A method for installing a wind tunnel honeycomb module

Abstract

The application provides a method for mounting a wind tunnel honeycomb module, comprising: analyzing and calculating the disturbance degree of a frame used for mounting the wind tunnel honeycomb module under maximum load; calculating the wind resistance of the frame to determine the structural form of the frame; pre-processing the frame, then assembling and welding the honeycomb unit and the frame to form a single honeycomb module; mounting the honeycomb module in place according to the honeycomb mounting scheme, checking and adjusting the flatness, perpendicularity and pitch angle of each honeycomb module, adjusting the bevel angle formed by the two frames connected between adjacent honeycomb modules, and simultaneously and symmetrically spot welding the front end face and the rear end face of the honeycomb module to weld the honeycomb module on the wind tunnel body, and symmetrically spot welding the middle of the single honeycomb module to the body; the method can support the deformation of the honeycomb caused by its own weight, facilitate the connection between the modules, and effectively reduce the wind resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind tunnels, in particular to a method for installing a wind tunnel honeycomb module. BACKGROUND

[0002] A wind tunnel refers to a device for conducting various aerodynamic tests in a pipeline system designed according to certain requirements, using a power device to drive a controllable airflow, based on the principles of relativity and similarity of motion. In order to ensure the uniformity of the airflow in the test section of the tunnel and reduce the turbulence degree, a honeycomb is arranged in the stable section of the wind tunnel to divide large vortexes of the airflow, thereby reducing the turbulence degree of the airflow. Since the cross section of the tunnel is large, the honeycomb cannot be manufactured as a whole, so the entire cross section needs to be divided into multiple unit modules. The traditional installation method is to directly install each unit module on a pre-installed frame, which ensures the strength of the entire honeycomb under aerodynamic load, but the wind resistance caused by the frame becomes an important factor affecting the uniformity of the airflow, and the connection between the honeycomb unit and the installation frame is difficult. SUMMARY

[0003] The present application provides a method for installing a wind tunnel honeycomb module, aiming to solve the problem of large wind resistance caused by the installation frame of the existing honeycomb in the wind tunnel.

[0004] The technical solution of the present application is as follows:

[0005] A method for installing a wind tunnel honeycomb module, comprising the following steps:

[0006] S1, modeling and analyzing the frame for installing the wind tunnel honeycomb module under maximum load by using finite element software to ensure the strength of the frame of the honeycomb unit and determine the thickness of the frame;

[0007] S2, calculating the wind resistance rate of the frame to determine the structure of the frame, including the radius r of the front edge semicircular column of the frame, the bevel angle a, the wedge-shaped inclination angle of the rear edge of the frame, the tail end bevel angle a, the distribution interval h of the plug welding hole, the size of the plug welding hole and the taper of the plug welding hole;

[0008] S3, pre-processing the frame, and then welding the honeycomb unit and the frame to form a single honeycomb module;

[0009] S4, installing the honeycomb module in place according to the installation scheme of the honeycomb, checking the flatness, perpendicularity and pitch angle of each honeycomb module and adjusting them, and adjusting the bevel angle between the frames adjacent to each other;

[0010] S5, point solid welding is performed on the front end face and the rear end face of the honeycomb module simultaneously and symmetrically by argon arc welding, and point solid welding is performed symmetrically from the middle of the single honeycomb module to both sides; after all the point solid welding is completed, the honeycomb module is fixed on the wind tunnel body through a plurality of bolts, and the honeycomb module is welded and fixed on the wind tunnel body;

[0011] S6, after all the welding is completed, the welds at the front end face and the rear end face of the honeycomb module are polished and processed into semicircular shapes, and the plug welding points on all the frames are polished to be flush with the corresponding honeycomb modules.

[0012] As a technical solution of the present application, in step S3, the frame is pre-processed by shearing.

[0013] As a technical solution of the present application, in step S5, vertical welding is performed first, then horizontal welding is performed, and finally circumferential welding between the honeycomb module and the tunnel body is performed.

[0014] As a technical solution of the present application, in step S5, the front end face and the rear end face of the frame are first symmetrically back welding, and the back welding is completed in one time, and the remaining positions of the frame are filled with welding by segmental skip welding.

[0015] As a technical solution of the present application, in step S5, the rear edge of the frame is in a wedge-shaped structure, and the thickness of the wedge-shaped structure gradually thins from the direction close to the honeycomb module to the direction away from the honeycomb module.

[0016] As a technical solution of the present application, in step S5, a plurality of tapered plug welding holes are arranged on the rear edge of the frame.

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

[0018] This application provides a method for installing a honeycomb module in a wind tunnel. It replaces the original mounting frame with an external frame for the honeycomb unit, and optimizes the frame design to effectively reduce wind resistance while ensuring strength under aerodynamic loads. The frameless installation method utilizes the module frame to support the deformation of the honeycomb unit due to its own weight, facilitates connection between modules, and effectively reduces wind resistance. Simultaneously, the leading edge of the honeycomb module frame is designed as a semi-cylindrical shape, with a 90° bevel to meet welding connection and strength requirements. After welding, it is ground to a semi-circular surface to effectively reduce wind resistance. Furthermore, the rear end of the honeycomb module frame is designed with a wedge-shaped structure to avoid vortices, thus ensuring airflow uniformity. To meet the requirements of impact wind loads, the rear of the honeycomb module frame is designed for weldable connections. To compensate for insufficient strength caused by the wedge-shaped thinning, a certain number of plug weld holes are added to the frame; these plug weld holes are designed in a conical shape to facilitate welding. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the cell module distribution provided in an embodiment of this application;

[0021] Figure 2 for Figure 1 A schematic diagram showing the installation and connection between the AA-direction cellular module and the cavity;

[0022] Figure 3 for Figure 1 A schematic diagram showing the installation and connection between adjacent cell modules in the BB direction;

[0023] Figure 4 A schematic diagram of the plug weld holes in the X-axis direction of the rear edge of the frame of the cell module provided in the embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the plug weld hole in the Y-axis direction of the rear edge of the frame of the cell module provided in the embodiment of this application.

[0025] Icons: 1-Cellular module; 2-Cavity; 3-Border; 4-Plug hole. Detailed Implementation

[0026] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0028] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0029] In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0030] In addition, in the present application, unless otherwise explicitly specified and limited, the first feature above or below the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature above, above and above the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature below, below and below the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the present application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] Embodiments:

[0034] Please refer to Figure 1 , combined with reference Figures 2 to 5 , the present application provides a kind of honeycomb of wind tunnel module 1 installation method, it mainly includes the following steps:

[0035] S1, by finite element software modeling analysis calculation wind tunnel honeycomb module 1 installation is used frame under maximum load degree of freedom, to ensure the strength of the frame 3 of honeycomb unit, and determine the thickness of the frame 3;

[0036] S2, to the frame 3 is calculated to determine the structure of the frame 3, including the radius r of the frame 3 front edge semicircular column, bevel angle a, frame 3 rear edge wedge inclination angle, tail end bevel angle a, distribution spacing h of plug welding hole 4, plug welding hole 4 size and plug welding hole 4 taper;

[0037] S3, the frame 3 is preprocessed in a way of machining, then honeycomb unit and the frame 3 are formed into single honeycomb module 1 by group welding;

[0038] S4, according to honeycomb installation scheme, honeycomb module 1 is installed in place, the flatness, perpendicularity, pitch angle of each honeycomb module 1 are checked and adjusted, and the bevel angle between two adjacent frames 3 is adjusted;

[0039] S5, point solid welding is carried out simultaneously and symmetrically on the front end face and the rear end face of the honeycomb module 1 by argon arc welding, and point solid welding is carried out symmetrically from the middle of the single honeycomb module 1 to both sides; after all the point solid welding is completed, the honeycomb module 1 is fixed on the wind tunnel body 2 by a plurality of bolts, and the honeycomb module 1 is welded and fixed on the wind tunnel body 2;

[0040] S6, after all welding is completed, the welds at the front end face and the rear end face of the honeycomb module 1 are polished and processed into semicircular shape, and the plug welding points on all the frames 3 are polished to be flush with the corresponding honeycomb module 1.

[0041] It should be noted that in step S3, the frame 3 is preprocessed in a way of shearing.

[0042] It should be noted that in step S5, the welding of the frame 3 is first carried out by vertical welding and then by horizontal welding, and finally the circumferential welding between the honeycomb module 1 and the hole body 2 is carried out, which is beneficial to eliminate the welding stress. Moreover, in order to control the welding deformation, the front end face and the rear end face of the honeycomb module 1 are first subjected to symmetrical backing welding, and the backing welding is completed in one time. When the filling welding is carried out at the remaining positions of the frame 3, the segmented skip welding is adopted. At the same time, the rear edge of the frame 3 is in a wedge-shaped structure, and the thickness of the wedge-shaped structure gradually thins from the direction close to the honeycomb module 1 to the direction away from the honeycomb module 1. Due to the wedge-shaped thinning and the certain length of the rear edge of the frame 3, the middle part of the frame 3 is prevented from being bulged and the plug welding points are implemented simultaneously with the welding seam during the welding of the end part. In addition, a plurality of tapered plug welding holes 4 are arranged on the rear edge of the frame 3.

[0043] It should be noted that the wind tunnel honeycomb has the functions of guiding and dividing the airflow large vortex, which is beneficial to accelerate the vortex decay and improve the airflow velocity distribution. In order to facilitate the manufacturing and installation, the entire honeycomb is divided into a plurality of module groups due to the large cross section of the hole body 2. In order to ensure the strength of the honeycomb under the action of a certain aerodynamic load, the disturbance degree of the entire end face meets the design requirements, the outer frame 3 is used to replace the original mounting frame for the plurality of divided honeycomb units, which reduces the wind resistance to a certain extent and ensures the uniformity of the airflow. In order to further reduce the influence on the airflow and ensure the strength, the front edge of the windward side of the honeycomb unit frame 3 is designed as a semicircular cylinder, and the rear edge of the outflow side is designed as a wedge with a certain angle, so as to ensure that the wind resistance requirement meets the strength requirement under the action of aerodynamic load.

[0044] Moreover, the frame 3 is used to replace the mounting frame scheme. Firstly, the disturbance degree under the maximum load is calculated by using finite element modeling analysis, the strength of the honeycomb unit frame 3 is ensured, and the thickness thereof is determined. The wind resistance rate of the frame 3 is calculated to determine the structure form. The front edge of the windward side is designed as a semicircular cylinder after welding in order to reduce the wind resistance rate. In order to realize the connection and fixation, 90° bevels are respectively arranged on the two unit module frames 3. After installation and inspection, argon arc welding is carried out and the bevels are polished to semicircles. In order to avoid the formation of airflow vortex, the rear edge of the frame 3 is designed as a wedge with a certain inclination angle. In order to realize the connection and fixation of the two frames 3, 90° bevels are also arranged on the wedge-shaped tail end of the rear edge. After installation and inspection, argon arc welding is carried out and the bevels are polished to semicircles. Since the rear edge is wedge-shaped, the connection and fixation of the tail end cannot meet the requirement of shear force under the action of load. Therefore, a certain number and size of plug welding points are arranged on the rear edge. In order to facilitate the plug welding and ensure the quality, tapered plug welding holes 4 are arranged on one side between the two frames 3. According to the installation position and the operation method of argon arc welding, the plug welding holes 4 of the horizontal frame 3 are arranged on the upper side, and the plug welding holes 4 of the vertical frame 3 are arranged on the right side. After the welding is completed, all the welding points need to be polished to be flush with the base material.

[0045] In summary, the application provides a method for installing a wind tunnel honeycomb module 1, which uses a honeycomb unit outer frame 3 instead of the original installation frame, and optimizes the design of the frame 3 to effectively reduce wind resistance and ensure strength under aerodynamic load. The frameless installation method uses the module frame 3 to support the deformation of the honeycomb caused by its own weight, facilitates the connection between modules, and effectively reduces the wind resistance rate. At the same time, the front edge of the honeycomb module 1 frame 3 is designed as a semicircular cylinder, and a 90° bevel is opened to meet the requirements of welding connection and strength. After welding is completed, the semicircular arc surface is polished to effectively reduce the wind resistance rate. In addition, the rear end of the honeycomb module 1 frame 3 is designed as a wedge-shaped structure, which avoids generating vortex, thereby ensuring the uniformity of airflow, and at the same time, in order to meet the impact wind load requirements, the tail of the honeycomb module 1 frame 3 is designed as a form that can be welded and connected. In order to make up for the insufficient strength caused by the thinning of the wedge shape, a certain number of plug welding holes 4 are added to the frame 3, and the plug welding holes 4 are designed as a tapered shape for easy plug welding.

[0046] The above only describes the preferred embodiments of the application and is not intended to limit the application. Those skilled in the art can make various changes and modifications to the application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A method of installing a wind tunnel honeycomb module, characterized by, The method comprises the following steps: S1, by finite element software modeling analysis calculation wind tunnel honeycomb module installation frame under maximum load, to ensure the strength of the honeycomb unit frame, and determine the thickness of the frame; S2, the frame is calculated to determine the structure of the frame, including the frame of the front edge of the semi-cylindrical radius r, bevel angle a, the back edge of the frame wedge angle, the tail end of the bevel angle a, the distribution of the plug welding hole size and plug welding hole taper; S3, the frame is preprocessed, and then the honeycomb unit is welded with the frame to form a single honeycomb module; S4, according to the installation scheme of the honeycomb, the planeness, perpendicularity and pitch angle of each honeycomb module are checked and adjusted, and the bevel angle between the adjacent frames is adjusted; S5, the argon arc welding is used to simultaneously and symmetrically point solid welding on the front end face and the rear end face of the honeycomb module, and the point solid welding is symmetrically carried out from the middle of the single honeycomb module to both sides; after all the point solid welding is completed, the honeycomb module is fixed on the wind tunnel body through a plurality of bolts, and the honeycomb module is welded and fixed on the wind tunnel body; S6, after all the welding is completed, the welds at the front end face and the rear end face of the honeycomb module are polished and processed into semicircular shape, and all the plug welding points on the frame are polished to be flush with the corresponding honeycomb module.

2. The method of installing a wind tunnel honeycomb module according to claim 1, wherein, In step S3, the frame is preprocessed by shearing.

3. The method of claim 1, wherein, In step S5, the honeycomb module is welded first by vertical welding and then by horizontal welding, and finally the circumferential welding between the honeycomb module and the tunnel body is carried out.

4. The method of claim 1, wherein, In step S5, the front end face and the rear end face of the honeycomb module are symmetrically fillet welded first, and the fillet welding is completed at one time, and the remaining positions of the honeycomb module are filled by segmented skip welding.

5. The method of installing a wind tunnel honeycomb module according to claim 1, wherein, In step S5, the rear edge of the frame is wedge-shaped structure, and the thickness of the wedge-shaped structure gradually thins from the direction close to the honeycomb module to the direction away from the honeycomb module.

6. The method of installing a wind tunnel honeycomb module according to claim 1, wherein, In step S5, a plurality of tapered plug welding holes are arranged on the rear edge of the frame.

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