CN109297821B - A test device for simulating axial compression of stiffened plates - Google Patents
A test device for simulating axial compression of stiffened plates Download PDFInfo
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- CN109297821B CN109297821B CN201811472844.0A CN201811472844A CN109297821B CN 109297821 B CN109297821 B CN 109297821B CN 201811472844 A CN201811472844 A CN 201811472844A CN 109297821 B CN109297821 B CN 109297821B
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- 238000012360 testing method Methods 0.000 title claims abstract description 66
- 230000006835 compression Effects 0.000 title claims abstract description 26
- 238000007906 compression Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 22
- 238000004088 simulation Methods 0.000 claims description 4
- 238000012669 compression test Methods 0.000 abstract description 5
- 239000013589 supplement Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 238000011160 research Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
本发明涉及薄壁加筋结构强度测试技术领域，具体指一种模拟轴向压缩加筋板试验装置；包括左纵梁、右纵梁、前横梁、后横梁、MTS四通道加载机和试件，所述左纵梁和右纵梁相互平行且间隔设置，前横梁和后横梁的两端分别连接左纵梁和右纵梁从而构成一体的加载框架；所述MTS四通道加载机和试件设于加载框架内，MTS四通道加载机与前横梁固定连接，试件与后横梁固定连接；所述试件的两侧均设有方钢，方钢上设有夹持试件的夹具；本发明结构合理，适用于不同尺寸的加筋板的轴压试验，对轴向压缩加筋板的长边施加简支边界条件是对当前加载方案是一种很好的补充，可以很好地模拟轴向压缩加筋板的长边简支边界条件，提高试验精度和效率。
The invention relates to the technical field of strength testing of thin-walled reinforced structures, in particular to a reinforced plate test device for simulating axial compression; including a left longitudinal beam, a right longitudinal beam, a front beam, a rear beam, an MTS four-channel loader and a test piece , the left longitudinal beam and the right longitudinal beam are parallel to each other and arranged at intervals, and the two ends of the front beam and the rear beam are respectively connected to the left longitudinal beam and the right longitudinal beam to form an integrated loading frame; the MTS four-channel loader and the test piece Set in the loading frame, the MTS four-channel loader is fixedly connected with the front beam, and the test piece is fixedly connected with the rear beam; the two sides of the test piece are provided with square steel, and the square steel is provided with a fixture for holding the test piece; The invention has a reasonable structure and is suitable for the axial compression test of stiffened plates of different sizes. The simply supported boundary conditions are applied to the long sides of the axially compressed stiffened plates, which is a good supplement to the current loading scheme, and can be well Simulate long-side simply supported boundary conditions of axially compressed stiffened plates to improve test accuracy and efficiency.
Description
Technical Field
The invention relates to the technical field of strength testing of thin-wall reinforced structures, in particular to a test device for simulating axial compression of a stiffened plate.
Background
The shipbuilding industry in the world is developed day by day, but has unfortunate information of material loss and even personnel casualty caused by the damage and the fracture of the hull structure, so that the structural strength of the hull is always a popular problem researched by colleges and scientific research institutions in both civil and military fields. Buckling and ultimate strength of a hull plate and a stiffened plate are important contents of hull structure strength design, axial compression buckling failure of the stiffened plate is one of the most main causes of integral buckling failure of a hull beam, and therefore buckling and ultimate strength evaluation of plate lattices between reinforcing ribs under axial compression load is very important.
The hull is a thin-wall box-shaped beam structure consisting of a plurality of stiffened plates, and aiming at the buckling and ultimate strength of the hull, scientific researchers usually extract a hull beam deck to be used as an independent stiffened plate to research the hull beam deck. For the research on the buckling and ultimate strength of the stiffened plate, a method for applying load by axial compression is adopted, and the axial compression test of the stiffened plate described in the current literature basically does not apply any constraint on the long side, so that the simulation of the actual boundary condition is very inaccurate, and the tool is relatively single and has low applicability. The more accurate method is to adopt the boundary conditions of solid support for the short side and simple support for the long side of the stiffened plate, which is the most simplified method applied in the current engineering to research the buckling and ultimate strength of the hull structure. The failure process of axial compression buckling of the stiffened plate comprises the coupling problem of geometric nonlinearity and material nonlinearity, although a finite element method in the current stage can obtain a relatively accurate result, the finite element method is a black box at the bottom, and the coupling influence of the two nonlinearities is not very clear, so that some theories or guesses need to be verified through tests.
Disclosure of Invention
The invention aims to provide a set of axial compression stiffened plate simulation test device for applying simple support boundary conditions to the long edge of an axial compression stiffened plate and applying fixed support boundary conditions to the short edge of the axial compression stiffened plate, aiming at overcoming the defects and shortcomings of the prior art, and effectively solving the problems of inaccurate boundary condition simulation, low universality of the test device, low test efficiency and the like in an axial compression stiffened plate test.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to a test device for simulating an axial compression stiffened plate, which comprises a left longitudinal beam, a right longitudinal beam, a front cross beam, a rear cross beam, an MTS four-channel loading machine and a test piece, wherein the left longitudinal beam and the right longitudinal beam are parallel to each other and arranged at intervals, and two ends of the front cross beam and the rear cross beam are respectively connected with the left longitudinal beam and the right longitudinal beam to form an integrated loading frame; the MTS four-channel loading machine and the test piece are arranged in the loading frame, the MTS four-channel loading machine is fixedly connected with the front cross beam, and the test piece is fixedly connected with the rear cross beam; the two sides of the test piece are both provided with square steel, and the square steel is provided with a clamp for clamping the test piece.
According to the scheme, the left longitudinal beam and the right longitudinal beam are fixed on the ground, and the relative height between the two ends of the left longitudinal beam and the ground is adjusted through the jacks, so that the loading frame is leveled to be parallel to the ground.
According to the scheme, a ground groove is formed in the ground in the loading frame, a left slide way and a right slide way are arranged in the ground groove, and the left slide way and the right slide way are fixed on the ground groove through bolts; all be equipped with a plurality of fixed orificess on left side slide and the right slide, the square steel of test piece both sides sets up respectively on left side slide and right slide, and two square steels pass through the bolt and connect respectively on the fixed orifices of left side slide and right slide.
According to the scheme, the left longitudinal beam and the right longitudinal beam are correspondingly provided with a plurality of fixing holes which are sequentially distributed at intervals along the longitudinal direction, the front cross beam and the rear cross beam are arranged in parallel, and the two ends of the front cross beam and the rear cross beam are respectively connected to the fixing holes of the left longitudinal beam and the right longitudinal beam through bolts.
According to the scheme, the clamp comprises an upper pressing strip and a lower pressing strip, the upper pressing strip and the lower pressing strip are clamped on the upper surface and the lower surface of the side edge of the test piece respectively, and the upper pressing strip and the lower pressing strip are fixedly connected to the square steel through bolts.
The invention has the beneficial effects that: the axial compression loading device is reasonable in structure, is suitable for axial compression tests of stiffened plates with different sizes, applies simple support boundary conditions to the long edge of the axial compression stiffened plate, is a good supplement to the current loading scheme, can not only aim at test pieces with a series of sizes, but also well simulate the long edge simple support boundary conditions of the axial compression stiffened plate, is wide in application range, reduces test cost, and improves test precision and efficiency.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged view of the square steel and the clamp of the present invention;
fig. 3 is a schematic top view of the present invention.
In the figure:
1. loading a frame; 2. an MTS four-channel loader; 3. a test piece; 4. square steel; 11. a left stringer; 12. a right stringer; 21. a front cross member; 22. a rear cross member; 41. a clamp; 42. a left slideway; 43. a right slideway; 44. pressing strips; 45. and pressing the strips.
Detailed Description
The technical solution of the present invention is described below with reference to the accompanying drawings and examples.
As shown in fig. 1, the test device for simulating an axial compression stiffened plate, provided by the invention, comprises a left longitudinal beam 11, a right longitudinal beam 12, a front cross beam 21, a rear cross beam 22, an MTS four-channel loading machine 2 and a test piece 3, wherein the left longitudinal beam 11 and the right longitudinal beam 12 are parallel to each other and are arranged at intervals, and two ends of the front cross beam 21 and the rear cross beam 22 are respectively connected with the left longitudinal beam 11 and the right longitudinal beam 12 to form an integrated loading frame 1; the MTS four-channel loading machine 2 and the test piece 3 are arranged in the loading frame 1, the MTS four-channel loading machine 2 is fixedly connected with the front cross beam 21, and the test piece 3 is fixedly connected with the rear cross beam 22; the two sides of the test piece 3 are both provided with square steels 4, and the square steels 4 are provided with clamps 41 for clamping the test piece 3; the front cross beam 21 and the rear cross beam 22 can adjust the size of the loading frame 1 according to the specification of the test piece 3, and after the size of the test piece 3 is determined, the front cross beam 21 and the rear cross beam 22 are moved to appropriate positions and then fixedly connected with the left longitudinal beam 11 and the right longitudinal beam 12 through bolts; the MTS four-channel loader 2 is integrally connected with the loading frame 1 through the front cross beam 21 so as to be parallel to the ground, the MTS four-channel loader 2 is used for loading the load required by the axial compression stiffened plate test, and the loading mode of the MTS four-channel loader 2 is loaded with load control loading and displacement control loading; the fixed connection of the test piece 3 and the rear cross beam 22 ensures the solid-support boundary condition of the stiffened plate; and the square steel 4 clamps the long edge of the test piece 3 through the clamp 41 and forms line contact with the long edge of the test piece so as to simulate the simply supported boundary condition of the long edge of the axial compression stiffened plate.
The left longitudinal beam 11 and the right longitudinal beam 12 are fixed on the ground, and the relative height between the two ends of the left longitudinal beam 11 and the ground is adjusted by the left longitudinal beam 12 and the right longitudinal beam 12 through a jack, so that the loading frame 1 is leveled to be parallel to the ground; the leveling device of the loading frame 1 is used for controlling the loading direction of the loading frame and the MTS four-channel loading machine 2, so that the axial pressure is horizontally and axially loaded on the test piece 3 to ensure the test accuracy.
A ground groove is formed in the ground in the loading frame 1, a left slide rail 42 and a right slide rail 43 are arranged in the ground groove, and the left slide rail 42 and the right slide rail 43 are fixed on the ground groove through bolts; the left slideway 42 and the right slideway 43 are both provided with a plurality of fixing holes, the square steel 4 on two sides of the test piece 3 are respectively arranged on the left slideway 42 and the right slideway 43, and the two square steel 4 are respectively connected with the fixing holes of the left slideway 42 and the right slideway 43 through bolts; as shown in fig. 2, the square steel 4 can slide left and right along the left slideway 42 and the right slideway 43 through the T-shaped groove, so that the final position is determined according to the size of the test piece 3 and then fixed by bolts, thereby meeting the test requirements of stiffening plates of various specifications and reducing the test cost input.
The left longitudinal beam 11 and the right longitudinal beam 12 are correspondingly provided with a plurality of fixing holes, the fixing holes are sequentially distributed at intervals along the longitudinal direction, the front cross beam 21 and the rear cross beam 22 are arranged in parallel, two ends of the front cross beam 21 and the rear cross beam 22 are respectively connected onto the fixing holes of the left longitudinal beam 11 and the right longitudinal beam 12 through bolts, the positions of the front cross beam 21 and the rear cross beam 22 on the longitudinal beams can be longitudinally adjusted, and therefore the size of the loading frame 1 is constructed according to the specifications of the test piece 3, the test requirements of the test pieces 3 with various specifications are met, and the test cost is reduced.
The clamp 41 comprises an upper pressing strip 44 and a lower pressing strip 45, the upper pressing strip 44 and the lower pressing strip 45 are respectively clamped on the upper surface and the lower surface of the side edge of the test piece 3, and the upper pressing strip 44 and the lower pressing strip 45 are fixedly connected to the square steel 4 through bolts; the upper pressing strip 44 and the lower pressing strip 45 respectively clamp the long edges of the two ends of the stiffened plate to form line contact, so that the simply supported boundary condition of the long edge of the axial compression test piece is accurately simulated, and an axial compression stiffened plate test can be accurately carried out.
The axial compression method is suitable for axial compression tests of stiffened plates with different sizes, and the application of simple boundary conditions to the long edge of the axially compressed stiffened plate is a good supplement to the current loading scheme; and the method is also the simplified method which is most applied in the current engineering to research the buckling and ultimate strength of the ship hull structure. Therefore, a set of device for applying the simple supporting boundary condition to the long edge of the axial compression stiffened plate is designed, the long edge simple supporting boundary condition of the axial compression stiffened plate can be well simulated for test pieces of a series of sizes, the application range is wide, the test cost is reduced, and the test precision and efficiency are improved.
The above description is only a preferred embodiment of the present invention, and all equivalent changes or modifications of the structure, characteristics and principles described in the present invention are included in the scope of the present invention.
Claims (3)
1. The utility model provides a simulation axial compression stiffened plate test device, includes left longeron (11), right longeron (12), front beam (21), rear frame member (22), MTS four-channel loader (2) and test piece (3), its characterized in that: the left longitudinal beam (11) and the right longitudinal beam (12) are parallel to each other and arranged at intervals, and two ends of the front cross beam (21) and the rear cross beam (22) are respectively connected with the left longitudinal beam (11) and the right longitudinal beam (12) to form an integrated loading frame (1); the MTS four-channel loading machine (2) and the test piece (3) are arranged in the loading frame (1), the MTS four-channel loading machine (2) is fixedly connected with the front cross beam (21), and the test piece (3) is fixedly connected with the rear cross beam (22); both sides of the test piece (3) are provided with square steels (4), and the square steels (4) are provided with clamps (41) for clamping the test piece (3);
the left longitudinal beam (11) and the right longitudinal beam (12) are fixed on the ground, and the relative height between the two ends of the left longitudinal beam (11) and the right longitudinal beam (12) and the ground is adjusted through a jack, so that the loading frame (1) is leveled to be parallel to the ground;
a ground groove is formed in the ground in the loading frame (1), a left slide way (42) and a right slide way (43) are arranged in the ground groove, and the left slide way (42) and the right slide way (43) are fixed on the ground groove through bolts; all be equipped with a plurality of fixed orificess on left side slide (42) and right slide (43), square steel (4) of test piece (3) both sides set up respectively on left side slide (42) and right slide (43), and just two square steel (4) are connected respectively through the bolt on the fixed orifices of left side slide (42) and right slide (43), square steel (4) can follow left side slide (42) and right slide (43) through the T-slot and carry out the horizontal slip regulation.
2. The test device for simulating the axial compression stiffened plate according to claim 1, wherein: the left longitudinal beam (11) and the right longitudinal beam (12) are correspondingly provided with a plurality of fixing holes which are distributed at intervals in sequence along the longitudinal direction, the front cross beam (21) and the rear cross beam (22) are arranged in parallel, and the two ends of the front cross beam (21) and the rear cross beam (22) are respectively connected to the fixing holes of the left longitudinal beam (11) and the right longitudinal beam (12) through bolts.
3. The test device for simulating the axial compression stiffened plate according to claim 1, wherein: the clamp (41) comprises an upper pressing strip (44) and a lower pressing strip (45), the upper pressing strip (44) and the lower pressing strip (45) are respectively clamped on the upper surface and the lower surface of the side edge of the test piece (3), and the upper pressing strip (44) and the lower pressing strip (45) are fixedly connected onto the square steel (4) through bolts.
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| CN201811472844.0A CN109297821B (en) | 2018-12-04 | 2018-12-04 | A test device for simulating axial compression of stiffened plates |
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| CN201811472844.0A CN109297821B (en) | 2018-12-04 | 2018-12-04 | A test device for simulating axial compression of stiffened plates |
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| CN109297821B true CN109297821B (en) | 2021-05-04 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110455633A (en) * | 2019-08-13 | 2019-11-15 | 武汉理工大学 | Composite plate compression test tooling |
| CN110852012A (en) * | 2019-11-11 | 2020-02-28 | 武汉理工大学 | Prediction Method of Ultimate Strength of Axial Compression Stiffened Plates |
| CN110779792A (en) * | 2019-12-11 | 2020-02-11 | 哈尔滨理工大学 | A fixture for impact test of grid stiffened plate |
| CN112730059A (en) * | 2020-12-22 | 2021-04-30 | 南京航空航天大学 | Axial pressure test device and method for stiffened plate with typical structure of airplane |
| CN113624606B (en) * | 2021-08-19 | 2025-05-16 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | A wall panel compression stability test device |
| CN113933165A (en) * | 2021-09-13 | 2022-01-14 | 中山大学 | A biaxial loading test device for composite honeycomb sandwich structure |
| CN114383829A (en) * | 2021-12-15 | 2022-04-22 | 江苏科技大学 | An ultimate strength test device for key joint structures |
| CN116625818B (en) * | 2023-05-10 | 2025-06-13 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | A compression test device for composite laminates with large aspect ratio |
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| CN203894097U (en) * | 2014-03-27 | 2014-10-22 | 中国航空工业集团公司沈阳飞机设计研究所 | Test piece loading control device for stiffened plate compression test |
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