loading module, used to control the same tensile machine 1 to load two loaded objects in sequence in the same loading mode, and obtain the displacement of the tensile machine 1 and the loaded objects during each loading process;

[0083] Wherein, both of the two loaded objects include the same test bench 2, and only one of the loaded objects includes a structure under test 3 located above the test bench 2;

[0084] The calculation module is used to obtain the deformation of the measured structure 3 according to the difference of the displacement obtained in each loading process, and calculate the stiffness of the measured structure 3.

[0085] Optionally, in the loading module, controlling the same tensile machine 1 to sequentially load two loaded objects in the same loading mode, when loading the loaded object that does not include the measured structure 3, includes:

[0086] Controlling the pressure structure 13 of the tensile machine 1 to contact the base structure of the test bench 2 and perform loading;

[0087] The test bench 2 includes a base structure 21 and a plurality of support structures 22 fixed above the base structure 21 , and the top of the support structure 22 is used to support the structure 3 under test.

[0088] Alternatively, in the loading module, the same tensile machine 1 is controlled to load two loaded objects in sequence in the same loading mode, and the loaded objects excluding the measured structure 3 include the pressure-bearing structure 23, and the loading process includes:

[0089] Control the pressure-applying structure 13 of the tensile machine 1 to contact the pressure-bearing structure 23 on the top of the test bench 2 and apply loading;

[0090] The pressure-bearing structure 23 can be detachably placed on the top of the test bench 2 , and the displacement of the pressure-bearing structure 23 is less than a preset threshold.

[0091] Optionally, in the loading module, after obtaining the displacement of the tensile machine 1 and the loaded object during each loading process, and before obtaining the deformation of the measured structure 3 according to the difference in the displacement obtained during each loading process, the loading module further includes:

[0092] During each loading process, a relationship curve between the displacements of the tensile machine 1 and the object being loaded and the load applied by the tensile machine 1 is obtained.

[0093] In addition, the present invention also provides a structural stiffness testing device, comprising a memory and a processor. The memory is used to store a computer program; the processor is used to implement the steps and control system of any one of the above structural stiffness testing methods when executing the computer program. The structural stiffness testing device also has the beneficial effects of the above structural stiffness testing method.

[0094] In addition, the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps and control system of any one of the above-mentioned structural stiffness testing methods are implemented. The computer-readable storage medium also has the beneficial effects of the above-mentioned structural stiffness testing method.

[0095] It should be noted that when an element is referred to as "fixed" to another element, it may be directly on the other element or there may be an element in the middle. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an element in the middle. In addition, in the description of the present invention, unless otherwise specified, "multiple", "multiple roots", "multiple groups" mean two or more.

[0096] The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0097] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0098] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0099] The structural stiffness testing method, system, device and medium provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A structural stiffness testing method, characterized in that: include: Controlling the same tensile testing machine (1) to load two loaded objects in sequence in the same loading manner, and obtaining the displacements of the tensile testing machine (1) and the loaded objects during each loading process; Wherein, both of the two loaded objects include the same test bench (2), and only one of the loaded objects includes a structure to be tested (3) located above the test bench (2); The deformation of the structure (3) under test is obtained according to the difference in displacement obtained during each loading process, and the stiffness of the structure (3) under test is calculated.

2. The structural stiffness testing method according to claim 1, characterized in that: The method of controlling the same tensile testing machine (1) to sequentially load two loaded objects in the same loading manner, when loading the loaded object that does not include the measured structure (3), comprises: Controlling the pressure-applying structure of the tensile machine (1) to contact the base structure (21) of the test bench (2) and to perform loading; The test bench (2) comprises the base structure (21) and a plurality of support structures (22) fixed above the base structure (21), and the top of the support structure (22) is used to support the structure to be tested (3).

3. The structural stiffness testing method according to claim 1, characterized in that: The same tensile testing machine (1) is controlled to sequentially load two loaded objects in the same loading manner, wherein the loaded object excluding the measured structure (3) includes a pressure-bearing structure (23), and the loading process includes: Controlling the pressure-applying structure of the tensile machine (1) to contact the pressure-bearing structure (23) at the top of the test bench (2) and to load; The pressure-bearing structure (23) is detachably placed on the top of the test bench (2), and the displacement of the pressure-bearing structure (23) is less than a preset threshold.

4. The structural stiffness testing method according to claim 3, characterized in that: The rigidity of the pressure-bearing structure (23) is greater than the maximum rigidity of the test bench (2) and the tensile machine (1).

5. The structural stiffness testing method according to claim 3, characterized in that: The stiffness of the pressure-bearing structure (23) is greater than N times the estimated stiffness of the measured structure (3), where N is greater than 1.

6. The structural stiffness testing method according to any one of claims 1 to 5, characterized in that: After obtaining the displacement of the tensile machine (1) and the loaded object during each loading process, and before obtaining the deformation of the measured structure (3) according to the difference in the displacement obtained during each loading process, the method further comprises: During each loading process, a relationship curve between the displacements of the tensile machine (1) and the loaded object and the load applied by the tensile machine (1) is obtained.

7. A structural stiffness testing system, characterized in that: include: A loading module, used for controlling the same tensile testing machine (1) to load two loaded objects in sequence in the same loading manner, and obtaining the displacement of the tensile testing machine (1) and the loaded objects during each loading process; Wherein, both of the two loaded objects include the same test bench (2), and only one of the loaded objects includes a structure to be tested (3) located above the test bench (2); A calculation module is used to obtain the deformation of the measured structure (3) according to the difference in displacement obtained during each loading process, and calculate the stiffness of the measured structure (3).

8. The structural stiffness testing system according to claim 7, characterized in that: In the loading module, the control of the same tensile machine (1) to sequentially load two loaded objects in the same loading manner, when the loading is performed on the loaded object that does not include the measured structure (3), comprises: Controlling the pressure-applying structure of the tensile machine (1) to contact the base structure (21) of the test bench (2) and to perform loading; The test bench (2) comprises the base structure (21) and a plurality of support structures (22) fixed above the base structure (21), and the top of the support structure (22) is used to support the structure to be tested (3).

9. A structural stiffness testing device, characterized in that: include: Memory for storing computer programs; A processor is used to implement the steps of the structural stiffness testing method described in any one of claims 1 to 6 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the structural stiffness testing method according to any one of claims 1 to 6 are implemented.

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