Static force loading device for shelter test and static force loading test method

Abstract

The invention provides a static force loading device for shelter testing, which comprises a testing platform, a vertical frame and a supporting tool are arranged on the testing platform, the supporting tool is used for supporting the outer side surface of a shelter to be tested, a downward first force applying cylinder is arranged at the upper end of the vertical frame, a grid frame is arranged at the lower end of the first force applying cylinder, and a plurality of force equalizing brackets are arranged at the lower end of the grid frame. A second stress application cylinder is further arranged on one side of the supporting tool on the testing platform, a pushing frame is arranged at the end, close to the shelter to be tested, of the second stress application cylinder, the pushing frame abuts against the outer side face of the shelter to be tested, and the problem that the integrated shelter simulates the gas jet impact test is solved.

Description

Technical Field

[0001] The invention relates to the field of shelter testing, and in particular to a static loading device and a static loading testing method for shelter testing. Background Art

[0002] When a rocket is launched, the gas jet will have a serious gas shock effect on the launch environment and surrounding equipment. The gas jet of the composite charge engine has a higher temperature, faster flow rate, and greater harm. Therefore, for the lightweight multifunctional integrated cabin used for transportation and launching, it is particularly necessary to consider its ability to withstand the high temperature and high pressure of the gas jet to ensure that it does not disintegrate and be damaged after multiple launches. In order to simulate the gas jet impact stress that the specimen is subjected to in actual use, it is necessary to carry out a static loading test on it, to provide a test basis for the design and manufacture of the lightweight multifunctional integrated cabin, and to ensure the combat effectiveness and reliability of the launch vehicle.

[0003] In the prior art, there are two main ways to statically load the force-bearing surface. One is to perform a static test by pulling the canvas sheet after pasting it. The pasted material will damage the local structure of the composite material. In addition, the solidification time usually takes 5 days to be used for the test, and due to the limitation of the pasting area and other conditions, too much load cannot be applied. And this method is only suitable for tensile tests, not thrust tests.

[0004] The other method is to perform a static test by fitting the airbag to the loading surface and then filling the airbag with gas to generate a certain pressure. The airbag in the airbag static loading test needs to be designed and matched according to the product structure. It cannot be reused, and the protruding components such as joints on the surface of the structure must be taken into account, which is difficult to design. Secondly, how to conduct a safe test, that is, it is necessary to consider the explosion of the airbag caused by inflation exceeding the rated load, or the sudden explosion caused by sharp objects on the surface of the structure during loading, which poses a safety risk. In addition, a large metal container needs to be made to confine the airbag, which not only reduces the observability of the test phenomenon, but also increases the test cost and difficulty. Summary of the invention

[0005] The invention provides a static loading device and a static loading test method for a shelter test, which solves the problem of simulated gas jet impact test of an integrated shelter.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a static loading device for testing a cabin, including a test platform, a stand and a supporting tooling are provided on the test platform, the supporting tooling is used to support the outer side of the cabin to be tested, a first boosting cylinder facing downwards is provided at the upper end of the stand, a grid frame is provided at the lower end of the first boosting cylinder, a plurality of force-balancing supports are provided at the lower end of the grid frame, the force-balancing supports are against the inner side of the cabin to be tested, a second boosting cylinder is also provided on one side of the supporting tooling on the test platform, a push frame is provided at one end of the second boosting cylinder close to the cabin to be tested, and the push frame is against the outer side of the cabin to be tested.

[0007] In a preferred solution, the supporting tooling includes a base frame, which is placed on the test platform. A plurality of side frames are provided on the base frame, each of which is provided with a first supporting panel, and the first supporting panel is connected to the outer side wall of the cabin to be tested.

[0008] In a preferred solution, the force-equalizing support frame includes a first connecting end to the grid frame, a downward extending portion is provided at the lower end of the first connecting end, and a second supporting panel is provided at the lower end of the downward extending portion.

[0009] In a preferred solution, the lower end surface of the grid frame is provided with a plurality of first sliding slots arranged in a transverse and longitudinal staggered manner, and is also provided with a plurality of sliding connection blocks, one end of the sliding connection block is clamped in the first sliding slot and slides, and the other end of the sliding connection block is connected to the first connection end.

[0010] In a preferred embodiment, the sliding connection block includes a T-block and a connecting sleeve, the T-block is arranged in the first sliding slot, the connecting sleeve is sleeved with the first connecting end, the first sliding slot is provided with a slot bottom surface and a slot side wall surface, the T-block is provided with a first sliding cavity and a second sliding cavity perpendicular to each other, a first slidable telescopic block is provided in the first sliding cavity, one end of the first telescopic block is used to abut against the slot bottom surface, the other end of the first telescopic block is provided with a push spring abutting against the inside of the T-block, second telescopic blocks are respectively provided at both ends of the second sliding cavity, one end of the second telescopic block is used to abut against the slot side wall surface, the other end of the second telescopic block is provided with a second wedge surface, the first telescopic block and the two second telescopic blocks are each provided with a first wedge surface near the end, and the first wedge surface abuts against the second wedge surface.

[0011] In the preferred embodiment, the T-block is also provided with a third sliding cavity perpendicular to the first sliding cavity and the second sliding cavity, and adjustment blocks are provided at both ends of the third sliding cavity. The adjustment blocks are provided with a third wedge-shaped surface, and dovetail grooves are provided at both ends of the first telescopic block, and the third wedge-shaped surface rests on the dovetail groove.

[0012] In a preferred embodiment, the connecting sleeve includes a plurality of deformable clamping petals, an outer conical surface is provided on the outer side of the clamping petals, an outer threaded portion is provided on the outer wall of one end of the connecting sleeve close to the T-block, and a locking ring is also provided, one end of the locking ring is threadedly connected to the external threaded portion, and an inner conical surface is provided on the other end of the locking ring, and the inner conical surface squeezes the outer conical surface to clamp the clamping petals.

[0013] In a preferred solution, a cross plate is further provided, the cross plate is provided with a second sliding slot, the second sliding slot is used to connect with the sliding connection block, and second connecting ends are provided at both ends of the cross plate, the second connecting ends are used to be connected with the connecting sleeve.

[0014] In the preferred embodiment, the first boosting cylinder and the second boosting cylinder both include a cylinder body and a cylinder rod, a joint bearing is provided at the end of the cylinder rod, the joint bearing is hinged to the grid frame or the push frame, a rotatable swing seat is provided at the end of the cylinder body, the swing seat is used to connect to the test platform or the stand, a displacement sensor is also provided on one side of the cylinder body, the moving end of the displacement sensor is connected to the cylinder rod, and a load sensor is connected between the cylinder rod and the joint bearing.

[0015] The test method is: Establish a virtual model of the shelter to be tested; Customized design of virtual models of push rack, support fixture and force-balancing support frame according to the virtual model of the shelter to be tested; Assemble the virtual model of the shelter to be tested, the push frame, the force-balancing frame and the virtual model of the supporting tooling, add stress conditions and perform virtual stress analysis; According to the virtual force analysis, determine the weak and strong points of the shelter to be tested; Make and assemble the physical objects according to the virtual models of the model, push frame, force-balancing frame and supporting tooling; Place the test cabin on the test platform and under the stand, load the test cabin, and install the second booster cylinder and pusher on one side of the test cabin; Install the strain gauge at the weak point of the shelter to be tested; Install a displacement sensor between the solid point of the tested cabin and the test platform; The first booster cylinder presses down the test piece through the grid frame and the force-balancing frame, while the second booster cylinder pushes up the side end of the test cabin through the push frame; During the test, strain gauge and displacement sensor data were collected; Record and analyze test results.

[0016] The beneficial effects of the present invention are as follows: loading tooling will not damage the product structure and is safe and controllable; the servo cylinder has fast response, high precision, high synchronization, and stable performance, and can adjust the driving force in real time and collect feedback data; a plurality of force-balancing supports are used to evenly transmit the force to the cabin, and the force is dispersed, so as to simulate as realistically as possible the gas impact effect that the lightweight multifunctional integrated cabin is subjected to during rocket launch; a grid frame with a slide groove is used, and the position of the sliding connection block can be freely adjusted to match the position of the force point of the cabin to be tested, and can be adapted to cabins of different specifications; virtual modeling and simulation analysis are used to screen test plans in advance, find reasonable support points and stress and strain test positions, and design reasonable force-balancing supports, support tooling and push frame structures to avoid cost waste caused by substandard test systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the static loading device.

[0019] Figure 2 It is a schematic diagram of the supporting tooling.

[0020] Figure 3 Schematic diagram of the upper force-applying component.

[0021] Figure 4 This is a schematic diagram of the bottom of the grid frame.

[0022] Figure 5 It is a diagram of the grid area lap support structure.

[0023] Figure 6 is a cross-sectional view of the sliding connection block.

[0024] Figure 7 This is another cross-sectional view of the sliding connection block.

[0025] Figure 8 It is a schematic diagram of T-block and connecting block.

[0026] Fig. 9 This is a diagram of the cylinder assembly.

[0027] Fig.10 It is a test system diagram.

[0028] Fig.11 It is the diagram of the cylinder control system.

[0029] Fig.12 This is a graph of static loading test data.

[0030] Fig.13 This is the second figure of static loading test data.

[0031] Fig.14 These are three graphs of static loading test data.

[0032] Fig.15 These are four graphs of static loading test data.

[0033] Fig.16 This is a virtual stress simulation diagram of the shelter.

[0034] In the figure: test platform 1; stand 2; bar base 201; column 202; crossbeam 203; first booster cylinder 3; cylinder body 301; cylinder rod 302; swing seat 303; joint bearing 304; displacement sensor 305; load sensor 306; servo valve 307; oil circuit branch 308; support tool 4; bottom frame 401; side frame 402; first support panel 403; second booster cylinder 5; push frame 501; grid frame 6; first sliding card slot 601; card slot bottom surface 602; card slot side wall surface 603; force equalizing frame 7; first connecting end 701; lower extension part 702 ; second supporting panel 703; sliding connection block 8; T-block 801; connecting sleeve 802; first telescopic block 803; first wedge surface 804; second telescopic block 805; second wedge surface 806; push spring 807; first sliding cavity 808; second sliding cavity 809; third sliding cavity 810; dovetail groove 811; adjusting block 812; third wedge surface 813; limiting groove 814; clamping petal 815; external threaded portion 816; locking ring 817; external conical surface 818; internal conical surface 819; cross plate 9; second sliding slot 901; second connecting end 902; test cabin 10. DETAILED DESCRIPTION

[0035] Embodiment 1: like Figure 1-9 A static loading device for testing a square cabin is disclosed, comprising a test platform 1, a stand 2 and a supporting fixture 4 are provided on the test platform 1, the supporting fixture 4 is used to support the outer side of the square cabin 10 to be tested, a first boosting cylinder 3 facing downward is provided at the upper end of the stand 2, a grid frame 6 is provided at the lower end of the first boosting cylinder 3, a plurality of force-balancing supports 7 are provided at the lower end of the grid frame 6, the force-balancing supports 7 are against the inner side of the square cabin 10 to be tested, a second boosting cylinder 5 is further provided on one side of the supporting fixture 4 on the test platform 1, a push frame 501 is provided at one end of the second boosting cylinder 5 close to the square cabin 10 to be tested, and the push frame 501 is against the outer side of the square cabin 10 to be tested.

[0036] The test cabin 10 is generally a box-type or box-type structure with one side open, and the recessed part of the box or box is the inner side. During the test, the open side of the test cabin 10 faces upward, and the force-balancing support frame 7 abuts against the inner bottom end surface of the test cabin 10. Part of the side wall of the test cabin 10 has a certain inclination angle.

[0037] The first boosting cylinder 3 and the second boosting cylinder 5 are arranged at a certain angle. During the test, the tested cabin 10 is installed on the supporting tooling 4, and strain gauges and displacement sensors are installed on the tested cabin 10. The first boosting cylinder 3 and the second boosting cylinder 5 apply the set pressure at the same time, squeeze the tested cabin 10 from two directions, and record the strain at each position of the tested cabin 10 and the overall displacement.

[0038] A plurality of force-balancing supports 7 are used to form multi-point supports inside the test cabin 10 , so that the pressure is applied to the test cabin 10 more evenly, which is more in line with the actual stress condition of the test cabin 10 .

[0039] The stand 2 includes a strip base 201, a column 202 and a crossbeam 203. The strip base 201, the column 202 and the crossbeam 203 are provided with a plurality of mounting holes, and the width of the door-shaped structure can be freely adjusted.

[0040] The second booster cylinder 5 is connected to the test platform 1 through a bracket. The test platform 1 is provided with a T-slot, and the installation position of the bracket and the stand 2 can be freely adjusted.

[0041] In a preferred embodiment, the supporting tooling 4 includes a base frame 401, which is placed on the test platform 1. A plurality of side frames 402 are provided on the base frame 401. Each side frame 402 is provided with a first supporting panel 403, and the first supporting panel 403 is connected to the outer wall of the test cabin 10.

[0042] The connection position between the first support panel 403 and the test cabin 10 can be selected from the installation foundation of the test cabin 10, which is more in line with actual working conditions.

[0043] In a preferred solution, the force-balancing support frame 7 includes a first connecting end 701 connected to the grid frame 6 , a downward extending portion 702 is provided at the lower end of the first connecting end 701 , and a second supporting panel 703 is provided at the lower end of the downward extending portion 702 .

[0044] The second support panel 703 can be horizontal or tilted, depending on the angle of the test cabin 10 at the contact position.

[0045] In the preferred embodiment, the lower end surface of the grid frame 6 is provided with a plurality of first sliding slots 601 which are arranged in a transverse and longitudinal staggered manner, and is also provided with a plurality of sliding connection blocks 8, one end of the sliding connection block 8 is clamped in the first sliding slot 601 and slides, and the other end of the sliding connection block 8 is connected to the first connection end 701.

[0046] The first sliding slots 601 can be T-shaped slots. The first sliding slots 601 are staggered in a grid shape, and the sliding connection blocks 8 can slide in each of the first sliding slots 601, which can adapt to different specifications of the test cabins 10. According to the support position of the inner side of the test cabin 10, the sliding connection blocks 8 are adjusted to the upper side of the corresponding position, and then the force equalizing support frame 7 is installed, and the second support panel 703 can be aligned with the correct contact position.

[0047] In the preferred embodiment, the sliding connection block 8 includes a T-block 801 and a connecting sleeve 802. The T-block 801 is arranged in the first sliding card slot 601. The connecting sleeve 802 is sleeved with the first connecting end 701. The first sliding card slot 601 is provided with a card slot bottom surface 602 and a card slot side wall surface 603. The T-block 801 is provided with a first sliding cavity 808 and a second sliding cavity 809 which are perpendicular to each other. A slidable first telescopic block 803 is provided in the first sliding cavity 808. One end of the first telescopic block 803 is used to abut against the card slot. On the bottom surface 602, the other end of the first telescopic block 803 is provided with a push spring 807 that abuts against the inside of the T-block 801, and the second telescopic blocks 805 are respectively provided at both ends of the second sliding cavity 809. One end of the second telescopic block 805 is used to abut against the side wall surface 603 of the slot, and the other end of the second telescopic block 805 is provided with a second wedge surface 806. The first telescopic block 803 and the two second telescopic blocks 805 are each provided with a first wedge surface 804 near the end, and the first wedge surface 804 abuts against the second wedge surface 806.

[0048] A recessed groove is opened in the middle of both ends of the first telescopic block 803 and a push spring 807 is placed therein. A hole is opened on the T-block 801 and a push screw is screwed in. The push screw abuts against the end of the push spring 807 to continuously squeeze the first telescopic block 803, so that the first telescopic block 803 abuts against the bottom surface 602 of the slot. When the first booster cylinder 3 applies pressure, the first telescopic block 803 squeezes the second telescopic block 805, and the T-block 801 gradually contacts the bottom surface 602 of the slot, and at the same time, the second telescopic block 805 extends out and presses the side wall 603 of the slot, locking the position of the sliding connection block 8.

[0049] The first connection end 701 may be cylindrical or polygonal, and the inner tube of the connection sleeve 802 is a shape matching the first connection end 701 . The first connection end 701 is inserted and pushed against the bottom end of the connection sleeve 802 to transmit pressure.

[0050] In the preferred embodiment, the T-block 801 is further provided with a third sliding cavity 810 which is perpendicular to the first sliding cavity 808 and the second sliding cavity 809. Adjustment blocks 812 are provided at both ends of the third sliding cavity 810. The adjustment block 812 is provided with a third wedge-shaped surface 813. Dovetail grooves 811 are provided at both ends of the first telescopic block 803. The third wedge-shaped surface 813 rests on the dovetail grooves 811.

[0051] The adjusting block 812 is provided with a limiting groove 814, and a screw threaded top screw is provided on the T-shaped block 801 and inserted into the limiting groove 814 to limit the displacement amplitude of the adjusting block 812. When the two adjusting blocks 812 are pressed toward each other to the bottom, the first telescopic block 803 is lifted and pushes the second telescopic block 805 to extend outward but just does not contact the side wall surface 603 of the card slot. At this time, the sliding connection block 8 can slide freely in the first sliding card slot 601. However, when the first telescopic block 803 continues to retract, the dovetail groove 811 is out of contact with the third wedge surface 813, that is, it does not affect the second telescopic block 805 from squeezing the side wall surface 603 of the card slot.

[0052] In the preferred embodiment, the connecting sleeve 802 includes a plurality of deformable clamping petals 815, an outer side of the clamping petals 815 is provided with an outer conical surface 818, an outer wall of one end of the connecting sleeve 802 close to the T-block 801 is provided with an external threaded portion 816, and a locking ring 817 is also provided, one end of the locking ring 817 is threadedly connected to the external threaded portion 816, and the other end of the locking ring 817 is provided with an inner conical surface 819, and the inner conical surface 819 squeezes the outer conical surface 818 to clamp the clamping petals 815.

[0053] After the first connection end 701 is sleeved with the connection sleeve 802 , the locking ring 817 is rotated to lock the first connection end 701 .

[0054] In the preferred solution, a cross plate 9 is also provided, and the cross plate 9 is provided with a second sliding slot 901, the second sliding slot 901 is used to connect with the sliding connection block 8, and second connecting ends 902 are provided at both ends of the cross plate 9, and the second connecting ends 902 are used to be sleeved with the connecting sleeve 802.

[0055] Since the grid frame 6 is a grid-shaped welded frame, the middle grid area cannot be used as a force support point. Therefore, two sliding connection blocks 8 are installed in the nearest first sliding slot 601, and then the two ends of the cross plate 9 are installed on the sliding connection blocks 8. Another sliding connection block 8 is placed in the second sliding slot 901 to align with the first connection end 701. Figure 5 .

[0056] In the preferred embodiment, the first boosting cylinder 3 and the second boosting cylinder 5 both include a cylinder body 301 and a cylinder rod 302. A joint bearing 304 is provided at the end of the cylinder rod 302. The joint bearing 304 is hinged to the grid frame 6 or the push frame 501. A rotatable swing seat 303 is provided at the end of the cylinder body 301. The swing seat 303 is used to connect with the test platform 1 or the stand 2. A displacement sensor 305 is also provided on one side of the cylinder body 301. The moving end of the displacement sensor 305 is connected to the cylinder rod 302. The cylinder rod 302 and the joint bearing 304 are connected by a load sensor 306.

[0057] The first boosting cylinder 3 and the second boosting cylinder 5 are oil cylinders or electric cylinders, and the displacement sensor 305 is used to monitor the extension length of the cylinder rod 302 .

[0058] When the first boosting cylinder 3 and the second boosting cylinder 5 are oil cylinders, a servo valve 307 may be installed on one side of the cylinder body 301 , and oil is transported and returned to the two chambers inside the cylinder body 301 through two oil branch lines 308 .

[0059] Embodiment 2: like Figure 1-15 , a static loading test method using the static loading device for shelter testing as described in claim 1: Establish a virtual model of the shelter to be tested; Customized design of virtual models of push rack, support fixture and force-balancing support frame according to the virtual model of the shelter to be tested; Assemble the virtual model of the shelter to be tested, the push frame, the force-balancing frame and the virtual model of the supporting tooling, add stress conditions and perform virtual stress analysis; According to the virtual force analysis, the weak and strong points of the shelter to be tested are determined, such as Fig.16 The middle red area is the weak point; Make and assemble the physical objects according to the virtual models of the model, push frame, force-balancing frame and supporting tooling; Place the test cabin 10 on the test platform and under the stand 2, load the test cabin 10, and install the second booster cylinder 5 and the push frame 501 on one side of the test cabin 10; Install the strain gauge at the weak point of the tested cabin 10; A displacement sensor is installed between the solid point of the test cabin 10 and the test platform 1; The first booster cylinder 3 presses down the test piece through the grid frame 6 and the force-balancing frame 7, while the second booster cylinder 5 pushes up the side end of the test cabin 10 through the push frame 501; During the test, strain gauge and displacement sensor data were collected; Record and analyze test results.

[0060] Embodiment 3: Static loading system Fig.10 As shown, it mainly includes a loading test system and a data monitoring system: the loading test system has two main control modes, force control and displacement control. No matter which control mode is used, the software can display the loading curve (target value and actual value) in real time, and display the loading status (which step it is at); the data monitoring system adjusts the control output signals of each channel to the servo valve through an algorithm according to the loading test conditions and the feedback of the force or displacement sensor. The servo valve adjusts the output according to the control signal to control the movement of the servo cylinder until the loading requirements are met. The present invention solves the problems in traditional technology that it is difficult to conduct multi-point simultaneous testing and multi-point data synchronous collection for complex components, the component structure itself is easily damaged, and the safety is poor.

[0061] Static loading test equipment Figure 1As shown in the figure, it consists of a T-shaped cast iron platform, a servo cylinder, a loading fixture, and a building block frame. The test piece is fixed to the supporting fixture by M12 bolts, and the servo cylinder is fixed to the building block frame and the T-shaped cast iron platform. The static loading assembly includes two groups, which are located on the inner surface of the lightweight multifunctional integrated cabin and the top surface of the forming plate; the loading force on the inner surface of the cabin is provided by the servo cylinder, and the force is transmitted to the force-bearing surface by the loading frame and eight loading blocks. The loading frame and the loading block can be connected by a 40mm×40mm square tenon and tenon hole; the loading force on the top surface of the cabin forming plate is provided by the servo cylinder, and the force is transmitted to the force surface by a rectangular channel steel. All loading servo cylinders and loading fixtures are connected by flat-head cylindrical pins with holes.

[0062] The servo cylinder adopts a single-rod action mode, which can convert the hydraulic energy from the hydraulic source into mechanical energy. It consists of a servo valve, a displacement sensor, a load sensor, a piston rod, a fisheye joint bearing, an oil circuit, etc. It gives full play to the advantages of both electronics and hydraulics, and can control large inertia and output power, and has high precision and high response performance.

[0063] The working principle of servo cylinder is as follows Fig.11 As shown, the system adjusts each control output signal to the servo valve through an algorithm according to the loading test conditions and the feedback from the load and displacement sensors. The servo valve adjusts the output according to the control signal to control the movement of the servo cylinder until the loading requirements are met.

[0064] Before the actual static loading test, the loading force (gradual loading), loading time, and holding time are set through the control software. Figure 12-13 shown.

[0065] The servo cylinder loading force during the entire test process is monitored in real time by the signal acquisition device, and the actual data collected is as follows: Figure 14-15 shown.

[0066] By comparing the data of 12-15, it can be found that the actual loading force of the system is basically consistent with the preset loading force (deviation value ≤ 0.89%), which can simulate the actual working conditions of the lightweight multifunctional integrated cabin under the high temperature and high pressure of the gas jet, and provide a test basis for the design and manufacture of the lightweight multifunctional integrated cabin, thus ensuring the combat effectiveness and reliability of the launch vehicle.

[0067] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A static loading device for shelter testing, characterized by: The invention comprises a test platform (1), wherein a stand (2) and a supporting tool (4) are provided on the test platform (1), wherein the supporting tool (4) is used to support the outer side of a square cabin (10) to be tested, wherein a first boosting cylinder (3) facing downward is provided at the upper end of the stand (2), a grid frame (6) is provided at the lower end of the first boosting cylinder (3), a plurality of force-balancing support frames (7) are provided at the lower end of the grid frame (6), and the force-balancing support frames (7) are abutted against the inner side of the square cabin (10) to be tested, and a second boosting cylinder (5) is further provided on one side of the supporting tool (4) on the test platform (1), and a push frame (501) is provided at one end of the second boosting cylinder (5) close to the square cabin (10) to be tested, and the push frame (501) abuts against the outer side of the square cabin (10) to be tested.

2. The static loading device for shelter testing according to claim 1 is characterized in that: The supporting tooling (4) comprises a base frame (401), the base frame (401) being placed on the test platform (1), a plurality of side frames (402) being arranged on the base frame (401), each side frame (402) being provided with a first supporting panel (403), and the first supporting panel (403) being connected to the outer side wall of the test cabin (10).

3. The static loading device for shelter testing according to claim 1 is characterized in that: The force-equalizing support frame (7) comprises a first connecting end (701) connected to the grid frame (6); a downward extending portion (702) is provided at the lower end of the first connecting end (701); and a second supporting panel (703) is provided at the lower end of the downward extending portion (702).

4. The static loading device for shelter testing according to claim 3 is characterized in that: The lower end surface of the frame (6) is provided with a plurality of first sliding slots (601) arranged in a transverse and longitudinal staggered manner, and is also provided with a plurality of sliding connection blocks (8), one end of the sliding connection block (8) is clamped in the first sliding slot (601) to slide, and the other end of the sliding connection block (8) is connected to the first connection end (701).

5. The static loading device for shelter testing according to claim 4 is characterized in that: The sliding connection block (8) comprises a T-shaped block (801) and a connection sleeve (802), wherein the T-shaped block (801) is arranged in the first sliding slot (601), the connection sleeve (802) is sleeved with the first connection end (701), the first sliding slot (601) is provided with a slot bottom surface (602) and a slot side wall surface (603), the T-shaped block (801) is provided with a first sliding cavity (808) and a second sliding cavity (809) which are perpendicular to each other, a first telescopic block (803) which can slide is arranged in the first sliding cavity (808), one end of the first telescopic block (803) is used to abut against the slot bottom surface (602) and the second sliding cavity (809) is provided with a first sliding cavity (808) and a second sliding cavity (809) which can slide. 602), the other end of the first telescopic block (803) is provided with a push spring (807) that abuts against the inside of the T-block (801), and second telescopic blocks (805) are respectively provided at both ends of the second sliding cavity (809), one end of the second telescopic block (805) is used to abut against the side wall surface of the card slot (603), and the other end of the second telescopic block (805) is provided with a second wedge surface (806), and the first telescopic block (803) and the two second telescopic blocks (805) are each provided with a first wedge surface (804) near their ends, and the first wedge surface (804) and the second wedge surface (806) abut against each other.

6. The static loading device for shelter testing according to claim 5 is characterized in that: The T-shaped block (801) is further provided with a third sliding cavity (810) which is perpendicular to the first sliding cavity (808) and the second sliding cavity (809); adjustment blocks (812) are provided at both ends of the third sliding cavity (810); the adjustment blocks (812) are provided with a third wedge-shaped surface (813); dovetail grooves (811) are provided at both ends of the first telescopic block (803); the third wedge-shaped surface (813) abuts against the dovetail grooves (811).

7. The static loading device for shelter testing according to claim 5 is characterized by: The connecting sleeve (802) comprises a plurality of deformable clamping petals (815), the outer side of the clamping petals (815) being provided with an outer conical surface (818), an outer wall of one end of the connecting sleeve (802) close to the T-shaped block (801) being provided with an outer threaded portion (816), and a locking ring (817) being further provided, one end of the locking ring (817) being threadably sleeved with the outer threaded portion (816), and the other end of the locking ring (817) being provided with an inner conical surface (819), the inner conical surface (819) pressing the outer conical surface (818) so as to clamp the clamping petals (815).

8. The static loading device for shelter testing according to claim 5 is characterized by: A cross plate (9) is also provided, the cross plate (9) is provided with a second sliding slot (901), the second sliding slot (901) is used to be connected to the sliding connection block (8), and second connecting ends (902) are provided at both ends of the cross plate (9), the second connecting ends (902) are used to be sleeved with the connecting sleeve (802).

9. The static loading device for shelter testing according to claim 1 is characterized in that: The first boosting cylinder (3) and the second boosting cylinder (5) both comprise a cylinder body (301) and a cylinder rod (302); a joint bearing (304) is provided at the end of the cylinder rod (302); the joint bearing (304) is hinged to a grid frame (6) or a push frame (501); a rotatable swing seat (303) is provided at the end of the cylinder body (301); the swing seat (303) is used to be connected to a test platform (1) or a stand (2); a displacement sensor (305) is also provided at one side of the cylinder body (301); a movable end of the displacement sensor (305) is connected to the cylinder rod (302); and a load sensor (306) is connected between the cylinder rod (302) and the joint bearing (304).

10. A static loading test method using the static loading device for shelter testing according to claim 1, characterized in that: Establish a virtual model of the shelter to be tested; Customized design of virtual models of push rack, support fixture and force-balancing support frame according to the virtual model of the shelter to be tested; Assemble the virtual model of the shelter to be tested, the push frame, the force-balancing frame and the virtual model of the supporting tooling, add stress conditions and perform virtual stress analysis; According to the virtual force analysis, determine the weak and strong points of the shelter to be tested; Make and assemble the physical objects according to the virtual models of the model, push frame, force-balancing frame and supporting tooling; Placing the test cabin (10) on the test platform and below the stand (2), loading the test cabin (10), and installing the second booster cylinder (5) and the push frame (501) on one side of the test cabin (10); Install the strain gauge at the weak point of the test cabin (10); Installing a displacement sensor between a solid point of the test cabin (10) and the test platform (1); The first boosting cylinder (3) presses down the object to be tested through the grid frame (6) and the force-balancing support frame (7), while the second boosting cylinder (5) pushes up the side end of the square cabin (10) to be tested through the pushing frame (501); During the test, strain gauge and displacement sensor data were collected; Record and analyze test results.

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