High-rise structure for simulating high-order modal dynamic response, elastic experiment device and vibration test bench

Abstract

The invention discloses a high-rise structure for simulating high-order modal dynamic response. The high-rise structure comprises a framework and a wall body mounted on the framework, the framework comprises at least two layers of framework units; each skeleton unit comprises a central column and at least three cross beams which are annularly and uniformly mounted on the central column; the two central columns of the two adjacent layers of framework units can relatively rotate in any direction; a spring is arranged between the two corresponding cross beams of the two adjacent layers of framework units, and the two ends of the spring are connected with the two corresponding cross beams. The invention further discloses an elastic experimental device for simulating the high-order modal dynamic response, the elastic experimental device comprises a three-dimensional aeroelastic device and the high-rise structure for simulating the high-order modal dynamic response, and the high-rise structure is installed on the three-dimensional aeroelastic device. The invention further discloses a vibration test bed for simulating the high-order modal dynamic response. The high-rise structure for simulating the high-order modal dynamic response is installed on the vibration test bed.

Description

Technical Field

[0001] The invention belongs to the technical field of structural modal analysis, and specifically relates to a high-rise structure, an elastic experimental device and a vibration test bench for simulating high-order modal dynamic response. Background Art

[0002] With the development of building structure science and technology, a large number of large-scale tall structures such as high-rise / super-high-rise buildings have been built. Since such flexible structures have the characteristics of long period, low damping and vibration sensitivity, they often participate in multi-mode when the structure vibrates. Therefore, it is particularly important to master the modal information of such buildings. Especially when the structure is subjected to wind loads, seismic loads and other factors, the contribution of high-order modes to the dynamic response of the structure cannot be ignored. How to select the high-order modes that contribute more to the structural response from the numerous high-order modes requires that the experimental device has the conditions to simulate the high-order modes of tall structures.

[0003] Traditional experimental devices can usually simulate the first-order mode (fundamental frequency) of unidirectional or multi-directional vibration. However, in fact, under the action of wind load or seismic waves, high-order modal vibrations above the fundamental frequency are often excited. Therefore, the existing experimental devices cannot meet the requirements of high-order modal simulation of structures in one direction or in multiple directions. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a high-rise structure, an elastic experimental device and a vibration test bench for simulating high-order modal dynamic response, which can realize the simulation of high-order modal dynamic response of multi-degree-of-freedom vibration of high-rise buildings.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention first proposes a high-rise structure for simulating high-order modal dynamic response, comprising a frame and a wall mounted on the frame; the frame comprises at least two layers of frame units; the frame unit comprises a central column and at least three beams evenly distributed in an annular manner mounted on the central column;

[0007] The two central columns of the frame units of two adjacent layers can rotate relative to each other in any direction; a spring is provided between the corresponding two cross beams of the frame units of two adjacent layers, and both ends of the spring are connected to the corresponding two cross beams.

[0008] Furthermore, both ends of the central column are respectively provided with mutually matching spherical sockets and spherical plugs; the lower end of the central column of the skeleton unit located on the upper layer and the upper end of the central column of the skeleton unit located on the lower layer are plug-connected through the spherical sockets and spherical plugs.

[0009] Further, the number of the crossbeams is an even number, the elastic coefficients and lengths of the springs connected to two of the crossbeams located on the same straight line are equal, and the distances between the connection points between the springs and the crossbeams and the center column are equal; or, the number of the crossbeams is an odd number, the elastic coefficients and lengths of the springs connected to all of the crossbeams are equal, and the distances between the connection points between the springs and the crossbeams and the center column are equal.

[0010] Furthermore, a spring hook connected to the spring is provided on the crossbeam.

[0011] Furthermore, at least one spring is provided between corresponding two beams of two adjacent layers of the skeleton units.

[0012] Further, the wall is a plane wall composed of planes around the frame; or, the wall is a curved wall composed of curved surfaces around the frame; or, the wall is a mixed surface wall composed of planes and curved surfaces around the frame.

[0013] The present invention also proposes an elastic experimental device for simulating high-order modal dynamic response, including a three-dimensional gas-elastic device and a towering structure for simulating high-order modal dynamic response as described above, wherein the towering structure is installed on the three-dimensional gas-elastic device.

[0014] Furthermore, the three-dimensional gas-elastic device includes a core column, which can vibrate along mutually perpendicular X-axis and Y-axis directions and torsionally vibrate around its axis along the T direction; the central column of the skeleton unit located at the bottom layer is fixedly connected to the core column.

[0015] The present invention also provides a vibration test bench for simulating high-order modal dynamic response, on which the towering structure for simulating high-order modal dynamic response as described above is installed.

[0016] Furthermore, the central column of the skeleton unit located at the lowest layer is fixedly connected to the vibration test bench.

[0017] The beneficial effects of the present invention are:

[0018] The present invention simulates the high-order modal dynamic response of a tall structure by setting the skeleton to at least two layers of skeleton units, and allowing the central columns of two adjacent layers of skeleton units to rotate relative to each other in any direction and to move relative to each other in the axial direction, and at the same time installing springs between the corresponding crossbeams of the two adjacent layers of skeleton units, so that the tension applied by the springs to the crossbeams constrains the relative movement between the central columns; in this way, the multi-degree-of-freedom vibration between adjacent skeleton units can be utilized to realize the simulation of the high-order modal dynamic response, thereby solving the problem that the existing experimental device cannot simulate the high-order modal information of the tall structure.

[0019] The elastic experimental device for simulating high-order modal dynamic response of the present invention can meet the vibration experimental requirements of obtaining the first-order mode and high-order mode of the structural response of the tall structure in multiple degrees of freedom such as crosswind direction, downwind direction and torsional direction at the same time by installing the tall structure on the three-dimensional gas-elastic device.

[0020] The vibration test bench for simulating high-order modal dynamic response of the present invention can simulate the high-order modal dynamic response of a tall structure under seismic waves. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0022] Figure 1 A schematic structural diagram of an embodiment of a towering structure for simulating high-order modal dynamic response of the present invention;

[0023] Figure 2 for Figure 1 AA section view;

[0024] Figure 3 for Figure 1 axonometric drawing;

[0025] Figure 4 It is the front view of the skeleton;

[0026] Figure 5 This is an axonometric view of the skeleton;

[0027] Figure 6 It is a schematic diagram of the structure of the skeleton unit;

[0028] Figure 7 It is a structural schematic diagram of the elastic experimental device for simulating high-order modal dynamic response of the present invention;

[0029] Figure 8 for Figure 7 Axonometric drawing of .

[0030] Description of reference numerals:

[0031] 1-wall; 2-frame; 21-center column; 22-crossbeam; 23-spring; 24-hook; 25-spherical slot; 26-spherical plug; 3-three-dimensional gas elastic device; 31-core column; 32-connecting plate. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0033] Example 1

[0034] like Figure 1-6 As shown, the present embodiment simulates a high-rise structure of a high-order modal dynamic response, including a frame 2 and a wall 1 installed on the frame 2. The frame 2 includes at least two layers of frame units 20. Specifically, in the present embodiment, the frame unit 20 includes a central column 21 and at least three beams 22 evenly distributed in an annular manner installed on the central column 21. In the present embodiment, the frame unit 20 is set to 7 layers. Of course, in some other embodiments, the number of layers of the frame unit 20 can also be set to 2 layers, 3 layers, 4 layers, 5 layers, 6 layers, 7 layers or more, etc. The specific number of layers of the frame unit 20 is set according to actual needs and will not be repeated.

[0035] The two central columns 21 of two adjacent layers of skeleton units 20 can rotate relative to each other in any direction. Figure 4-5 As shown, in order to impose constraints on the two center columns 21 of the two adjacent layers of skeleton units 20, a spring 23 is provided between the two corresponding beams 22 of the two adjacent layers of skeleton units 20 in this embodiment, and the two ends of the spring 23 are connected to the two corresponding beams 22. In the preferred implementation of this embodiment, a spring hook 24 connected to the spring 23 is provided on the beam 22, and the two ends of the spring 23 are respectively connected to the two corresponding beams 22 through the spring hook 24. At least one spring 23 is provided between the two corresponding beams 22 of the two adjacent layers of skeleton units 20. In this embodiment, one spring 23 is provided between the two corresponding beams 22. Of course, in other embodiments, two or more springs 23 may also be provided between the two corresponding beams 22, which will not be described in detail.

[0036] Specifically, in order to keep the skeleton 2 stable, it is necessary to limit the arrangement of the crossbeams 22 and the springs 23. Specifically, when the number of crossbeams 22 is an even number, the elastic coefficient and length of the springs 23 connected to the two crossbeams 22 located on the same straight line are equal, and the distance between the connection point between the spring 23 and the crossbeam 22 and the central column 21 is equal. In this way, using the principle of lever, the elastic coefficient and length of the springs 23 connected to the two crossbeams 22 located on the same straight line are equal, that is, under the condition of no external load, the tension applied by the spring 23 to the crossbeam 22 is equal, and the distance between the connection point between the spring 23 and the crossbeam 22 and the central column 21 is equal, and the tension applied by the spring 23 to the crossbeam 22 relative to the moment of the connection point between the two central columns 21 of the adjacent two layers of skeleton units 20 is equal, so that the force and moment balance can be achieved in the direction of the two crossbeams 22. Similarly, the springs 23 are arranged in the same way on the two crossbeams 22 in other straight line directions, and the force and moment balance can also be achieved. Finally, the forces and moments of two adjacent layers of skeleton units 20 can be kept balanced.

[0037] When the number of cross beams 22 is an odd number, the elastic coefficients and lengths of the springs 23 connected to all cross beams 22 are equal, and the distances between the connection points between the springs 23 and the cross beams 22 and the central column 21 are equal. That is, under the condition of no external load, the tensions applied by all springs 23 to the cross beams 22 are equal, and because the cross beams 22 are evenly distributed in an annular shape, the forces and moments of the two adjacent layers of the skeleton units 20 can be kept balanced.

[0038] like Figure 4-5 As shown, in this embodiment, four cross beams 22 are evenly distributed in a ring on the central column 21, and the four cross beams 22 are divided into two groups, and the two cross beams 22 belonging to the same group are located on the same straight line. In this way, in two adjacent layers of skeleton units 20, springs 23 are installed between the corresponding two cross beams 22, and the elastic coefficients and lengths of the springs 23 installed on the two cross beams 22 belonging to the same group are equal, and the distances between the connection points between the springs 23 and the cross beams 22 and the central column 21 are equal. In this way, under the condition of no external load, the forces and moments of the two cross beams 22 can be balanced. In this embodiment, the elastic coefficients and lengths of the springs 23 installed on the four cross beams 22 are equal, and the distances between the connection points between the springs 23 and the cross beams 22 and the central column 21 are equal.

[0039] like Figure 6 As shown, in this embodiment, in order to ensure the degree of freedom between the central columns 21 of two adjacent layers of skeleton units 20. In this embodiment, the two ends of the central column 21 are respectively provided with a spherical socket 25 and a spherical plug 26 that match each other. Specifically, the lower end of the central column 21 of the skeleton unit 20 located in the upper layer and the upper end of the central column 21 of the skeleton unit 20 located in the lower layer are plug-connected through the spherical socket 25 and the spherical plug 26. Through the spherical matching relationship between the spherical socket 25 and the spherical plug 26, the two adjacent central columns 21 can achieve relative rotation in any direction.

[0040] In this embodiment, the wall 1 is a plane wall composed of planes around the frame 2, and the wall 1 in this embodiment is composed of several flat plates. Of course, in some other embodiments, the wall 1 can also be a curved wall composed of curved surfaces around the frame 2. In other embodiments, the wall 1 can also be a mixed surface wall composed of planes and curved surfaces around the frame 2.

[0041] Example 2

[0042] like Figure 7-8As shown, this embodiment proposes an elastic experimental device for simulating high-order modal dynamic response, including a three-dimensional gas-elastic device 3 and a towering structure for simulating high-order modal dynamic response as described in Example 1, and the towering structure is installed on the three-dimensional gas-elastic device 3. The three-dimensional gas-elastic device 3 includes a core column 31, which can vibrate along the mutually perpendicular X-axis and Y-axis directions and torsionally vibrate around its axis along the T direction; the central column 21 of the skeleton unit 20 located at the bottom layer is fixedly connected to the core column 31. In this embodiment, a connecting plate 32 is provided at the upper end of the core column 31, and the central column 21 of the skeleton unit 20 located at the bottom layer is welded and fixed to the connecting plate 32.

[0043] Specifically, the three-dimensional gas-elastic device 3 can be implemented using existing technologies, such as a full three-axis gas-elastic experimental device with adjustable torsional stiffness disclosed in Chinese patent application publication number CN118225371A, which will not be described in detail.

[0044] Example 3

[0045] This embodiment proposes a vibration test bench for simulating high-order modal dynamic response, on which a towering structure for simulating high-order modal dynamic response as described in Embodiment 1 is installed. Specifically, the central column 21 of the skeleton unit 20 at the bottom layer is fixedly connected to the vibration test bench.

[0046] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A towering structure for simulating high-order modal dynamic response, characterized in that: It comprises a frame and a wall mounted on the frame; the frame comprises at least two layers of frame units; the frame unit comprises a central column and at least three cross beams evenly distributed in an annular manner mounted on the central column; The two central columns of the frame units of two adjacent layers can rotate relative to each other in any direction; a spring is provided between the corresponding two cross beams of the frame units of two adjacent layers, and both ends of the spring are connected to the corresponding two cross beams.

2. The towering structure for simulating high-order modal dynamic response according to claim 1, characterized in that: Both ends of the central column are respectively provided with mutually matching spherical sockets and spherical plugs; the lower end of the central column of the skeleton unit located on the upper layer and the upper end of the central column of the skeleton unit located on the lower layer are plug-connected through the spherical sockets and spherical plugs.

3. The towering structure for simulating high-order modal dynamic response according to claim 1, characterized in that: The number of the crossbeams is an even number, the elastic coefficients and lengths of the springs connected to two of the crossbeams located on the same straight line are equal, and the distances between the connection points between the springs and the crossbeams and the central column are equal; or, the number of the crossbeams is an odd number, the elastic coefficients and lengths of the springs connected to all of the crossbeams are equal, and the distances between the connection points between the springs and the crossbeams and the central column are equal.

4. The towering structure for simulating high-order modal dynamic response according to claim 1, characterized in that: The crossbeam is provided with a spring hook connected with the spring.

5. The towering structure for simulating high-order modal dynamic response according to claim 1, characterized in that: At least one spring is arranged between two corresponding beams of two adjacent layers of the frame units.

6. The towering structure for simulating high-order modal dynamic response according to claim 1, characterized in that: The wall is a plane wall composed of planes surrounding the frame; or, the wall is a curved wall composed of curved surfaces surrounding the frame; or, the wall is a mixed surface wall composed of planes and curved surfaces surrounding the frame.

7. An elastic experimental device for simulating high-order modal dynamic response, characterized in that: It comprises a three-dimensional gas-elastic device and a towering structure for simulating high-order modal dynamic response as claimed in any one of claims 1 to 6, wherein the towering structure is installed on the three-dimensional gas-elastic device.

8. The elastic experimental device for simulating high-order modal dynamic response according to claim 7, characterized in that: The three-dimensional gas elastic device includes a core column, which can vibrate along mutually perpendicular X-axis and Y-axis directions and torsionally vibrate around its axis along the T direction; the central column of the skeleton unit located at the lowest layer is fixedly connected to the core column.

9. A vibration test bench for simulating high-order modal dynamic response, characterized in that: The vibration test bench is equipped with a towering structure for simulating high-order modal dynamic response as described in any one of claims 1 to 6.

10. The vibration test bench for simulating high-order modal dynamic response according to claim 9, characterized in that: The central column of the skeleton unit located at the lowest layer is fixedly connected to the vibration test bench.

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