A method for dynamic conceptual design of a large wind tunnel laboratory building structure foundation

Abstract

The application discloses a large-scale wind tunnel laboratory building structure foundation dynamic conceptual design method, comprising the following steps: S1, according to the conventional building structure design requirement, a preliminary cavity structure scheme is designed, the bottom elevation of each section of the foundation under the central axis is checked, and the cavity and the main process design part are designed separately; S2, the main process is designed, and a fan section plant foundation scheme meeting the condition is formed; S3, the cavity is designed, including: based on S1, a preliminary scheme of the whole cavity building structure is formed; S4, based on the fan section plant foundation scheme of step S2 and the preliminary scheme of the whole cavity building structure of step S3, a whole finite element model of the whole cavity structure containing the cavity and the fan section plant foundation after independent optimization is constructed; and S5, the difference of the gravity action support reaction force of the whole cavity structure is compared and analyzed, the layout is adjusted to meet the inclination requirement, and a final scheme is formed.

Description

Technical Field

[0001] This invention relates to the field of architectural design technology, and in particular to a dynamic conceptual design method for the foundation structure of a large wind tunnel laboratory building. Background Technology

[0002] Wind tunnel laboratories are large-scale experimental facilities used to study aerodynamics, and the demand for and requirements of large wind tunnel laboratories are constantly increasing. Therefore, the design of large wind tunnel laboratories is becoming increasingly complex, and they typically present the following problems:

[0003] The foundation of the large wind tunnel laboratory adopts an overall vibration isolation design. However, due to the high rigidity of the foundation, the vibration generated by the fan section foundation is easily transmitted through the foundation, resulting in poor vibration isolation performance.

[0004] The use of conventional vibration isolation methods for calculating the foundation of large wind tunnel laboratories leads to a complex calculation process and reduced calculation accuracy.

[0005] 3) The construction design of the foundation of the large wind tunnel laboratory adopts the ordinary vibration isolation method. Due to the use of the overall foundation design method, the construction materials are large, the investment is increased, and resources are wasted.

[0006] Therefore, new technologies and methods are needed to at least partially address the shortcomings of existing technologies. Summary of the Invention

[0007] To address this, this invention establishes a separate design technology for the cavity and main process components in the basic design of large wind tunnel laboratories. This involves designing the vibration-free cavity and main process components separately, achieving the goal of using different design methods to address different design objectives for the fan section and other cavities, resulting in an economical and efficient approach. Simultaneously, through continuous optimization of dynamic and static design processes during the design process, high efficiency and accuracy in the calculation process are achieved.

[0008] According to one aspect of the present invention, a method for dynamic conceptual design of the foundation structure of a large wind tunnel laboratory is provided, comprising:

[0009] S1. Based on the conventional building structure design requirements, conduct preliminary cavity structure design, check the bottom elevation of each section of the foundation under the central axis, and design the cavity and main process design separately.

[0010] S2. Conduct main process design, including:

[0011] 1) Based on the bearing capacity requirements, a preliminary foundation design scheme is formulated;

[0012] 2) Based on the mass ratio of the foundation to the superstructure, the dimensions of the power foundation are initially determined; modal analysis is performed on the power foundation to calculate the frequency of the power foundation and the axial fan, and the foundation dimensions are adjusted until the mismatch frequency is greater than 30%.

[0013] 3) Perform time history analysis on the dynamic foundation. If the foundation vibration values ​​meet the allowable vibration index, proceed to the next step 4); if they do not meet the allowable vibration index, return to step 2); and

[0014] 4) Perform static optimization design on the dynamic foundation until the foundation deformation is less than the allowable deformation of the foundation, thus forming a foundation scheme for the fan section plant that meets the requirements.

[0015] S3. Design the cavity, including: forming a preliminary architectural structure plan for the entire cavity based on S1;

[0016] S4. Based on the fan section factory foundation scheme of step S2 and the preliminary scheme of the overall cavity building structure of step S3, construct an overall finite element model of the overall cavity structure, including the cavity and the independently optimized fan section factory foundation; and

[0017] S5. Conduct a comparative analysis of the differences in the support reaction forces under gravity on the entire cavity structure, and adjust the layout to meet the tilt requirements to form the final solution.

[0018] According to an embodiment of the present invention, conventional building structural design requirements include safety, size, function, height, and type selection.

[0019] According to an embodiment of the present invention, step 1) includes load-bearing capacity design based on the geological survey report, the mass of the fan power equipment, and its length, width and height dimensions.

[0020] According to an embodiment of the present invention, in step 2), the mass ratio of the foundation to the superstructure is greater than 20.

[0021] According to an embodiment of the present invention, in step 4), the allowable deformation is less than 5 mm.

[0022] According to an embodiment of the present invention, step S5 further includes using vibration isolation trench design to form the final solution.

[0023] This invention proposes a dynamic and static design scheme for the fan section foundation that is continuously optimized. The core process involves first selecting the foundation based on its load-bearing capacity, then performing modal analysis on the dynamic foundation based on the mass ratio of the foundation to the superstructure, followed by time-history analysis to ensure the foundation vibration values ​​meet allowable vibration indices, thus completing the dynamic foundation design. After settlement verification, static optimization design is performed until the foundation deformation is less than the allowable deformation, resulting in a vibration control scheme for the fan section factory foundation that meets standard requirements. This scheme simplifies calculations and improves calculation accuracy and efficiency by prioritizing dynamic design over static design and through continuous optimization.

[0024] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0025] Figure 1 This is a flowchart illustrating the dynamic conceptual design method for the foundation structure of a large wind tunnel laboratory according to the invention's implementation scheme. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the embodiments or descriptions are not intended to limit the scope of protection of the present invention. It should be understood that the finite element modeling, modal analysis and optimization design involved in the present invention are themselves known, therefore the present invention focuses on describing the combination of each step.

[0027] Figure 1 This is a flowchart illustrating the dynamic conceptual design method for the foundation structure of a large wind tunnel laboratory according to the embodiments of the invention. As shown in the figure, the dynamic conceptual design method for the foundation structure of a large wind tunnel laboratory according to the embodiments may include:

[0028] First, a preliminary cavity structure design is conducted based on conventional building structural design requirements. These requirements may include safety, dimensions, function, height, and material selection. Then, the elevations of the foundation bottoms of each section below the central axis are checked, and based on this, the cavity and main process design components are designed separately.

[0029] The main process design includes the foundation design for the fan power equipment. Based on the parameters of the fan power equipment, such as mass, length, width, and height, and the geological survey report, the load-bearing capacity is determined. A preliminary foundation design scheme is then developed based on the load-bearing capacity requirements. This preliminary foundation design scheme must meet the load-bearing capacity requirements; if it does not, a revised preliminary foundation design scheme is developed until it does.

[0030] Then, based on the mass ratio of the foundation to the superstructure (fan power unit), the dimensions of the power foundation are initially determined. This mass ratio can be greater than 20. Finite element modeling is then performed, including the main structure, loads, boundary conditions, etc. Modal analysis is then conducted on the power foundation using the finite element model to calculate the frequencies of the power foundation and the axial fan, determining if the frequency mismatch meets the condition of being greater than 30%. If not, the model parameters are adjusted, for example, by adjusting the foundation dimensions, until the frequency mismatch is greater than 30%.

[0031] Next, a time history analysis is performed on the dynamic foundation. If the foundation vibration values ​​meet the allowable vibration index, the process proceeds to the next step; otherwise, the process returns to adjust the finite element model until the allowable vibration index is met.

[0032] The static optimization design of the power foundation is carried out until the foundation deformation is less than the allowable deformation, for example, the allowable deformation is less than 5mm, thus forming a foundation scheme for the fan section plant that meets the requirements.

[0033] Another approach to designing the cavity and main process components separately involves designing the cavity itself, including developing a preliminary plan for the overall cavity architectural structure.

[0034] Then, based on the foundation scheme of the fan section factory building and the preliminary scheme of the overall cavity building structure, a finite element model of the overall cavity structure, including the cavity and the independently optimized foundation of the fan section factory building, was constructed. A comparative analysis of the differences in the support reactions under gravity was conducted on the overall cavity structure. By adjusting the layout to meet the tilt requirements and utilizing vibration isolation trench design, the final scheme was formed.

[0035] Compared with existing technologies, the present invention can achieve beneficial technical effects:

[0036] 1) Simplicity of the design scheme. Based on the structural analysis of the wind tunnel laboratory, the structure is divided into a cavity structure and a main process section, which simplifies the design scheme and improves technical feasibility.

[0037] 2) Efficiency of the calculation process. For the fan section foundation, based on the preliminary design scheme, dynamic design is carried out first, including mass ratio design, modal analysis and time history analysis, and resonance response analysis, and then static optimization design is carried out, which simplifies the calculation process and improves the calculation efficiency.

[0038] 3) Economic efficiency in design and construction. By designing the cavity and main process components separately, and adopting different design methods for different design objectives of the cavity and main process components, the construction materials were saved and economic efficiency was improved while achieving the design objectives.

[0039] The present invention has been described above through specific embodiments, but the present invention is not limited to these specific embodiments. Those skilled in the art should understand that various modifications, equivalent substitutions, and changes can be made to the present invention, and such changes, as long as they do not depart from the spirit of the present invention, should be within the protection scope of the present invention. Furthermore, the phrase "one embodiment" mentioned above refers to different embodiments, and of course, all or part of them can be combined in one embodiment.

Claims

1. A method for conceptual design of a large wind tunnel laboratory building foundation dynamics, characterized by, include: S1. Based on the conventional building structure design requirements, conduct preliminary cavity structure design, check the bottom elevation of each section of the foundation under the central axis, and design the cavity and main process design separately. S2. Conduct main process design, including: 1) Based on the bearing capacity requirements, a preliminary foundation design scheme is formulated; 2) Based on the mass ratio of the foundation to the superstructure, the dimensions of the power foundation are initially determined; modal analysis is performed on the power foundation to calculate the frequency of the power foundation and the axial fan, and the foundation dimensions are adjusted until the mismatch frequency is greater than 30%. 3) Perform time history analysis on the dynamic foundation. If the foundation vibration values ​​meet the allowable vibration index, proceed to the next step 4); if they do not meet the allowable vibration index, return to step 2); and 4) Perform static optimization design on the dynamic foundation until the foundation deformation is less than the allowable deformation of the foundation, thus forming a foundation scheme for the fan section plant that meets the requirements. S3. Design the cavity, including: forming a preliminary architectural structure plan for the entire cavity based on S1; S4. Based on the fan section factory foundation scheme of step S2 and the preliminary scheme of the overall cavity building structure of step S3, construct an overall finite element model of the overall cavity structure, including the cavity and the independently optimized fan section factory foundation; and S5. Conduct a comparative analysis of the differences in the support reaction forces under gravity on the entire cavity structure, and adjust the layout to meet the tilt requirements to form the final solution.

2. The dynamic conceptual design method for the foundation structure of a large wind tunnel laboratory according to claim 1, characterized in that, Step 1) includes load-bearing capacity design based on the geological survey report, the mass of the fan power equipment, and its length, width, and height dimensions.

3. The dynamic conceptual design method for the foundation structure of a large wind tunnel laboratory according to claim 1, characterized in that, In step 2), the mass ratio of the foundation to the superstructure is greater than 20.

4. The dynamic conceptual design method for the foundation structure of a large wind tunnel laboratory according to claim 1, characterized in that, In step 4), the allowable deformation is less than 5 mm.

5. The dynamic conceptual design method for the foundation structure of a large wind tunnel laboratory according to claim 1, characterized in that, Step S5 also includes using vibration isolation trench design to form the final solution.

6. The dynamic conceptual design method for the foundation structure of a large wind tunnel laboratory according to claim 1, characterized in that, In step S1, the conventional building structure design requirements include safety, size, function, height, and type selection.

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