Shear energy consumption plate, optimization method thereof and shear type mild steel damper

Abstract

The invention relates to a shear energy consumption plate optimization design method and a damper, and provides a shear energy consumption plate, an optimization method of the shear energy consumption plate and a shear type mild steel damper. The method comprises the following steps: S1, determining a design objective function model and a constraint model of the shear energy consumption plate; s2, establishing an original shear energy consumption plate model, and defining geometric dimensions and material attributes of the model; s3, discretizing the original shear energy consumption plate model obtained in the step S2, and applying boundary conditions and loads according to requirements to obtain a processed shear energy consumption plate model; s4, optimizing the processed shear energy consumption plate model obtained in the step S3 by adopting a solid isotropic material penalty model, and continuously adjusting the processed shear energy consumption plate model through an iterative updating model so as to obtain an optimal shear energy consumption plate model; the shear energy consumption plate comprises a plate body, and the plate body is provided with the shear groove obtained based on the method. The shearing type mild steel damper comprises the shearing energy consumption plate.

Description

Technical Field

[0001] The invention relates to an optimization design method for a shear energy dissipation plate and a damper, and in particular to a shear energy dissipation plate and an optimization method thereof, and a shear type mild steel damper. Background Art

[0002] Current shear-type mild steel dampers face many challenges in terms of energy dissipation performance and structural optimization. Traditional design methods mainly rely on the experience of designers and a large number of experiments, which has obvious limitations. First, the traditional design process lacks systematic and scientific optimization methods. Designers often adjust design parameters through experience and trial and error, which leads to low design efficiency and difficulty in ensuring the optimality of design results, and it is easy to miss potential better solutions. Secondly, due to the lack of scientific optimization methods, it is difficult for traditional design methods to maximize the use of materials while ensuring performance, resulting in low material utilization, increased weight and cost of the structure, which is particularly unfavorable for large-scale engineering projects. In addition, due to the lack of systematic optimization tools, it is difficult for designers to find the optimal solution, which may make the structural performance less than ideal, especially when dealing with strong earthquakes or other dynamic loads, the energy dissipation capacity of shear-type mild steel dampers may be insufficient. Finally, the traditional design method relies on a large number of experiments and repeated adjustments, which is not only time-consuming and labor-intensive, but also requires a lot of manpower, material and financial resources for sample production and testing, resulting in a long design cycle and high R&D costs, which cannot meet the needs of modern engineering for fast and efficient design. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problems of long design cycle and high R&D cost of the existing design method, and to provide a shear energy dissipation plate and an optimization method thereof, and a shear type mild steel damper.

[0004] To solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0005] An optimization method for a shear energy dissipation plate comprises the following steps:

[0006] S1. Determine the design objective function model and constraint model of the shear energy dissipation plate;

[0007] S2. Establishing an original shear energy dissipation plate model, and defining the geometric dimensions and material properties of the original shear energy dissipation plate model;

[0008] S3, discretizing the original shear energy dissipation plate model obtained in step S2, and applying boundary conditions and loads according to requirements to obtain a processed shear energy dissipation plate model;

[0009] S4. The processed shear energy dissipation plate model obtained in step S3 is optimized by using a solid isotropic material penalty model, and the processed shear energy dissipation plate model is continuously adjusted by iteratively updating the model to obtain an optimal shear energy dissipation plate model.

[0010] Further, in step S1, the design objective function model is a maximum energy dissipation capacity model, wherein the maximum energy dissipation capacity model is:

[0011]

[0012] Where: MaximizeD(ρ) is the maximum energy dissipation capacity, C(ρ) is the energy dissipation capacity, ρ is the material density distribution, and the value range of ρ is between 0 and 1; Ω is the design space, σ(ò) is the stress-strain relationship, is the strain rate, dΩ is the integral of the design space;

[0013] The constraint model includes a volume constraint model and a stress constraint model;

[0014] Among them, the volume constraint model is: Where V max is the maximum volume of the material;

[0015] The stress constraint model is: In the formula, σ max is the maximum allowable stress of the material.

[0016] Furthermore, in step S2, the material properties of the original shear energy dissipation plate model are the elastic-plastic model and mechanical performance parameters of the shear energy dissipation plate.

[0017] Furthermore, in step S3, the original shear energy dissipation plate model obtained in step S2 is discretized in the following manner:

[0018] The original shear energy dissipation plate model obtained in step S2 is divided into finite element meshes to ensure that the mesh is fine enough to accurately simulate the stress distribution and deformation.

[0019] Further, step S4 is specifically as follows:

[0020] The solid isotropic material penalty model is used to construct the discretized objective function model and constraint function model;

[0021] Optimizing the processed shear energy dissipation plate model obtained in step S3 through a discretized objective function model and a constraint function model;

[0022] The processed shear energy dissipation plate model is continuously adjusted by iteratively updating the model to obtain the optimal shear energy dissipation plate model.

[0023] Furthermore, in step S4, the discretized objective function model is:

[0024]

[0025] In the formula, ρ e is the relative density factor, The transpose of the node displacement vector of element e, K e Stiffness matrix of element e, u e Element e node displacement vector;

[0026] The discretized constraint function model includes a discretized volume constraint model and a discretized stress constraint model, wherein the discretized volume constraint model is:

[0027]

[0028] Where V e It is an element envelope;

[0029] The discretized stress constraint model is:

[0030] σ e (ò)≤σ max ;

[0031] The iterative update model is:

[0032]

[0033] In the formula, C(ρ (k) ) is the energy dissipation capacity of the kth iteration, k is the number of iterations, and α is the coefficient.

[0034] A shear energy dissipation plate comprises a plate body, on which a shear groove obtained by the above-mentioned optimization method of the shear energy dissipation plate is opened.

[0035] A shear type mild steel damper comprises an upper connecting plate, a polytetrafluoroethylene friction plate, a steel pipe column and a lower connecting plate which are sequentially arranged from top to bottom;

[0036] The lower surface of the upper connecting plate is connected to the upper surface of the polytetrafluoroethylene friction plate;

[0037] The upper surface of the steel pipe column is fitted with the lower surface of the polytetrafluoroethylene friction plate, and the lower surface of the steel pipe column is connected to the upper surface of the lower connecting plate;

[0038] A plurality of shear energy dissipation plates evenly distributed around the circumference are provided between the upper connecting plate and the lower connecting plate, and the shear energy dissipation plates are the shear energy dissipation plates mentioned above.

[0039] Furthermore, the number of the shear energy dissipation plates is four;

[0040] The upper surface of the shear energy dissipation plate is connected to the lower surface of the upper connecting plate, and the lower surface of the shear energy dissipation plate is connected to the upper surface of the lower connecting plate.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] 1. The optimization method of the shear energy dissipation plate provided by the present invention discretizes the original shear energy dissipation plate model and applies boundary conditions and loads according to requirements to obtain the processed shear energy dissipation plate model; a solid isotropic material penalty model is used to optimize the obtained processed shear energy dissipation plate model, and the processed shear energy dissipation plate model is continuously adjusted by iteratively updating the model to obtain the optimal shear energy dissipation plate model; through optimization and iterative optimization, the material distribution in the design space is gradually adjusted to ensure high performance and high reliability of the optimization result; compared with traditional optimization methods, the topology optimization algorithm has higher computational efficiency, shortens the design cycle, and reduces R&D costs.

[0043] 2. The shear energy dissipation plate and its optimization method, as well as the shear-type mild steel damper provided by the present invention, transmit vibrations through the upper connecting plate when subjected to vibration impacts. Since the friction coefficient of polytetrafluoroethylene is very low, the upper connecting plate and the steel pipe column produce relative displacement, and the shear energy dissipation plate produces deformation, consuming the energy of absorbing vibration impacts, thereby achieving the purpose of shock reduction. The damping characteristics of the shear energy dissipation plate can be fully utilized to reduce the vibration absorption energy and better protect the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 The overall structure of the embodiment of the present invention is shown in FIG. Figure 1 ;

[0045] Figure 2 The overall structure of the embodiment of the present invention is shown in FIG. Figure 2 ;

[0046] Figure 3 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0047] Explanation of the accompanying drawings: 1-upper connecting plate, 2-polytetrafluoroethylene friction plate, 3-steel pipe column, 4-shear energy dissipation plate, 5-lower connecting plate. DETAILED DESCRIPTION

[0048] The technical solutions in the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] An optimization method for a shear energy dissipation plate comprises the following steps:

[0050] S1. Determine the design objective function model and constraint model of the shear energy dissipation plate;

[0051] The design objective function model is a model for maximizing energy dissipation capacity, where the model for maximizing energy dissipation capacity is:

[0052]

[0053] Where: MaximizeD(ρ) is the maximum energy dissipation capacity, C(ρ) is the energy dissipation capacity, ρ is the material density distribution, and the value range of ρ is between 0 and 1; Ω is the design space, σ(ò) is the stress-strain relationship, is the strain rate, dΩ is the integral of the design space;

[0054] The constraint model includes volume constraint model and stress constraint model;

[0055] Among them, the volume constraint model is: ∫ Ω ρdΩ≤V max ; Where V max is the maximum volume of the material;

[0056] The stress constraint model is: σ(ò)≤σ max ; In the formula, σ max is the maximum allowable stress of the material.

[0057] S2. Establishing an original shear energy dissipation plate model, and defining the geometric dimensions and material properties of the original shear energy dissipation plate model; wherein the material properties are the elastic-plastic model and mechanical property parameters of the shear energy dissipation plate;

[0058] S3, discretizing the original shear energy dissipation plate model obtained in step S2, wherein the discretization method is: dividing the original shear energy dissipation plate model into finite element grids, ensuring that the grids are fine enough to accurately simulate stress distribution and deformation; applying boundary conditions and loads according to requirements to obtain a processed shear energy dissipation plate model;

[0059] S4. Using the solid isotropic material penalty model to construct a discretized objective function model and constraint function model;

[0060] Among them, the discretized objective function model is:

[0061]

[0062] In the formula, ρ e is the relative density factor, The transpose of the node displacement vector of element e, K e Stiffness matrix of element e, u e Element e node displacement vector;

[0063] The discretized constraint function model includes a discretized volume constraint model and a discretized stress constraint model, wherein the discretized volume constraint model is:

[0064]

[0065] Where V e It is an element envelope;

[0066] The discretized stress constraint model is:

[0067] σ e (ò)≤σ max ;

[0068] Optimizing the processed shear energy dissipation plate model obtained in step S3 through a discretized objective function model and a constraint function model;

[0069] The processed shear energy dissipation plate model is continuously adjusted by iteratively updating the model to obtain the optimal shear energy dissipation plate model;

[0070] Among them, the iterative update model is:

[0071]

[0072] In the formula, C(ρ (k) ) is the energy dissipation capacity of the kth iteration, k is the number of iterations, and α is the coefficient.

[0073] Through the above steps, the present invention realizes the system optimization design of the shear type mild steel damper, improves the energy dissipation capacity and material utilization rate, and provides a scientific and effective solution for the shock absorption design of engineering structures.

[0074] The present invention further provides a shear energy dissipation plate, comprising a plate body, on which a shear groove obtained based on the above-mentioned optimization method for the shear energy dissipation plate is formed.

[0075] The present invention also provides a shear-type mild steel damper, comprising an upper connecting plate 1, a polytetrafluoroethylene friction plate 2, a steel pipe column 3 and a lower connecting plate 5 which are sequentially distributed from top to bottom; the lower surface of the upper connecting plate 1 is connected to the upper surface of the polytetrafluoroethylene friction plate 2; the upper surface of the steel pipe column 3 is fitted with the lower surface of the polytetrafluoroethylene friction plate 2, and the lower surface of the steel pipe column 3 is connected to the upper surface of the lower connecting plate 5; four circumferentially evenly distributed shear energy dissipation plates 4 are provided between the upper connecting plate 1 and the lower connecting plate 5, and the shear energy dissipation plates 4 are the aforementioned shear energy dissipation plates 4; the upper surface of the shear energy dissipation plates 4 is connected to the lower surface of the upper connecting plate 1, and the lower surface of the shear energy dissipation plates 4 is connected to the upper surface of the lower connecting plate 5.

[0076] When the shear-type mild steel damper is in use and is subjected to vibration impact, the vibration is transmitted through the upper connecting plate 1. Since the friction coefficient of polytetrafluoroethylene is very low, the upper connecting plate 1 and the steel pipe column 3 produce relative displacement, and the shear energy dissipation plate 4 produces deformation, consuming the energy of absorbing the vibration impact and achieving the purpose of shock reduction. The shear-type mild steel damper provided in this embodiment is mainly used in buildings with seismic isolation requirements. It can make full use of the damping characteristics of the shear energy dissipation plate 4, reduce the vibration absorption energy, and better protect the building.

[0077] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope recorded in the claims.

Claims

1. A method for optimizing a shear energy dissipation plate, characterized in that: The steps include: S1. Determine the design objective function model and constraint model of the shear energy dissipation plate; S2. Establishing an original shear energy dissipation plate model, and defining the geometric dimensions and material properties of the original shear energy dissipation plate model; S3, discretizing the original shear energy dissipation plate model obtained in step S2, and applying boundary conditions and loads according to requirements to obtain a processed shear energy dissipation plate model; S4. The processed shear energy dissipation plate model obtained in step S3 is optimized by using a solid isotropic material penalty model, and the processed shear energy dissipation plate model is continuously adjusted by iteratively updating the model to obtain an optimal shear energy dissipation plate model.

2. The optimization method of the shear energy dissipation plate according to claim 1, characterized in that: In step S1, the design objective function model is a model for maximizing energy dissipation capacity, wherein the model for maximizing energy dissipation capacity is: C(ρ)∫ Ω σ(ò)dΩ; Where: Maximize: C(ρ) is the maximum energy dissipation capacity, C(ρ) is the energy dissipation capacity, ρ is the material density distribution, and the value range of ρ is between 0 and 1; Ω is the design space, σ(ò) is the stress-strain relationship, ò is the strain rate, and dΩ is the integral of the design space; The constraint model includes a volume constraint model and a stress constraint model; Among them, the volume constraint model is: ∫ Ω ρdΩ≤V max ; Where V max is the maximum volume of the material; The stress constraint model is: σ(ò)≤σ max ; In the formula, σ max is the maximum allowable stress of the material.

3. The optimization method of the shear energy dissipation plate according to claim 1, characterized in that: In the step S2, the material properties of the original shear energy dissipation plate model are the elastic-plastic model and mechanical performance parameters of the shear energy dissipation plate.

4. The optimization method of the shear energy dissipation plate according to claim 1, characterized in that: In step S3, the original shear energy dissipation plate model obtained in step S2 is discretized as follows: The original shear energy dissipation plate model obtained in step S2 is divided into finite element meshes to ensure that the mesh is fine enough to accurately simulate the stress distribution and deformation.

5. The optimization method of the shear energy dissipation plate according to claim 1, characterized in that: Step S4 is specifically as follows: The solid isotropic material penalty model is used to construct the discretized objective function model and constraint function model; Optimizing the processed shear energy dissipation plate model obtained in step S3 through a discretized objective function model and a constraint function model; The processed shear energy dissipation plate model is continuously adjusted by iteratively updating the model to obtain the optimal shear energy dissipation plate model.

6. The optimization method of the shear energy dissipation plate according to claim 5, characterized in that: In step S4, the discretized objective function model is: In the formula, ρ e is the relative density factor, The transpose of the node displacement vector of element e, K e Stiffness matrix of element e, u e Element e node displacement vector; The discretized constraint function model includes a discretized volume constraint model and a discretized stress constraint model, wherein the discretized volume constraint model is: Where V e It is an element envelope; The discretized stress constraint model is: σ e (ò)≤σ max ; The iterative update model is: In the formula, C(ρ (k) ) is the energy dissipation capacity of the kth iteration, k is the number of iterations, and α is the coefficient.

7. A shear energy dissipation plate, characterized in that: It comprises a plate body, on which a shear groove obtained by the optimization method of the shear energy dissipation plate according to any one of claims 1 to 6 is opened.

8. A shear type mild steel damper, characterized in that: It comprises an upper connecting plate (1), a polytetrafluoroethylene friction plate (2), a steel pipe column (3) and a lower connecting plate (5) which are arranged in sequence from top to bottom; The lower surface of the upper connecting plate (1) is connected to the upper surface of the polytetrafluoroethylene friction plate (2); The upper surface of the steel pipe column (3) is in contact with the lower surface of the polytetrafluoroethylene friction plate (2), and the lower surface of the steel pipe column (3) is connected to the upper surface of the lower connecting plate (5); A plurality of shear energy dissipation plates (4) evenly distributed around the circumference are provided between the upper connecting plate (1) and the lower connecting plate (5), and the shear energy dissipation plates (4) are the shear energy dissipation plates (4) described in claim 7.

9. The shear type mild steel damper according to claim 8, characterized in that: The number of the shear energy dissipation plates (4) is four; The upper surface of the shear energy dissipation plate (4) is connected to the lower surface of the upper connecting plate (1), and the lower surface of the shear energy dissipation plate (4) is connected to the upper surface of the lower connecting plate (5).

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