CN111307431A

CN111307431A - Supporting device for four-side simply-supported boundary condition test

Info

Publication number: CN111307431A
Application number: CN202010120676.XA
Authority: CN
Inventors: 杜绍君; 李凤明; 柴玉阳
Original assignee: Harbin Engineering University
Current assignee: Harbin Engineering University
Priority date: 2020-02-26
Filing date: 2020-02-26
Publication date: 2020-06-19

Abstract

The invention discloses a four-side simply-supported boundary condition test device, relates to a supported test device, and aims to solve the problems that the four-side simply-supported boundary condition test device is quite absent in the conventional plate member mechanical experiment, the conventional simply-supported support device is fixed in size, cannot adapt to plate test pieces with different sizes, and is not high in universality. The invention belongs to the technical field of mechanical test devices. The periphery of the experimental plate model is in line contact with the supporting device, no additional accessory component is arranged, the simply supported boundary condition of the experimental model is realized, and the interference is small.

Description

Supporting device for four-side simply-supported boundary condition test

Technical Field

The invention relates to a test piece mounting device in a mechanical experiment, in particular to a four-side simply-supported boundary condition test supporting device, and belongs to the technical field of mechanical test devices.

Background

In scientific research and engineering practice, for the research of the static and dynamic characteristics of a specific plate structure, in addition to using a theoretical analysis method, experimental verification is often required to ensure the accuracy and reliability of an analysis result. Whether the experimental conditions are reasonable or not and whether the theoretical analysis hypothesis is met or not influences the accuracy of the experimental result to a great extent. The four-side simply-supported boundary condition experiment device for the plate type component is quite vacant, the existing simply-supported supporting devices are fixed in size, cannot adapt to plate type test pieces of different sizes, and is low in universality and high in test cost.

Disclosure of Invention

The invention provides a four-side simply-supported mechanical experiment supporting device, which aims to solve the problems that the four-side simply-supported boundary condition experiment device in the existing plate member mechanical experiment is quite vacant, the existing simply-supported supporting devices are all in fixed sizes, cannot adapt to plate test pieces with different sizes, and is not strong in universality.

The technical scheme adopted by the invention for solving the problems is as follows:

the utility model provides a four sides simply support experimental strutting arrangement of boundary condition includes four long supports and four support piece, every long support is the rectangular plate body, and the head and the tail of four long supports connect gradually into the rectangle framework, and the length direction reciprocating motion of an adjacent long support inside wall can be followed to the tip of every long support, and support piece is all installed to the inside wall of every long support.

Furthermore, the side wall of each long support is provided with a long strip-shaped sliding groove.

Furthermore, a plurality of first through holes are uniformly distributed in the side wall of each long support along the length direction of the side wall, and the through holes are located above the long strip-shaped sliding groove.

Furthermore, the test device also comprises four adjusting bolts, a threaded hole is formed in the end part of each long support, and one end of each connecting bolt penetrates through the long strip-shaped sliding groove and then is connected with the threaded hole.

Furthermore, each supporting piece comprises a rectangular plate body and a triangular protrusion, the triangular protrusion is arranged on the upper surface of the rectangular plate body, a plurality of second threaded holes matched with the first through holes are formed in the back surface of the rectangular plate body along the length direction of the back surface of the rectangular plate body, and the connecting bolts penetrate through the long support through holes to be matched and fixed with the threaded holes.

The invention has the beneficial effects that:

1. the periphery of the experimental plate model is in line contact with the supporting device of the invention, no additional accessory component is provided, the simple supporting boundary condition of the experimental model is realized, and the interference is small;

2. one end of each long support is matched with the sliding groove of the adjacent long support through an adjusting bolt, so that four sides of plates with different widths and lengths can be simply supported;

3. the experimental device only has line contact with the periphery of an experimental component, has no other interference, and has no limitation on the thickness of the experimental component, so that the device can simply support four sides of an experimental plate with any thickness, and has strong universality;

4. the method has low cost and simple operation, and can save scientific research expenses of related experiments.

Drawings

FIG. 1 is a top view of the overall structure of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is an isometric view of the present invention;

fig. 4 is a schematic structural view of a wedge-shaped support.

Detailed Description

The first embodiment is as follows: the four-side simple support boundary condition testing device of the embodiment is described by combining fig. 1 to fig. 4, and comprises four long supports 1 and four supporting pieces 2, wherein each long support 1 is a rectangular plate body, the four long supports 1 are sequentially connected end to form a rectangular frame body, the end part of each long support 1 can linearly reciprocate along the length direction of the inner side wall of one adjacent long support 1, and the supporting pieces 2 are installed on the inner side wall of each long support 1.

Four 1 lower parts of long support all are equipped with the spout, four long supports 1 are the base that the rectangle framework is whole device after connecting, four wedge-shaped support piece 2 pass through the bolt fastening on the inside wall of four long supports, the four sides that need carry out the experimental test board model of four sides letter support boundary condition must set up long V-arrangement groove, cooperate with four wedge-shaped support piece's wedge salient, adjusting bolt 4 through adjusting the fixed position of 1-1 within range at rectangular shape spout with the tip that long support piece 1 links to each other, with the relative distance of adjusting four support piece, thereby realize the adaptation to different size test board models, the four sides letter boundary condition of board test piece has been realized promptly.

The second embodiment is as follows: the present embodiment is described with reference to fig. 2 and 3, and the side wall of each long support 1 of the present embodiment is provided with an elongated sliding groove 1-1.

Other components and connections are the same as those in the first embodiment.

The third concrete implementation mode: referring to fig. 2 and 3, the embodiment is described, in which a plurality of first through holes 1-2 are uniformly distributed along the length direction of the side wall of each long support 1, and the plurality of through holes 1-2 are located above the strip-shaped chute 1-1.

Other components are connected in the same manner as in the first or second embodiment.

The fourth concrete implementation mode: the embodiment is described with reference to fig. 1 to 2, the testing apparatus of the embodiment further includes four adjusting bolts 4, a threaded hole 1-3 is formed at an end of each long support 1, and one end of each adjusting bolt 4 passes through the elongated sliding groove 1-1 and then is connected with the threaded hole 1-3.

Other components and connection relationships are the same as those in the first, second or third embodiment.

The fifth concrete implementation mode: referring to fig. 4, the embodiment is described, wherein each supporting member 2 of the embodiment includes a rectangular plate body 2-1 and a wedge-shaped protrusion 2-2, the upper surface of the rectangular plate body 2-1 is provided with a triangular protrusion 2-2, and the rectangular plate body 2-1 is provided with a plurality of second threaded holes 2-1-1 corresponding to the first through holes 1-2 along the length direction thereof.

The support 2 is fixedly connected with the inner side wall of the long support 1 through a fixing bolt 5.

Other components and connections are the same as those of the first, second, third or fourth embodiments.

The four sides of a test board model needing to be subjected to the four-side simple support boundary condition test are provided with long V-shaped grooves, and the tip parts of wedge-shaped protrusions 2-1 of the supporting pieces 2 are embedded into the long V-shaped grooves on the four sides of the test board and are kept in tight fit; the end part of the long support 1 slides in the range of the strip-shaped sliding groove 1-1 by adjusting the connecting bolt 4 so as to adjust the relative distance of the four supporting pieces, thereby realizing the adaptation of test board models with different sizes, screwing the four connecting bolts 4 after adjusting to proper positions, and finishing the firm connection of the whole device, namely realizing the simply supported boundary condition of four sides of the board.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a four sides simply support experimental strutting arrangement of boundary condition which characterized in that: the four-side simply-supported boundary condition testing device comprises four long supports (1) and four supporting pieces (2), wherein each long support (1) is a rectangular plate body, the head and the tail of the four long supports (1) are sequentially connected into a rectangular frame body, the end part of each long support (1) can move in a reciprocating linear mode along the length direction of the inner side wall of the adjacent long support (1), and the supporting pieces (2) are installed on the inner side wall of each long support (1).

2. The testing device for the boundary condition of the four-sided simple support according to claim 1, wherein: the side wall of each long support (1) is provided with a long strip-shaped sliding chute (1-1).

3. The testing device for the boundary condition of the four-sided simple support according to claim 2, wherein: the side wall of each long support (1) is uniformly provided with a plurality of first through holes (1-2) along the length direction, and the through holes (1-2) are positioned above the strip-shaped sliding groove (1-1).

4. A four-sided simple-supported boundary condition testing apparatus according to claim 2 or 3, wherein: the testing device further comprises four adjusting bolts (4), a threaded hole (1-3) is formed in the end portion of each long support (1), and one end of each adjusting bolt (4) penetrates through the long strip-shaped sliding groove (1-1) and then is connected with the threaded hole (1-3).

5. The testing device for the boundary condition of the four-sided simple support according to claim 1, wherein: each supporting piece (2) comprises a rectangular plate body (2-1) and wedge-shaped protrusions (2-2), the wedge-shaped protrusions (2-1) are arranged on the upper surface of the rectangular plate body (2-1), a plurality of second threaded holes (2-1-1) corresponding to the first through holes (1-2) are formed in the back surface of the rectangular plate body (2-1) along the length direction of the back surface, and fixing bolts penetrate through the first through holes (1-2) to be matched with the second threaded holes (2-1-1) to enable the supporting pieces (2) to be tightly connected with the long supporting base (1).