WO2023123734A1

WO2023123734A1 - Static test high-dimension large-load adjustable force-bearing platform and testing method

Info

Publication number: WO2023123734A1
Application number: PCT/CN2022/086027
Authority: WO
Inventors: 刘炳立; 臧博; 张宝康; 周国栋; 刘禹含; 闫虎义
Original assignee: 北京空间机电研究所
Priority date: 2021-12-31
Filing date: 2022-04-11
Publication date: 2023-07-06
Also published as: CN114427963A; CN114427963B

Abstract

Provided by the present invention are a static test high-dimension large-load adjustable force-bearing platform and testing method, relating to the technical field of spacecraft mechanical testing. The above comprises a force-bearing ground rail, a loading support beam, a force-bearing beam, a force-bearing mechanism, and a loading mechanism; a first loading support beam is arranged on the force-bearing ground rail, the first force-bearing beam is arranged above the first loading support beam, the second loading support beam is mounted above the first force-bearing beam, the second force-bearing beam is fixed above the second loading support beam, and the third force-bearing beam is connected and fixed to the second force-bearing beam. The force-bearing mechanism comprises a force-bearing screw rod, a gasket, a force bearing screw lock insert, and a force-bearing slide block, and the force-bearing mechanism is connected to the third force-bearing beam and the force-bearing ground rail. A third loading support beam is also arranged on the second force-bearing beam, a fourth force-bearing beam is arranged on the third loading support beam, a loading mechanism is arranged on the fourth force-bearing beam, and the loading mechanism comprises a horizontal actuator, a force-measuring sensor, and a force-bearing screw rod. The platform can complete assessment of different transverse loadings of a large cabin body without rotating the cabin body.

Description

A static test high-size large-load adjustable load-bearing platform and test method

technical field

The invention relates to the technical field of spacecraft mechanics tests, in particular to a static test high-size and large-load adjustable load-bearing platform and a test method.

Background technique

The large-scale cabin structure test piece of the spacecraft, the rationality of its structural design is assessed through the static test, and the design flaws are exposed. During the test process, in order to simulate the real loading situation during the launch process, it is necessary to complete the longitudinal and horizontal simultaneous loading assessments while keeping the longitudinal loading direction unchanged. In addition, it is necessary to continue to complete the record assessments in other directions in the horizontal direction, usually twice. The directions of lateral loading are at right angles. Usually, due to the limitation of the fixed position of the horizontally fixed load-bearing platform, when adjusting the loading direction for lateral loading, it is often necessary to rotate the test specimen, otherwise the loading cannot be achieved.

In the prior art, the static test of large-scale cabin needs to complete the transverse assessment of high center of mass and large load. In the two directions of transverse assessment, conventional test methods can be used. After completing the transverse load in one direction, the test must be dismantled in sequence All the loading tools inside and outside the cabin on the parts, the separation cabin body is connected with the lower end test base, the cabin body is rotated 90°, and another loading tooling inside and outside the lateral loading cabin is installed in sequence, and the horizontal load is completed through the fixed load-bearing platform. Loading: In the process of changing the direction of lateral loading, it takes a lot of time and increases the risk of bumping the cabin during disassembly and installation.

Therefore, it is necessary to further improve the high-size, large-load and adjustable loading static test platform to improve the efficiency and scientificity of the static test of the large-scale spacecraft cabin structure.

technical solution

In order to meet the assessment requirements of the center of mass height and load level of the different lateral loads of the cabin structure, avoid the uncertainty risk and cost brought by a large number of disassembly and assembly during the conversion of working conditions, and improve the efficiency and scientificity of the test, the present invention A high-size, large-load adjustable load-bearing platform and a test method for a static test are provided, and the specific technical scheme is as follows.

A high-size, large-load adjustable load-bearing platform for static tests, including a load-bearing ground rail, a loading support beam, a load-bearing beam, a load-bearing mechanism, and a loading mechanism, and four first load-bearing platforms are arranged on the load-bearing ground rail. Support beams, two first load-bearing beams are arranged in parallel above the first load-bearing support beam; four second load-bearing beams are respectively installed above the first load-bearing beam, and the second load-bearing beam is fixed above the second load-bearing beam , the third load-bearing beam is connected and fixed to the second load-bearing beam; a third load-bearing beam is also arranged on the second load-bearing beam, a fourth load-bearing beam and a fifth load-bearing beam are arranged on the third load-bearing beam, and the fourth load-bearing beam A loading mechanism is set on the force beam; the loading mechanism includes a horizontal actuator, a load cell and a load-bearing screw, the horizontal actuator is vertically arranged with the fourth load-bearing beam, and the force sensor is arranged on the load-bearing screw and the horizontal actuating screw. Between the devices; the load-bearing mechanism includes a load-bearing screw, a load-bearing screw sleeve and a load-bearing slider, and the load-bearing mechanism is connected to the third load-bearing beam and the load-bearing ground rail.

Preferably, the load-bearing beam includes a first load-bearing beam, a second load-bearing beam, a third load-bearing beam, a fourth load-bearing beam and a fifth load-bearing beam; Support beams and third loading braces.

Preferably, the load-bearing beam is strip-shaped and has a plurality of mounting holes arranged in a row, the first loading support beam and the second loading support beam are trapezoidal, and the third loading support is step-trapezoidal.

Preferably, there are two fifth load-bearing beams, which are respectively arranged on the top and side of the third load-bearing support; the fourth load-bearing beam is arranged on the straight edge of the third load-bearing support.

It is also preferred that the first load-bearing beams are connected in contact with the test base; the distance between the two first load-bearing beams arranged in parallel is equal to the distance between the second load-bearing beams arranged in parallel; The bottom is also provided with reinforcement beams.

Also preferably, the load-bearing mechanism also includes a gasket and a load-bearing nut, the load-bearing slider is matched with the load-bearing ground rail, the load-bearing screw is connected and fixed by a load-bearing screw sleeve, and the load-bearing screw sleeve and the third load-bearing beam The mounting holes on the top are fixed by washers and bearing nuts.

Also preferably, the loading mechanism further includes a hinge and a loading connecting plate, the horizontal actuator is fixed on the fourth load-bearing beam through the loading connecting plate, the end of the horizontal actuator is equipped with a load cell, and the load-bearing screw passes through the hinge Connect the horizontal actuator.

A high-size, large-load adjustable load-bearing test method for a static test, using the above-mentioned high-size, large-load adjustable load-bearing platform for a static test, the steps include: matching the test cabin with the test base, and fixing the test cabin The internal and external loading fixtures are loaded synchronously in the longitudinal and lateral directions of the test cabin, and the rationality of the cabin structure is assessed; the position of the loading mechanism is adjusted, the direction of lateral loading is adjusted, and the longitudinal and lateral loading of the test cabin is simultaneously loaded. The rationality of the cabin structure.

Further preferably, the adjusted lateral loading direction is 90 degrees to the original lateral synchronous loading direction.

Further preferably, the loading connecting plate and the bearing beam of the loading mechanism are positioned and the position of the loading center of mass is adjusted, and the loading mechanism adjusts the magnitude of the loading load.

Beneficial effect

The invention provides a high-size, large-load adjustable load-bearing platform and test method for static tests. The beneficial effect is that the test support platform is built by using the combined structure of the loaded support beam and the load-bearing beam, and the spliced structure is light in weight and strong in bearing capacity. , the installation of the loading tool is convenient and flexible, and it can also meet the requirements of multi-point lateral loading assessment; the detachable connection between the load-bearing mechanism and the loading mechanism is more flexible, and the load of different loading points can be completed by adjusting the position of the loading mechanism Improving the efficiency and scientificity of the test.

Description of drawings

Figure 1 is a structural schematic diagram of a high-size, large-load adjustable load-bearing platform for a static test;

Fig. 2 is a partial structural schematic diagram of the load-bearing platform;

Figure 3 is a schematic diagram of the installation structure of the high-size, large-load adjustable load-bearing platform for the static test;

Fig. 4 is a schematic diagram of the installation structure of the test cabin;

Fig. 5 is the test schematic diagram of loading;

In the figure: 1-bearing ground rail, 2-loading support beam, 3-bearing beam, 4-bearing mechanism, 5-loading mechanism, 6-test cabin, 7-test base;

21-the first loading support beam, 22-the second loading support beam, 23-the third loading support;

31-the first load-bearing beam, 32-the second load-bearing beam, 33-the third load-bearing beam, 34-the fourth load-bearing beam, 35-the fifth load-bearing beam, 36-reinforcing beam, 37-installation hole;

41-bearing screw rod, 42-bearing screw sleeve, 43-bearing slide block, 44-washer, 45-bearing nut;

51-horizontal actuator, 52-load sensor, 53-bearing screw, 54-hinge, 55-loading connecting plate.

Embodiments of the present invention

Referring to Fig. 1 to Fig. 5, a specific embodiment of a static test high-size and large-load adjustable load-bearing platform and a test method provided by the present invention will be described.

A high-size and large-load adjustable load-bearing platform for static tests, including a load-bearing ground rail 1, a loading support beam 2, a load-bearing beam 3, a load-bearing mechanism 4, and a loading mechanism 5, and the load-bearing platform is mounted on the load-bearing ground rail The installation of the test cabin is convenient, and the structural combination structure of the loading support beam and the load-bearing beam facilitates the adjustment of the longitudinal and lateral loading in the static loading test. scientific.

Among them, a plurality of loading support beams 2 and bearing beams 3 are built in layers from bottom to top, and some structures can be fixed by welding. Four first load-bearing beams 21 are arranged on the load-bearing ground rail 1, and two first load-bearing beams 31 are arranged in parallel above the first load-bearing beams 21, and the distance between the first load-bearing beams 31 is equal to the first load-bearing beam 21. The installation width of support beam 21. The four second load-bearing beams 22 are respectively installed above the first load-bearing beam, the second load-bearing beam 32 is fixed above the second load-bearing beam, the third load-bearing beam 33 is connected and fixed to the second load-bearing beam 32, and the third The load-bearing beam 33 and the second load-bearing beam 32 may be welded or screwed as required. The third load-bearing beam 22 is also arranged on the second load-bearing beam 32, the fourth load-bearing beam 34 and the fifth load-bearing beam 35 are arranged on the third load-bearing beam 22, and the loading mechanism 5 is arranged on the fourth load-bearing beam 34, The loading mechanism 5 determines the position of the loading center of mass.

The loading mechanism 5 includes a horizontal actuator 51, a load cell 52 and a load-bearing screw 53. The horizontal actuator 51 is vertically arranged with the fourth load-bearing beam 34, and the load cell 52 is arranged on the load-bearing screw 53 and the horizontal actuator. Between 51, the horizontal actuator 51 applies loads of different sizes as required. The load-bearing mechanism 4 comprises a load-bearing screw rod 41, a load-bearing screw sleeve 42 and a load-bearing slider 43, the load-bearing mechanism 4 connects the third load-bearing beam 33 and the load-bearing ground rail 1, the load-bearing mechanism 4 and the fourth load-bearing beam 34 is connected and matched with the application of longitudinal load, and the mounting holes 37 on the fourth load-bearing beam 34 are arranged along the arrangement direction of the load-bearing screws.

The load-bearing beam 3 includes a first load-bearing beam 31, a second load-bearing beam 32, a third load-bearing beam 33, a fourth load-bearing beam 34 and a fifth load-bearing beam 35, etc., and the loading support 2 includes a first load-bearing beam 21. The second loading support beam 22 and the third loading support 23. The load-bearing beam 3 is strip-shaped and has a plurality of mounting holes 37 arranged on the load-bearing beam to facilitate the installation of the loading mechanism and loading tooling. The first loading support beam 21 and the second loading support beam 22 are trapezoidal, and the four first loading support beams are symmetrically arranged in pairs, and the trapezoidal hypotenuse is on the inner side, that is, the middle side of the first load-bearing beam; the third loading support 23 It is stepped and trapezoidal, with upper and lower trapezoids arranged in rows, and the right-angled sides of the upper and lower trapezoids are on the same side. There are two fifth load-bearing beams 35, which are respectively arranged on the top and the side of the third loading support 23. The two fifth load-bearing beams 35 can be arranged in a staggered manner, and are specifically determined according to parameters such as the size of the test cabin body structure. Adjust according to actual needs. The fourth bearing beam 34 is arranged on the straight edge of the third loading support 23 and can be adjusted up and down to determine the height of the loading centroid. The first load-bearing beam 31 is in contact with the test base, and the test base is used to cooperate with the installation of the test cabin. The distance between the two first load-bearing beams 31 arranged in parallel is equal to the distance between the second load-bearing beams 32 arranged in parallel, which ensures the consistency and stability of the upper and lower structures of the load-bearing platform, and the bottom of the third load support 23 A reinforcement beam 36 is also provided to further ensure the stability of the third loading support structure.

The load-bearing mechanism 4 also includes a gasket 44 and a load-bearing nut 45. The load-bearing slider 43 is fixedly installed in cooperation with the load-bearing ground rail 1. The load-bearing screw 41 is connected and fixed by the load-bearing screw sleeve 42. The multi-section load-bearing screw 41 The connection matches the height of the third load-bearing beam 33, and the load-bearing screw sleeve 42 and the mounting hole 37 on the third load-bearing beam 33 are fixed by washers and load-bearing nuts. The load-bearing screw 41 connects and fixes the third load-bearing beam 33 and the load-bearing ground rail 1 along parallel straight lines, and the distance between the two load-bearing screws 41 is less than the length of the third load-bearing beam 33, and the distance is also smaller than the second load-bearing beam 33. The distance between the bearing beams 32. The load-bearing mechanism 4 ensures the stability of the overall loading process of the platform. When a vertical load is applied, the bearing capacity of the platform structure is greater, and the scope of the assessment test is expanded. At the same time, the disassembly and assembly of the load-bearing structure is also more flexible, which ensures the flexibility of loading the high-size and large-load test cabin.

The loading mechanism 5 also includes a hinge 54 and a loading connecting plate 55. The horizontal actuator 51 is fixed on the fourth load-bearing beam 34 through the loading connecting plate 55, and the loading connecting plate 55 and the load-bearing beam 3 may be fixed by structures such as bolts and nuts. , the mounting holes 37 on the bearing beam can be accurately positioned and installed. The end of the horizontal actuator 51 is equipped with a load cell 52, which can determine the size of the load, and the load-bearing screw 53 is connected to the horizontal actuator 51 through a hinge 54, so as to realize flexible loading and adapt to the structure of the test cabin. The relative position between the fourth load-bearing beam 34 and the third loading support 23 can also be adjusted as required, so as to adjust the position of the loading center of mass. The horizontal actuator can adjust the load size arbitrarily, and accurately realize the assessment of the test cabin.

A high-size, large-load adjustable load-bearing test method for a static test, using the above-mentioned high-size, large-load adjustable load-bearing platform for a static test, the steps include: building a load-bearing platform, and the construction of the load-bearing platform includes loading and supporting And the installation of the load-bearing beam, as well as the configuration and installation of the load-bearing mechanism and the loading mechanism. When carrying out the test, first match the test cabin with the test base, install and fix the test cabin, and then fix the loading tooling inside and outside the test cabin. According to the assessment requirements of the cabin, simulate the real loading situation. The longitudinal and transverse loading of the body is carried out synchronously, and the rationality of the cabin structure is assessed. Adjust the position of the loading mechanism, as well as the direction of lateral loading, and simultaneously load the longitudinal and lateral directions of the test cabin to check the rationality of the cabin structure. In the process of changing the loading direction, there is no need to disassemble and assemble all the loading tools, and there is no need to rotate the cabin, which improves the test efficiency of the assessment.

In the above test method, two loading assessments were carried out successively. The lateral loading direction in the first loading is the original lateral synchronous loading direction, and the lateral loading direction in the second loading is the adjusted lateral loading direction. The lateral loading direction is 90 degrees to the original lateral synchronous loading direction. The loading connecting plate and the bearing beam of the loading mechanism are positioned and the position of the loading center of mass is adjusted, and the loading mechanism can adjust the loading load.

The test platform and method utilize the combined splicing structure of loading support beams and load-bearing beams to build a test support platform. The splicing structure is light in weight and strong in bearing capacity. The detachable connection between the force mechanism and the loading mechanism is more flexible. In addition, the application of loads at different loading points can be completed by adjusting the position of the loading mechanism, which improves the efficiency and scientificity of the test.

Of course, the above descriptions are not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or replacements made by those skilled in the art within the scope of the present invention shall also belong to the present invention. protection scope of the invention.

Claims

A high-size, large-load adjustable load-bearing platform for static tests, characterized in that it includes a load-bearing ground rail, a loading support beam, a load-bearing beam, a load-bearing mechanism and a loading mechanism, and 4 Two first load-bearing beams are arranged in parallel above the first load-bearing beam; four second load-bearing beams are respectively installed above the first load-bearing beam, and the second load-bearing beam is fixed on the second load-bearing beam. Above the loading support beam, the third load-bearing beam is connected and fixed to the second load-bearing beam; the third load-bearing beam is also arranged on the second load-bearing beam, and the fourth load-bearing beam and the fifth load-bearing beam are arranged on the third load-bearing beam , a loading mechanism is set on the fourth load-bearing beam; the loading mechanism includes a horizontal actuator, a load cell and a load-bearing screw, the horizontal actuator is vertically arranged with the fourth load-bearing beam, and the load-measuring sensor is arranged on the load-bearing screw and between the horizontal actuator; the load-bearing mechanism includes a load-bearing screw, a load-bearing screw sleeve and a load-bearing slider, and the load-bearing mechanism connects the third load-bearing beam and the load-bearing ground rail.
According to claim 1, a static test high-size and large-load adjustable load-bearing platform is characterized in that the load-bearing beam includes a first load-bearing beam, a second load-bearing beam, a third load-bearing beam, The fourth bearing beam and the fifth bearing beam; the loading support includes a first loading support beam, a second loading support beam and a third loading support.
According to claim 2, the static test high-size and large-load adjustable load-bearing platform is characterized in that, the load-bearing beam is strip-shaped and arranged with a plurality of mounting holes, and the first loading support beam The second loading support beam is trapezoidal, and the third loading support is step-trapezoidal.
According to claim 2, a static test high-size and large-load adjustable load-bearing platform is characterized in that there are two fifth load-bearing beams, which are respectively arranged on the top and side of the third loading support; The fourth bearing beam is arranged on the straight edge of the third loading support.
According to claim 2, a static test high-size and large-load adjustable load-bearing platform is characterized in that, the first load-bearing beam is in contact with the test base; two first load-bearing beams arranged in parallel The distance between them is equal to the distance between the second bearing beams arranged in parallel; the bottom of the third loading support is also provided with a reinforcing beam.
According to claim 1, a static test high-size and large-load adjustable load-bearing platform is characterized in that, the load-bearing mechanism also includes a gasket and a load-bearing nut, and the load-bearing slider is in contact with the load-bearing ground rail. Cooperate, the load-bearing screw rod is connected and fixed by the load-bearing screw sleeve, and the mounting hole on the load-bearing screw sleeve and the third load-bearing beam is fixed by a gasket and a load-bearing nut.
According to claim 1, a static test high-size and large-load adjustable load-bearing platform is characterized in that the loading mechanism also includes a hinge and a loading connecting plate, and the horizontal actuator is fixed on the fourth connecting plate through the loading connecting plate. On the load-bearing beam, the end of the horizontal actuator is equipped with a load cell, and the load-bearing screw is connected to the horizontal actuator through a hinge.
An adjustable load-bearing test method for a static test with a high size and a large load, using the adjustable load-bearing platform for a static test with a high size and a large load according to any one of claims 1 to 7, characterized in that the steps include: The test cabin cooperates with the test base, fixes the loading tool inside and outside the test cabin, loads the test cabin vertically and horizontally synchronously, checks the rationality of the cabin structure; adjusts the position of the loading mechanism, and adjusts the direction of lateral loading , the longitudinal and transverse loading of the test cabin is carried out synchronously to check the rationality of the cabin structure.
The static test method according to claim 8, characterized in that the adjusted lateral loading direction is 90 degrees from the original lateral synchronous loading direction.
According to claim 8, a static test method with high size and large load adjustable load-bearing test method is characterized in that, the loading connecting plate and load-bearing beam of the loading mechanism are positioned and the position of the loading center of mass is adjusted, and the loading mechanism adjusts Load payload size.