Steady-State Flow Field Environment Tension Cable Aerodynamic Drag Simulation Loading Device and Loading Method

Abstract

The present invention relates to the technical field of testing of cable-driven parallel robots, and particularly relates to a pneumatic resistance simulation loading device and a loading method for a tension cable in a steady-state flow field environment; the loading device includes: a first cable moving end point and a second cable moving end point, a flexible cable is provided between the first cable moving end point and the second cable moving end point, a plurality of loading pipes are arranged at intervals on the flexible cable, and an adaptive elastic member is provided between two adjacent loading pipes; a pulling mechanism is arranged on the loading pipe, the pulling mechanism includes at least two levels of pulling components, and they are stacked, each level of pulling component includes multiple groups of pulling members, and the number of groups of the previous-level pulling members is twice that of the next-level pulling members; a loading cable, one end of which is connected to the pulling mechanism, and the loading cable passes through a sliding mechanism. The deformation of the flexible cable automatically adjusts the distance between the loading pipes, so that the pneumatic load acts uniformly on the entire cable body. Even when the shape of the flexible cable changes, the force can still be kept uniform, improving the accuracy of the simulation results.

Description

Technical Field

[0001] The present invention relates to the technical field of rope-driven parallel robot testing, and particularly to a device and method for simulating and loading the aerodynamic drag of a tensioned cable in a steady flow field environment. Background Art

[0002] With the rapid development of modern aerospace and unmanned aerial vehicle technologies, air recovery and docking technologies have gradually become the focus of research. Air recovery methods are mainly applied to scenarios such as reusable rocket recovery, unmanned aerial vehicle recovery, and air recovery of reentry capsules. These systems generally adopt flexible structures, such as flexible cables, flexible connection belts, etc., to achieve flexible and precise control during the recovery and docking processes. These flexible structures are affected by complex aerodynamic loads during flight, especially in high-altitude and high-speed environments, where the aerodynamic loads exhibit significant non-linear characteristics, making it extremely challenging to simulate the aerodynamic loads in ground tests.

[0003] In aerial operations, flexible cable structures are widely used due to their unique advantages. Firstly, cable structures have a small windward area, low weight, and are easy to recover and release, making them particularly suitable for performing complex operations in the air environment. In addition, flexible cable structures have good axial bearing capacity and can meet the tensile force requirements in high-dynamic environments. Therefore, in order to verify the reliability and performance of flexible cable structures during the R & D and testing stages, ground simulation tests are usually required. However, due to the complex stress conditions of flexible cable structures during actual flight, the requirements for simulating and loading aerodynamic loads on the ground are extremely high, and it is necessary to accurately load aerodynamic loads that conform to the real environment under ground conditions to ensure the effectiveness and reliability of the tests.

[0004] Currently, the simulation of aerodynamic loads is often carried out in wind tunnels. Although wind tunnel tests can better simulate the aerodynamic load environment of aircraft, such tests are costly, and the test space in wind tunnels is limited, making it not suitable for systematic testing of large-scale flexible cable structures. Especially for full-scale simulation of flexible structures, the test results are easily interfered with, affecting the accuracy of the tests. In summary, the application of existing methods for simulating the aerodynamic loads of flexible cable structures in a laboratory environment is still blank, and no publicly available technology can accurately load the aerodynamic drag of flexible cables in the laboratory. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the simulation test results of aerodynamic loads in the prior art are easily interfered with, affecting the accuracy of the tests, and thus provide a device and method for simulating and loading the aerodynamic drag of a tensioned cable in a steady flow field environment.

[0006] To solve the above technical problems, the present invention provides a tension cable pneumatic resistance simulation loading device in a steady-state flow field environment, including: a first cable moving end point and a second cable moving end point, a flexible cable is provided between the first cable moving end point and the second cable moving end point, a plurality of loading tubes are provided at intervals on the flexible cable, and an adaptive elastic member is provided between two adjacent loading tubes; a pulling mechanism is provided on the loading tube, the pulling mechanism includes at least two levels of pulling components, and they are stacked, each level of the pulling component includes multiple groups of pulling members, and the number of groups of the pulling members in the previous level is twice the number of groups of the pulling members in the next level; a loading cable, one end of which is connected to the pulling mechanism, the loading cable passes through a sliding mechanism, and a load elastic member is provided on the loading cable, and the other end of the loading cable is connected to a loading motor.

[0007] Further, the pulling member includes a cable and a strut, the cable is used to connect the loading tube, and the strut is used to connect two adjacent cables.

[0008] Further, the cable, the strut, and the loading cable are all in the plane formed by the first cable moving end point and the second cable moving end point in the wind direction.

[0009] Further, the pulling mechanism has four levels of pulling components.

[0010] Further, the sliding mechanism includes a slideway, a pulley, and an adjustment motor, the pulley is provided on the slideway, and the loading cable is laid on the pulley, and the pulley is connected to the adjustment motor.

[0011] Further, the loading motor and the adjustment motor are provided on both sides of the loading cable.

[0012] Further, the adaptive elastic member is an adaptive spring.

[0013] Further, the load elastic member is a load spring.

[0014] The present invention also provides a loading method using the tension cable pneumatic resistance simulation loading device in the steady-state flow field environment, including:

[0015] Fix the wind direction, and vary the length and position of the flexible cable

[0016] Adjust the distance between the first cable moving end point and the second cable moving end point, change the length of the flexible cable, and fix the flexible cable at the required position; control the tension of the loading cable through the loading motor, and gradually transfer the simulated pneumatic load to the flexible cable; the adaptive elastic element automatically adjusts the distribution of multiple loading tubes during the loading process, so that the loading force is evenly distributed in the length direction of the flexible cable, and no matter how the length of the flexible cable changes, it can maintain uniform stress; adjust the motor to drive the pulley to slide on the slideway to ensure that the loading cable can still adjust the direction at different lengths, and ensure the smooth transfer of the loading force.

[0017] Furthermore, it includes:

[0018] The fixed point of the flexible cable remains unchanged, and the wind direction changes

[0019] Fix the length and position of the flexible cable without changing the position of its fixed point; adjust the direction of the air source so that the air flow blows towards the flexible cable from different directions to simulate different wind directions; when the wind direction changes, the pulley slides on the slideway, and the position of the pulley is controlled by the adjustment motor to ensure that the force direction of the loading cable is consistent with the pneumatic load direction; adjust the distribution of the loading tubes through the adaptive elastic element, so that during the process of the wind direction change, the flexible cable is uniformly stressed at different parts.

[0020] The technical solution of the present invention has the following advantages:

[0021] 1. The simulated loading device for the aerodynamic drag of a tensioned cable in a steady-state flow field environment provided by the present invention includes: a first cable moving end point and a second cable moving end point, a flexible cable is provided between the first cable moving end point and the second cable moving end point, multiple loading tubes are arranged at intervals on the flexible cable, and an adaptive elastic element is provided between two adjacent loading tubes; a pulling mechanism is provided on the loading tube, the pulling mechanism includes at least two levels of pulling components, each level of pulling component includes multiple groups of pulling pieces, and the number of groups of the previous level of pulling pieces is twice the number of groups of the next level of pulling pieces; a loading cable, one end of which is connected to the pulling mechanism, the loading cable passes through the sliding mechanism, and a load elastic element is arranged on the loading cable, and the other end of the loading cable is connected to the loading motor.

[0022] By providing a flexible cable at the first cable moving end point and the second cable moving end point, and arranging multiple loading tubes at intervals on the flexible cable, and each loading tube is connected to the pulling piece, wherein the number of pulling pieces is determined according to the number of levels of the pulling component, that is, the number of groups of the previous level of pulling pieces is twice the number of groups of the next level of pulling pieces. Then, the loading cable is connected to the pulling mechanism. After the loading cable changes the direction through the sliding mechanism, it passes through the load elastic element and is finally connected to the loading motor. The loading motor is controlled to wind the loading cable, and by controlling the length of the load elastic element, the application of the load force is realized.

[0023] The pneumatic drag simulation loading device for a tensioned cable in a steady-state flow field environment has efficient pneumatic load simulation: Compared with existing wind tunnel tests, the present invention realizes the equivalent simulation of the pneumatic load on the flexible cable through the transmission system of the loading motor and the multi-stage pulling components. This method does not require expensive wind tunnel equipment and can be completed under laboratory conditions, greatly reducing the experimental cost and significantly improving the test efficiency, and is applicable to the experimental requirements of simulating the pneumatic loads of various flexible cables.

[0024] It has a structurally designed with strong adaptability: The present invention adopts an adaptive elastic member, enabling the loading tube to be evenly distributed in the length direction of the flexible cable during the loading process. This adaptive design can automatically adjust the spacing of the loading tubes according to the deformation of the flexible cable, ensuring that the pneumatic load acts uniformly on the entire cable body. Even when the shape of the flexible cable changes, the force application remains uniform, improving the accuracy of the simulation results.

[0025] Accurate mechanical loading control: The loading motor can precisely control the tension of the loading cable, and through the length adjustment of the load elastic member, it realizes the simulation loading of pneumatic resistances of different magnitudes. Compared with the difficulty in achieving stable control of pneumatic load forces in wind tunnel tests, the present invention can achieve refined control of the loading force through the precise adjustment of the loading motor and the load elastic member, improving the accuracy and reliability of the loading force.

[0026] Good structural stability: Through the stacked connection of the multi-stage pulling components, the force transmission path of the entire loading device is clear, and each level of pulling component remains stable under different loading conditions. Especially when the spatial configuration of the flexible cable changes, the entire device can adaptively transmit the loading force, ensuring the stability of the loading device and the reliability of the test results.

[0027] 2. The pneumatic drag simulation loading device for a tensioned cable in a steady-state flow field environment provided by the present invention, wherein the sliding mechanism includes a slideway, a pulley, and an adjustment motor. The pulley is arranged on the slideway, and the loading cable is laid on the pulley, and the pulley is connected to the adjustment motor.

[0028] The pulley can slide on the slideway, and the adjustment motor controls the position of the pulley in the slideway, enabling the loading cable to apply tension at different positions and angles, adapting to the different configuration requirements of the flexible cable, and thus better simulating the pneumatic load characteristics in the real environment.

[0029] The description of the invention content is provided to introduce the selection of concepts in a simplified form, which will be further described in the specific implementation manners below. The description of the invention content is not intended to identify the important features or essential features of the present disclosure, nor is it intended to limit the scope of the present disclosure. Brief Description of the Drawings

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of Scenario 1 of the tension cable aerodynamic resistance simulation loading device provided by the present invention under a steady-state flow field environment;

[0032] Figure 2 For Figure 1 the structural schematic diagram at position A in

[0033] Figure 3 It is a schematic structural diagram of Scenario 2 of the tension cable aerodynamic resistance simulation loading device provided by the present invention under a steady-state flow field environment;

[0034] Figure 4 For Figure 3 the structural schematic diagram at position B in

[0035] Explanation of reference numerals:

[0036] 1. First cable moving end point; 2. Second cable moving end point; 3. Loading pipe; 4. First-level wire rope; 5. First-level support rod; 6. Second-level wire rope; 7. Second-level support rod; 8. Third-level wire rope; 9. Third-level support rod; 10. Fourth-level wire rope; 11. Fourth-level support rod; 12. Loading wire rope; 13. Adjusting motor; 14. Pulley; 15. Slideway; 16. Load elastic member; 17. Loading motor; 18. Flexible cable; 19. Adaptive elastic member. Specific embodiments

[0037] In the following, only some exemplary embodiments are briefly described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present disclosure. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0038] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present disclosure. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present disclosure, "plural" means two or more unless otherwise specifically defined.

[0039] In the description of the present disclosure, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection, an electrical connection or a connection capable of mutual communication; it may be directly connected or indirectly connected through an intermediate medium, and it may be the connection inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0040] In the present disclosure, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0041] The following disclosure provides many different embodiments or examples for implementing different structures of the present disclosure. To simplify the disclosure of the present disclosure, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present disclosure. In addition, the present disclosure may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between various embodiments and / or settings discussed. In addition, the present disclosure provides examples of various specific processes and materials, but those of ordinary skill in the art may recognize the application of other processes and / or the use of other materials.

[0042] The preferred embodiments of the present disclosure are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present disclosure and are not used to limit the present disclosure.

[0043] Please refer to Figures 1 to 4 As shown, the present invention provides a pneumatic drag simulation loading device for a tensioned cable in a steady-state flow field environment, including: a first cable moving end point 1 and a second cable moving end point 2, a flexible cable 18 is provided between the first cable moving end point 1 and the second cable moving end point 2, a plurality of loading tubes 3 are provided at intervals on the flexible cable 18, and an adaptive elastic member 19 is provided between two adjacent loading tubes 3; a pulling mechanism is provided on the loading tube 3, the pulling mechanism includes at least two levels of pulling components and is arranged in a stacked manner, each level of the pulling component includes multiple groups of pulling members, and the number of groups of the pulling members in the previous level is twice the number of groups of the pulling members in the next level; a loading cable 12, one end of which is connected to the pulling mechanism, the loading cable 12 passes through a sliding mechanism, and a load elastic member 16 is provided on the loading cable 12, and the other end of the loading cable 12 is connected to a loading motor 17.

[0044] By providing a flexible cable 18 at the first cable moving end point 1 and the second cable moving end point 2, and arranging a plurality of loading tubes 3 at intervals on the flexible cable 18, and each loading tube 3 is connected to a pulling member. Among them, the number of pulling members is determined according to the number of levels of the pulling components, that is, the number of groups of the pulling members in the previous level is twice the number of groups of the pulling members in the next level. Then, the loading cable 12 is connected to the pulling mechanism. After the direction of the loading cable 12 is changed by the sliding mechanism, it passes through the load elastic member 16 and is finally connected to the loading motor 17. By controlling the winding of the loading cable 12 by the loading motor 17 and controlling the length of the load elastic member 16, the application of the load force can be achieved; if it is desired to improve the loading uniformity and accuracy, more levels of pulling components can be set.

[0045] The tension cable aerodynamic drag simulation loading device in the steady-state flow field environment has efficient aerodynamic load simulation: Compared with the existing wind tunnel tests, the present invention realizes the equivalent simulation of the aerodynamic load on the flexible cable 18 through the drive system of the loading motor 17 and the pulling member. This method does not require expensive wind tunnel equipment and can be completed under laboratory conditions, greatly reducing the experimental cost and significantly improving the test efficiency, and is applicable to the experimental requirements of simulating the aerodynamic loads of various flexible cables 18.

[0046] It has a structurally designed with strong adaptability: The present invention adopts an adaptive elastic member 19, enabling the loading tube 3 to be evenly distributed along the length direction of the flexible cable 18 during the loading process. This adaptive design can automatically adjust the spacing of the loading tubes 3 according to the deformation of the flexible cable 18, ensuring that the aerodynamic load acts evenly on the entire cable body. Even when the shape of the flexible cable 18 changes, the force application remains uniform, improving the accuracy of the simulation results.

[0047] Accurate mechanical loading control: The loading motor 17 can precisely control the tension of the loading cable 12 and, through the length adjustment of the load elastic member 16, achieve the simulation loading of aerodynamic drags of different magnitudes. Compared with the difficulty in achieving stable control of aerodynamic load forces in wind tunnel tests, the present invention can achieve refined control of the loading force through the precise adjustment of the loading motor 17 and the load elastic member 16, improving the accuracy and reliability of the loading force.

[0048] Good structural stability: Through the laminated connection of multiple-level pulling members, the force transmission path of the entire loading device is clear, and each level of pulling component remains stable under different loading conditions. Especially when the spatial configuration of the flexible cable 18 changes, the entire device can adaptively transmit the loading force, ensuring the stability of the loading device and the reliability of the test results.

[0049] The main performance indicators of the present invention include:

[0050] Loading accuracy: The loading motor 17 can precisely control the magnitude of the loading force, and the loading accuracy is within 5%, meeting the high-precision simulation requirements of complex aerodynamic loads.

[0051] Uniform distribution effect: The adaptive elastic member 19 enables the distribution uniformity of the loading tube 3 on the flexible cable 18 to reach more than 90%, effectively ensuring the uniformity of force application.

[0052] Cost savings: Compared with wind tunnel tests, the experimental cost is reduced by at least 50%. The equipment is easy to install and maintain and is suitable for multiple repeated experiments.

[0053] Therefore, compared with traditional wind tunnel tests, the present invention has the advantages of low cost, high precision, and high adaptability, and can accurately simulate the aerodynamic load of the flexible cable 18 in a laboratory environment, providing an effective aerodynamic load simulation method for the design and optimization of the flexible cable 18 under aerodynamic loads.

[0054] In some alternative embodiments, the pulling member includes a wire rope and a strut. The wire rope is used to connect the loading tube 3, and the strut is used to connect two adjacent wire ropes.

[0055] In this embodiment, the pulling mechanism has a four-stage pulling component, and a detailed description is given with the four-stage pulling component. That is, it includes a first-stage pulling component, a second-stage pulling component, a third-stage pulling component, and a fourth-stage pulling component.

[0056] Among them, the first-stage pulling component includes eight first-stage pulling members, and each first-stage pulling member includes a first-stage wire rope 4 and a first-stage strut 5; the second-stage pulling component includes four second-stage pulling members, and each second-stage pulling member includes a second-stage wire rope 6 and a second-stage strut 7; the third-stage pulling component includes two third-stage pulling members, and each third-stage pulling member includes a third-stage wire rope 8 and a third-stage strut 9; the fourth-stage pulling component includes one fourth-stage pulling member, and each fourth-stage pulling member includes a fourth-stage wire rope 10 and a fourth-stage strut 11.

[0057] The first-stage wire rope 4 and the first-stage strut 5 are fixed between the first cable moving end point 1 and the second cable moving end point 2 through the loading tube 3. One end of the first-stage wire rope 4 is connected to the end of the first-stage strut 5 and fixed through the loading tube 3 to keep it stable under the action of tension;

[0058] The second-stage wire rope 6 and the second-stage strut 7, and the third-stage wire rope 8 and the third-stage strut 9 are stacked and connected in sequence. Each combination of wire rope 4 and strut is connected through a fixed point, so that the wire ropes at all levels remain stable under different force conditions;

[0059] The connection between the fourth-stage wire rope 10 and the fourth-stage strut 11 also passes through a fixed point, so that the aerodynamic resistance transmitted by the wire rope can be transmitted to the flexible cable 18 level by level.

[0060] Specifically, the wire rope, the strut, and the loading wire rope 12 are all in the plane formed by the first cable moving end point 1 and the second cable moving end point 2 in the wind direction.

[0061] In some alternative embodiments, the sliding mechanism includes a slideway 15, a pulley 14, and an adjustment motor 13. The pulley 14 is arranged on the slideway 15, and the loading wire rope 12 is laid on the pulley 14, and the pulley 14 is connected to the adjustment motor 13.

[0062] The pulley 14 can slide on the slideway 15. The adjustment motor 13 controls the position of the pulley 14 in the slideway 15, so that the loading cable 12 can apply tensile force at different positions and angles, adapting to the different configuration requirements of the flexible cable 18, and thus better simulating the aerodynamic load characteristics in the real environment.

[0063] Among them, the adjustment motor 13 is connected to the pulley 14 through a pull rope, so as to drive the pulley 14 to move in the slideway 15.

[0064] In this embodiment, the loading motor 17 and the adjustment motor 13 are arranged on both sides of the loading cable 12, which is convenient for the loading motor 17 to apply load to the four-stage cable 10, and the adjustment motor 13 adjusts the position of the pulley 14.

[0065] Among them, the adaptive elastic member 19 is an adaptive spring; the load elastic member 16 is a load spring.

[0066] The present invention also provides a loading method using a loading device for simulating the aerodynamic drag of a tensioned cable in a steady flow field environment, including:

[0067] Scenario 1: Fix the wind direction, and vary the length and position of the flexible cable 18

[0068] In this scenario, the wind direction remains fixed, while the length and position of the flexible cable 18 change. This scenario simulates the influence of the change in the length of the flexible cable 18 on the aerodynamic load distribution under fixed flow field conditions.

[0069] Implementation method:

[0070] Equipment configuration:

[0071] The air source generates an air flow in a fixed direction and acts on the flexible cable 18;

[0072] The flexible cable 18 is connected between the first cable moving end point 1 and the second cable moving end point 2, and the positions and spacings of these two end points can be adjusted to change the length of the flexible cable 18.

[0073] Multiple loading pipes 3 and adaptive elastic members 19 are evenly distributed in the length direction of the flexible cable 18 to ensure that the aerodynamic load can be evenly applied when the length changes.

[0074] Specific implementation steps:

[0075] Adjust the distance between the first cable moving end point 1 and the second cable moving end point 2, change the length of the flexible cable 18, and fix the flexible cable 18 at the required position; control the tension of the loading cable 12 through the loading motor 17, and gradually transfer the simulated pneumatic load to the flexible cable 18; the adaptive elastic member 19 automatically adjusts the distribution of the multiple loading pipes 3 during the loading process, so that the loading force is evenly distributed in the length direction of the flexible cable 18. No matter how the length of the flexible cable 18 changes, it can maintain uniform stress; the adjustment motor 13 drives the pulley 14 to slide on the slideway 15, ensuring that the loading cable 12 can still adjust the direction at different lengths, and ensuring the smooth transfer of the loading force.

[0076] Implementation effect:

[0077] In this scheme, under a fixed wind direction, the uniform loading of the pneumatic load on flexible cables 18 of different lengths is successfully achieved. When the length of the flexible cable 18 changes, the adaptive elastic member 19 can automatically adjust the spacing of the loading pipes 3.

[0078] Scenario 2: The fixed points of the flexible cable 18 remain unchanged and the wind direction changes

[0079] In this scenario, the fixed point positions of the flexible cable 18 remain unchanged while the wind direction changes. This scenario is used to simulate the force conditions of the pneumatic load on the flexible cable 18 under different wind directions.

[0080] Implementation method:

[0081] Equipment configuration:

[0082] Fix the two ends of the flexible cable 18 on the first cable moving end point 1 and the second cable moving end point 2 respectively, and keep them unchanged.

[0083] The air source can change the air flow direction to simulate the pneumatic environment under different wind directions.

[0084] The loading motor 17 controls the loading cable 12 to apply a pneumatic load, and through the cooperation of the pulley 14 and the slideway 15, the loading direction can be adjusted.

[0085] Implementation steps:

[0086] Fix the length and position of the flexible cable 18 without changing its fixed point position; adjust the direction of the air source so that the air flow blows towards the flexible cable 18 from different directions to simulate different wind directions; when the wind direction changes, the pulley 14 slides on the slideway 15, and the position of the pulley 14 is controlled by the adjustment motor 13 to ensure that the stress direction of the loading cable 12 is consistent with the pneumatic load direction; adjust the distribution of the loading pipes 3 through the adaptive elastic member 19 so that during the process of the wind direction change, the flexible cable 18 is evenly stressed at different parts.

[0087] Implementation effect:

[0088] This solution can accurately simulate the aerodynamic load distribution of the flexible cable 18 under different wind directions. By adjusting the position of the pulley 14 in the slideway 15, the automatic adjustment of the loading direction is achieved, making the loading force always consistent with the aerodynamic direction, and improving the accuracy and stability of the loading.

[0089] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A loading method for simulating the aerodynamic drag of a tensioning cable in a steady-state flow field environment, characterized in that: A tensioning cable aerodynamic drag simulation loading device under a steady-state flow field environment is used. The tensioning cable aerodynamic drag simulation loading device under a steady-state flow field environment includes: A first cable movable end point (1) and a second cable movable end point (2), a flexible cable (18) is provided between the first cable movable end point (1) and the second cable movable end point (2), a plurality of loading tubes (3) are provided on the flexible cable (18) at intervals, and an adaptive elastic member (19) is provided between two adjacent loading tubes (3); A pulling mechanism is provided on the loading tube (3), the pulling mechanism comprising at least two stages of pulling components, which are stacked, each stage of the pulling components comprising a plurality of groups of pulling members, the number of groups of the pulling members in the previous stage being twice the number of groups of the pulling members in the next stage; A loading cable (12) has one end connected to the pulling mechanism, the loading cable (12) passes through the sliding mechanism, a load elastic member (16) is provided on the loading cable (12), and the other end of the loading cable (12) is connected to the loading motor (17); The pulling member comprises a pull wire and a support rod, the pull wire is used to connect the loading tube (3), and the support rod is used to connect two adjacent pull wires; The guy wires, support rods, and loading guy wires (12) are all in a plane formed by the wind direction, the first cable moving end point (1), and the second cable moving end point (2); The sliding mechanism comprises a slideway (15), a pulley (14), and an adjusting motor (13); the pulley (14) is arranged on the slideway (15), and the loading cable (12) is laid on the pulley (14); the pulley (14) is connected to the adjusting motor (13); The loading motor (17) and the regulating motor (13) are arranged on both sides of the loading cable (12); Fixed wind direction, variable length and position of flexible rope (18), The distance between the first cable moving end point (1) and the second cable moving end point (2) is adjusted to change the length of the flexible cable (18), and the flexible cable (18) is fixed at a desired position; the tension of the loading cable (12) is controlled by the loading motor (17), and the simulated pneumatic load is transmitted step by step to the flexible cable (18); the adaptive elastic member (19) automatically adjusts the distribution of the multiple loading tubes (3) during the loading process, so that the loading force is evenly distributed in the length direction of the flexible cable (18), and the uniform force can be maintained regardless of how the length of the flexible cable (18) changes; the regulating motor (13) drives the pulley (14) to slide on the slideway (15), ensuring that the loading cable (12) can still adjust its direction at different lengths, thereby ensuring smooth transmission of the loading force.

2. A loading method for simulating the aerodynamic drag of a tensioning cable under a steady-state flow field environment, characterized in that: A tensioning cable aerodynamic drag simulation loading device under a steady-state flow field environment is used. The tensioning cable aerodynamic drag simulation loading device under a steady-state flow field environment includes: A first cable movable end point (1) and a second cable movable end point (2), a flexible cable (18) is provided between the first cable movable end point (1) and the second cable movable end point (2), a plurality of loading tubes (3) are provided on the flexible cable (18) at intervals, and an adaptive elastic member (19) is provided between two adjacent loading tubes (3); A pulling mechanism is provided on the loading tube (3), the pulling mechanism comprising at least two stages of pulling components, which are stacked, each stage of the pulling components comprising a plurality of groups of pulling members, the number of groups of the pulling members in the previous stage being twice the number of groups of the pulling members in the next stage; A loading cable (12) has one end connected to the pulling mechanism, the loading cable (12) passes through the sliding mechanism, a load elastic member (16) is provided on the loading cable (12), and the other end of the loading cable (12) is connected to the loading motor (17); The pulling member comprises a pull wire and a support rod, the pull wire is used to connect the loading tube (3), and the support rod is used to connect two adjacent pull wires; The guy wires, support rods, and loading guy wires (12) are all in a plane formed by the wind direction, the first cable moving end point (1), and the second cable moving end point (2); The sliding mechanism comprises a slideway (15), a pulley (14), and an adjusting motor (13); the pulley (14) is arranged on the slideway (15), and the loading cable (12) is laid on the pulley (14); the pulley (14) is connected to the adjusting motor (13); The loading motor (17) and the regulating motor (13) are arranged on both sides of the loading cable (12); The fixed point of the flexible cable (18) remains unchanged, but the wind direction changes. The length and position of the flexible rope (18) are fixed without changing the position of its fixed point; the direction of the wind source is adjusted so that the airflow blows toward the flexible rope (18) from different directions to simulate different wind directions; when the wind direction changes, the pulley (14) slides on the slideway (15), and the position of the pulley (14) is controlled by the regulating motor (13) to ensure that the force direction of the loading cable (12) is consistent with the direction of the aerodynamic load; the distribution of the loading tube (3) is adjusted by the adaptive elastic member (19) so that the flexible rope (18) is uniformly stressed at different positions during the change of wind direction.

3. The loading method of the tension cable aerodynamic resistance simulation loading device under a steady-state flow field environment according to claim 1 or 2, characterized in that: The pulling mechanism has a four-stage pulling assembly.

4. The loading method of the tension cable aerodynamic resistance simulation loading device under a steady-state flow field environment according to claim 1 or 2, characterized in that: The adaptive elastic member (19) is an adaptive spring.

5. The loading method of the tension cable aerodynamic resistance simulation loading device under a steady-state flow field environment according to claim 1 or 2, characterized in that: The load elastic member (16) is a load spring.

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