Static three-component coefficient determination method and device, electronic equipment and storage medium

Abstract

The invention provides a static three-component coefficient determination method and device, electronic equipment and a storage medium, and relates to the technical field of cable-stayed bridges, and the method comprises the steps: collecting target images of a target rigid segment model at a plurality of wind speeds after the target rigid segment model is steady; for each wind speed, according to the circle center position of a first target circle and the circle center position of a second target circle in the target image, the relative displacement of the target rigid segment model under the wind speed and the target rigid segment model under the target wind speed is determined; and obtaining a static three-component coefficient of the target rigid segment model according to the relative displacement and the conversion relation between the displacement and the force. According to the scheme provided by the invention, a high-precision force measuring balance is prevented from being used for determining the static three-component coefficient, so that the experiment cost is reduced, the installation difficulty of the experiment is reduced, and the experiment efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of long-span bridges, and in particular to a method, device, electronic equipment and storage medium for determining a static three-division force coefficient. Background Art

[0002] With the development of economy and the advancement of technology, the span of bridges has been greatly increased. However, due to its low frequency and low damping characteristics, long-span bridges are prone to large vibrations under the excitation of wind loads, thus affecting the safety of bridge structures. The static three-force coefficient refers to the damping coefficient, lift coefficient and moment coefficient of the bridge. In the study of the wind resistance of long-span bridges, the static three-force coefficient is a key parameter in the buffeting response analysis and static wind load stability study. Their accurate measurement directly affects the accuracy of the bridge wind resistance study.

[0003] At present, a rigid segment model with a certain scale ratio is usually made first, and then the static three-dimensional force coefficient is determined by conducting a wind tunnel test on the rigid segment model.

[0004] However, in wind tunnel tests, a high-precision force balance is required during the measurement process. High-precision force balances have the disadvantages of being difficult to install, expensive, and easy to damage, as well as having low experimental efficiency. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a method, device, electronic device and storage medium for determining the static three-dimensional force coefficient, so as to solve the problem that a high-precision force balance is required in the measurement process in the wind tunnel test in the prior art. The high-precision force balance has the disadvantages of being difficult to install, high in instrument cost, easy to damage, and low in experimental efficiency.

[0006] In order to solve the above technical problems, the technical solution proposed by the present invention is: In a first aspect, the present application provides a method for determining a static three-force coefficient, the method comprising: After the target rigid segment model is in steady state, target images of the target rigid segment model under multiple wind speeds are collected; wherein the target of the target rigid segment model includes a first target circle, a second target circle and a cross mark, the cross mark is located at the center of the target, the distance between the center of the first target circle and the center of the target is equal to the distance between the center of the second target circle and the center of the target, and the radius of the first target circle is greater than the radius of the second target circle; For each wind speed, determining the relative displacement between the target rigid segment model at the wind speed and the target rigid segment model at the target wind speed according to the center position of the first target circle and the center position of the second target circle in the target image; The static three-force coefficient of the target rigid segment model is obtained according to the relative displacement and the conversion relationship between displacement and force.

[0007] In a second aspect, the present application provides a device for determining a static three-force coefficient, the device comprising: An acquisition module is used to acquire target images of the target rigid segment model at multiple wind speeds after the target rigid segment model is in a steady state; wherein the target of the target rigid segment model includes a first target circle, a second target circle and a cross mark, the cross mark is located at the center of the target, the distance between the center of the first target circle and the center of the target is equal to the distance between the center of the second target circle and the center of the target, and the radius of the first target circle is greater than the radius of the second target circle; a displacement determination module, for determining, for each wind speed, a relative displacement between the target rigid segment model and the target rigid segment model at a target wind speed according to the center position of the first target circle and the center position of the second target circle in the target image; The coefficient determination module is used to obtain the static three-division force coefficient of the target rigid segment model according to the relative displacement and the conversion relationship between displacement and force.

[0008] In a third aspect, the present application provides an electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein when the processor executes the program, the method for determining the static three-division force coefficient as described in any embodiment of the present application is implemented.

[0009] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for determining the static three-division force coefficient as described in any embodiment of the present application.

[0010] In a fifth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the method for determining the static three-division force coefficient as described in any embodiment of the present application.

[0011] Compared with the prior art, the advantages of the present invention are: after the target rigid segment model is in steady state, target images of the target rigid segment model under multiple wind speeds are collected; wherein, the target of the target rigid segment model includes a first target circle, a second target circle and a cross mark, the cross mark is located at the center of the target, the distance between the center of the first target circle and the center of the target is equal to the distance between the center of the second target circle and the center of the target, and the radius of the first target circle is greater than the radius of the second target circle; for each wind speed, the relative displacement of the target rigid segment model and the target rigid segment model under the target wind speed is determined according to the center position of the first target circle and the center position of the second target circle in the target image; the static three-division force coefficient of the target rigid segment model is obtained according to the relative displacement and the conversion relationship between displacement and force. That is, the solution of the present application determines the relative displacement of the target rigid segment model based on the image, and determines the static three-division force coefficient of the target rigid segment model based on the relative displacement information, thereby avoiding the use of a high-precision force balance to determine the static three-division force coefficient, thereby reducing the experimental cost and the difficulty of experimental installation. There is no need to repeatedly use a high-precision force balance to obtain the static three-division force coefficient in repeated wind tunnel tests, thereby improving the experimental efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein: Figure 1 It is a flow chart of the method for determining the static three-force coefficient provided by the present application; Figure 2 is another flow chart of the method for determining the static three-force coefficient provided by the present application; Figure 3 This is an example diagram of a target rigid segment model of the method for determining the static three-force coefficient provided in this application; Figure 4 It is a structural schematic diagram of a static three-force coefficient determination device provided by the present application; Figure 5 is a structural schematic diagram of an electronic device provided by the present application; Reference numerals: 1-spring; 2-model body; 3-target. DETAILED DESCRIPTION

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereby.

[0014] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore should not be understood as a limitation on the present invention.

[0015] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0016] In the present invention, unless otherwise clearly specified and limited, the terms "assemble", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 The present invention provides a flow chart of a method for determining a static three-force coefficient, which can be performed by a static three-force coefficient determination device, which can be implemented in software and / or hardware. In a specific embodiment, the device can be applied to an electronic device, which can be a computer. The following embodiments will be described by taking the application of the device in an electronic device as an example, referring to Figure 1 , the method may specifically include the following steps: Step 101 : after the target rigid segment model reaches a steady state, target images of the target rigid segment model under multiple wind speeds are collected.

[0019] Among them, the target of the target rigid segment model includes a first target circle, a second target circle and a cross mark, the cross mark is located at the center of the target, the distance between the center of the first target circle and the center of the target is equal to the distance between the center of the second target circle and the center of the target, and the radius of the first target circle is greater than the radius of the second target circle.

[0020] Specifically, the target rigid segment model is a model that can simulate the stress conditions of a long-span bridge. A target is attached to a section of the target rigid segment model, which is used to determine the displacement of the target rigid segment model during vibration. The target is composed of a large circle and a small circle. The target is attached to the side of the model, and the center of the cross section of the model is aligned with the cross mark in the target. The acquisition equipment for collecting target images of the target rigid segment model at multiple wind speeds, such as an industrial camera, is set up outside the wind tunnel test chamber, facing the target position through transparent glass to facilitate the capture of target images. After the target rigid segment model enters a steady state under the influence of any wind speed, the industrial camera collects multiple target images at multiple wind speeds according to a preset camera sampling frequency. Statistical parameter calculations are performed on the data of multiple target images, such as calculating the average value, and the statistical parameter results are used as data in subsequent steps to improve the accuracy of the acquisition results.

[0021] Optionally, the target rigid segment model also includes a spring suspension system and a model body. The target is attached to the model body, and the center of the surface where the width and height of the model body are located coincides with the center of the target. The spring suspension system includes a plurality of springs, wherein the lower ends of some springs are connected to the upper end of the model body, and the upper ends of some springs are connected to the lower end of the model body, so that the model body is suspended.

[0022] Specifically, Figure 3 is an example diagram of a target rigid segment model of the method for determining the static three-force coefficient provided in this application. Figure 3 As shown, the spring suspension system includes 8 springs 1, of which the lower ends of 4 springs 1 are connected to the upper ends of the model body 2, and the upper ends of the other 4 springs 1 are connected to the lower ends of the model body 2, so that the model body 2 is suspended. The model body 2 of the rigid segment model is obtained by reducing the long-span bridge according to the preset scale ratio. The target 3 is attached to the model body 2, and the center of the surface where the width and height of the model body 2 are located coincides with the center of the target 3.

[0023] Step 102 , for each wind speed, determine the relative displacement between the target rigid segment model at the wind speed and the target rigid segment model at the target wind speed according to the center position of the first target circle and the center position of the second target circle in the target image.

[0024] The target wind speed can be set according to actual experimental requirements. For example, the target wind speed is 0.

[0025] Specifically, for each wind speed, the relative displacement of the target rigid segment model at the wind speed relative to the target rigid segment model at the target wind speed is determined based on the movement of the center position of the first target circle and the center position of the second target circle relative to the target wind speed in the experiment, for example, relative to the movement at wind speed 0.

[0026] Optionally, before determining the relative displacement between the target rigid segment model at the target wind speed and the target rigid segment model at the target wind speed according to the center position of the first target circle and the center position of the second target circle in the target image, steps 21 to 22 may be performed.

[0027] Step 21, determining the diameter of the first target circle and the diameter of the second target circle according to the target image.

[0028] Specifically, an edge detection algorithm is used to process images collected at different wind speeds, and the diameter of the first target circle and the diameter of the second target circle are obtained through edge detection results of the first target circle and the second target circle.

[0029] Step 22, determining the center position of the first target circle and the center position of the second target circle according to the diameter of the first target circle and the diameter of the second target circle.

[0030] Specifically, an edge detection algorithm is used to process images collected at different wind speeds, and the center position of the first target circle and the center position of the second target circle are obtained through edge detection results of the first target circle and the second target circle.

[0031] Optionally, after executing steps 21 to 22, determining the relative displacement of the target rigid segment model under the wind speed and the target rigid segment model under the target wind speed based on the center position of the first target circle and the center position of the second target circle in the target image can be achieved through steps 1021 to 1022.

[0032] Step 1021, based on the diameter of the first target circle, the diameter of the second target circle, the center position of the first target circle, and the center position of the second target circle, determine the pixel coordinates of the diameter of the first target circle, the pixel coordinates of the diameter of the second target circle, the pixel coordinates of the center of the first target circle, and the pixel coordinates of the center of the second target circle.

[0033] Step 1022, based on the pixel coordinates of the diameter of the first target circle, the pixel coordinates of the diameter of the second target circle, the pixel coordinates of the center of the first target circle, and the pixel coordinates of the center of the second target circle, determine the relative displacement of the target rigid segment model at the wind speed and the target rigid segment model at the target wind speed.

[0034] Specifically, the pixel coordinates are converted into physical coordinates through a preset proportional relationship between pixels and physical lengths, and the relative displacement time history of the model at each wind speed relative to the target wind speed is obtained.

[0035] Optionally, step 1022 may be implemented through steps 221 to 222 .

[0036] Step 221, based on the pixel coordinates of the diameter of the first target circle, the pixel coordinates of the diameter of the second target circle, the pixel coordinates of the center of the first target circle, the pixel coordinates of the center of the second target circle, and the unit length corresponding to the preset pixels, obtain the physical coordinates of the diameter of the first target circle, the physical coordinates of the diameter of the second target circle, the physical coordinates of the center of the first target circle, and the physical coordinates of the center of the second target circle.

[0037] Step 222, based on the physical coordinates of the diameter of the first target circle, the physical coordinates of the diameter of the second target circle, the physical coordinates of the center of the first target circle, and the physical coordinates of the center of the second target circle, determine the relative displacement of the target rigid segment model at the wind speed and the target rigid segment model at the target wind speed.

[0038] Exemplarily, edge detection processes each image to obtain edge pixel points of the first target circle and the second target circle, takes the maximum distance between edge pixel points of the first target circle and the second target circle as the diameter, and the center of the two points with the maximum distance is taken as the center of the circle. The unit length corresponding to the preset pixel is the length of converting the pixel into the physical coordinate, that is, the actual length of each pixel, for example, 1 pixel is 1 mm long.

[0039] Step 103: Obtain the static three-division force coefficient of the target rigid segment model according to the relative displacement and the conversion relationship between the displacement and the force.

[0040] Specifically, the conversion relationship between displacement and force is the relationship between the displacement of the model and the force received by the model, which is obtained by the following conversion relationship. After the relative displacement is obtained, the relative displacement is split into lateral displacement, longitudinal displacement and angular displacement. According to the relative displacement and the conversion relationship between displacement and force, the lateral component force corresponding to the lateral displacement can be obtained, and then the damping coefficient of the target rigid segment model can be obtained. The longitudinal component force corresponding to the displacement is obtained, and then the lift coefficient of the target rigid segment model is obtained. The torque corresponding to the angular displacement is obtained, and then the torque coefficient of the target rigid segment model is obtained.

[0041] The process of determining the conversion relationship between displacement and force is as follows: Figure 3 In the example diagram of the target rigid segment model shown in the figure, the lateral displacement, vertical displacement, and angular displacement of the model after displacement are , , Since both sides of the model are considered to be displaced simultaneously when the model is displaced, only one side needs to be considered. For the four springs used for the suspension on one side, is the original length of the spring, is the stiffness of a spring, , , , They are the total lengths of the springs after static stretching at the left suspension upper end, the right suspension upper end, the left suspension lower end, and the right suspension lower end. , , , They are the total length of the left suspension upper end, the right suspension upper end, the left suspension lower end, and the right suspension lower end. , , , They are the deformation of the springs after static stretching at the left suspension upper end, the right suspension upper end, the left suspension lower end, and the right suspension lower end. , , , They are the total suspension lengths of the left suspension upper end, the right suspension upper end, the left suspension lower end, and the right suspension lower end excluding spring deformation. , , , , , , , As shown in formula 1, Formula 1 In such Figure 3 In the example diagram of the target rigid segment model shown in the figure, that is, for the four springs used on one side of the suspension, , , , are the lateral displacements of the four suspension points on one side in the plane, , , , They are the vertical displacements of the four suspension points on one side in the plane. , , , , , , , It can be expressed by Formula 2 to Formula 5.

[0042] Formula 2 Formula 3 Formula 4 Formula 5 in, Indicates the distance between the left and right suspensions. Indicates the distance between the upper and lower suspensions.

[0043] The conversion relationship between the displacement and force of the spring at the four suspension points on one side is obtained as shown in Formulas 6 to 10.

[0044] Formula 6 Formula 7 Formula 8 Formula 9 Formula 10 in, , , , are the forces after the displacement of the unilateral four-sided spring, , , , They are the angles between the single-sided four-sided spring and the vertical direction after displacement. , , , They are the vertical force components of the spring after the single-sided four-sided spring is displaced. , , , They are the moments of the spring on the center point of the model after the unilateral four-sided spring is displaced. , , After the model is displaced, the vertical force, lateral force and moment corresponding to the displacement are shown.

[0045] The solution of the present application collects target images of the target rigid segment model at multiple wind speeds after the target rigid segment model reaches a steady state; wherein the target of the target rigid segment model includes a first target circle, a second target circle and a cross mark, the cross mark is located at the center of the target, the distance between the center of the first target circle and the center of the target is equal to the distance between the center of the second target circle and the center of the target, and the radius of the first target circle is greater than the radius of the second target circle; for each wind speed, the relative displacement of the target rigid segment model and the target rigid segment model at the target wind speed is determined according to the center position of the first target circle and the center position of the second target circle in the target image; the static three-division force coefficient of the target rigid segment model is obtained according to the relative displacement and the conversion relationship between displacement and force. That is, the solution of the present application determines the relative displacement of the target rigid segment model based on the image, and determines the static three-division force coefficient of the target rigid segment model based on the relative displacement information, thereby avoiding the use of a high-precision force balance to determine the static three-division force coefficient, thereby reducing the experimental cost and the difficulty of experimental installation. There is no need to repeatedly use a high-precision force balance to obtain the static three-division force coefficient in repeated wind tunnel tests, thereby improving the experimental efficiency.

[0046] Figure 2 is another flow chart of the method for determining the static three-force coefficient provided by the present application. Figure 1 Based on the illustrated embodiment and various optional implementation schemes, the steps of obtaining the static three-force coefficients of the target rigid segment model are described in detail. Figure 2 As shown, the method may include the following steps: Step 201 : after the target rigid segment model reaches a steady state, target images of the target rigid segment model under multiple wind speeds are collected.

[0047] Step 202 , for each wind speed, determine the relative displacement between the target rigid segment model at the wind speed and the target rigid segment model at the target wind speed according to the center position of the first target circle and the center position of the second target circle in the target image.

[0048] Step 203: determining the relative lateral displacement, the relative vertical displacement and the relative angular displacement according to the relative displacement.

[0049] Exemplarily, the relative displacement expressed in pixels is split into relative lateral displacement , relative vertical displacement and relative angular displacement The relative lateral displacement, relative vertical displacement, and relative angular displacement expressed in physical length , , It can be expressed as 11.

[0050] Formula 11 in, The physical size of each pixel. For example, the physical size of a pixel is 0.1 mm.

[0051] Step 204 , obtaining the damping coefficient of the target rigid segment model according to the relative lateral displacement and the conversion relationship between the displacement and the force.

[0052] Optionally, the lateral component of the target rigid segment model that changes after the displacement is obtained based on the relative lateral displacement and the conversion relationship between displacement and force, and the damping coefficient of the target rigid segment model is obtained based on the lateral component, preset air density, wind speed and model parameters of the target rigid segment model.

[0053] Specifically, after the relative lateral displacement is obtained, the lateral component force corresponding to the relative lateral displacement that can cause the model to undergo the lateral displacement can be obtained according to the relative lateral displacement and the conversion relationship between displacement and force. The damping coefficient of the target rigid segment model is then obtained according to the lateral component force, the preset air density, the wind speed, and the model parameters of the target rigid segment model. The model parameters of the target rigid segment model include the length, width, and height of the target rigid segment model.

[0054] Exemplarily, obtaining the damping coefficient of the target rigid segment model according to the lateral component force, the preset air density, the wind speed, and the model parameters of the target rigid segment model can be achieved by formula 12.

[0055] Formula 12 in, is the damping coefficient, is the lateral force, is the air density, usually 1.25 Kg / m 3 , is the wind speed, is the height of the model, is the length of the model.

[0056] Step 205 , obtaining the lift coefficient of the target rigid segment model according to the relative longitudinal displacement and the conversion relationship between the displacement and the force.

[0057] Optionally, the longitudinal component force of the target rigid segment model that changes after the displacement is obtained based on the relative longitudinal displacement and the conversion relationship between displacement and force, and the lift coefficient of the target rigid segment model is obtained based on the longitudinal component force, preset air density, wind speed and model parameters of the target rigid segment model.

[0058] Specifically, after the relative longitudinal displacement is obtained, the longitudinal force component corresponding to the relative longitudinal displacement that enables the model to undergo the longitudinal displacement can be obtained according to the relative longitudinal displacement and the conversion relationship between the displacement and the force. The lift coefficient of the target rigid segment model is then obtained according to the longitudinal force component, the preset air density, the wind speed, and the model parameters of the target rigid segment model.

[0059] Exemplarily, obtaining the lift coefficient of the target rigid segment model according to the longitudinal component, the preset air density, the wind speed, and the model parameters of the target rigid segment model can be achieved by formula 13.

[0060] Formula 13 in, is the lift coefficient, is the longitudinal force component, is the air density, usually 1.25 Kg / m 3 , is the wind speed, is the width of the model, is the length of the model.

[0061] Step 206 , obtaining the moment coefficient of the target rigid segment model according to the relative angular displacement and the conversion relationship between the displacement and the force.

[0062] Optionally, the torque of the target rigid segment model after displacement is obtained according to the relative angular displacement and the conversion relationship between displacement and force, and the torque coefficient of the target rigid segment model is obtained according to the torque, preset air density, wind speed and model parameters of the target rigid segment model.

[0063] Specifically, after the relative angular displacement is obtained, the torque corresponding to the relative angular displacement that enables the model to undergo the angular displacement can be obtained according to the relative angular displacement and the conversion relationship between displacement and force. The torque coefficient of the target rigid segment model is then obtained according to the torque, the preset air density, the wind speed, and the model parameters of the target rigid segment model.

[0064] Exemplarily, obtaining the moment coefficient of the target rigid segment model according to the moment, preset air density, wind speed, and model parameters of the target rigid segment model can be implemented by formula 14.

[0065] Formula 14 in, is the torque coefficient, is the torque, is the air density, usually 1.25 Kg / m 3 , is the wind speed, is the height of the model, The width of the model.

[0066] The solution of the present application obtains the static three-component force coefficient of the target rigid segment model based on the lateral component force, longitudinal component force, moment, preset air density, wind speed and model parameters of the target rigid segment model, refines the method for determining the static three-component force coefficient, and further improves the accuracy of the static three-component force coefficient, thereby further reducing the experimental cost and the difficulty of installing the experimental equipment, and further improving the experimental efficiency.

[0067] Figure 4 is a schematic diagram of the structure of the aerodynamic force determination device provided in the present application, and the device is suitable for executing the aerodynamic force determination method provided in the present application. Figure 4 As shown, the device may specifically include: The acquisition module 301 is used to acquire target images of the target rigid segment model under multiple wind speeds after the target rigid segment model is stabilized; wherein the target of the target rigid segment model includes a first target circle, a second target circle and a cross mark, the cross mark is located at the center of the target, the distance between the center of the first target circle and the center of the target is equal to the distance between the center of the second target circle and the center of the target, and the radius of the first target circle is greater than the radius of the second target circle.

[0068] The displacement determination module 302 is used to determine, for each wind speed, the relative displacement of the target rigid segment model at the wind speed and the target rigid segment model at the target wind speed according to the center position of the first target circle and the center position of the second target circle in the target image.

[0069] The coefficient determination module 303 is used to obtain the static three-division force coefficient of the target rigid segment model according to the relative displacement and the conversion relationship between displacement and force.

[0070] In one embodiment, the device also includes: a center determination module, which is used to determine the diameter of the first target circle and the diameter of the second target circle according to the target image before the displacement determination module 302 determines the relative displacement of the target rigid segment model and the target rigid segment model under the target wind speed according to the center position of the first target circle and the center position of the second target circle in the target image; and determines the center position of the first target circle and the center position of the second target circle according to the diameter of the first target circle and the diameter of the second target circle.

[0071] In one embodiment, the displacement determination module 302 is specifically used to: determine the pixel coordinates of the diameter of the first target circle, the pixel coordinates of the diameter of the second target circle, the pixel coordinates of the center of the first target circle, and the pixel coordinates of the center of the second target circle according to the diameter of the first target circle, the diameter of the second target circle, the position of the center of the first target circle, and the position of the center of the second target circle; determine the relative displacement of the target rigid segment model at the wind speed and the target rigid segment model at the target wind speed according to the pixel coordinates of the diameter of the first target circle, the pixel coordinates of the diameter of the second target circle, the pixel coordinates of the center of the first target circle, and the pixel coordinates of the center of the second target circle.

[0072] In one embodiment, the displacement determination module 302 is specifically used to determine the relative displacement of the target rigid segment model and the target rigid segment model at the target wind speed at the wind speed according to the pixel coordinates of the diameter of the first target circle, the pixel coordinates of the diameter of the second target circle, the pixel coordinates of the center of the first target circle, and the pixel coordinates of the center of the second target circle: obtain the physical coordinates of the diameter of the first target circle, the physical coordinates of the diameter of the second target circle, the physical coordinates of the center of the first target circle, and the physical coordinates of the center of the second target circle according to the pixel coordinates of the diameter of the first target circle, the pixel coordinates of the diameter of the second target circle, the pixel coordinates of the center of the first target circle, and the pixel coordinates of the center of the second target circle, and the unit length corresponding to the preset pixels; determine the relative displacement of the target rigid segment model and the target rigid segment model at the target wind speed according to the physical coordinates of the diameter of the first target circle, the physical coordinates of the diameter of the second target circle, the physical coordinates of the center of the first target circle, and the physical coordinates of the center of the second target circle.

[0073] In one embodiment, the static three-force coefficients include a damping coefficient, a lift coefficient and a moment coefficient, and the coefficient determination module 303 is also used to: before obtaining the static three-force coefficients of the target rigid segment model according to the relative displacement and the conversion relationship between the displacement and the force, determine the relative lateral displacement, the relative vertical displacement and the relative angular displacement according to the relative displacement; the coefficient determination module 303 is specifically used to: obtain the damping coefficient of the target rigid segment model according to the relative lateral displacement and the conversion relationship between the displacement and the force; obtain the lift coefficient of the target rigid segment model according to the relative longitudinal displacement and the conversion relationship between the displacement and the force; obtain the moment coefficient of the target rigid segment model according to the relative angular displacement and the conversion relationship between the displacement and the force.

[0074] In one embodiment, the coefficient determination module 303, in terms of obtaining the damping coefficient of the target rigid segment model according to the relative lateral displacement and the conversion relationship between the displacement and the force, is specifically used to: obtain the lateral component force of the target rigid segment model that changes after the displacement according to the relative lateral displacement and the conversion relationship between the displacement and the force, and obtain the damping coefficient of the target rigid segment model according to the lateral component force, the preset air density, the wind speed and the model parameters of the target rigid segment model; the coefficient determination module 303, in terms of obtaining the lift coefficient of the target rigid segment model according to the relative longitudinal displacement and the conversion relationship between the displacement and the force, is specifically used to: obtain the lateral component force of the target rigid segment model that changes after the displacement according to the relative lateral displacement and the conversion relationship between the displacement and the force, and obtain the damping coefficient of the target rigid segment model according to the lateral component force, the preset air density, the wind speed and the model parameters of the target rigid segment model. The longitudinal component of the target rigid segment model that changes after the displacement is obtained according to the conversion relationship, and the lift coefficient of the target rigid segment model is obtained according to the longitudinal component, the preset air density, the wind speed and the model parameters of the target rigid segment model; the coefficient determination module 303 is specifically used for: obtaining the torque of the target rigid segment model that changes after the displacement according to the relative angular displacement and the conversion relationship between the displacement and the force, and obtaining the torque coefficient of the target rigid segment model according to the torque, the preset air density, the wind speed and the model parameters of the target rigid segment model.

[0075] In one embodiment, the target rigid segment model also includes a spring suspension system and a model body; the target is attached to the model body, and the center of the surface where the width and height of the model body are located coincides with the center of the target; the spring suspension system includes a plurality of springs, wherein the lower ends of some springs are connected to the upper end of the model body, and the upper ends of some springs are connected to the lower end of the model body, so as to suspend the model body.

[0076] The device of the present application collects target images of the target rigid segment model under multiple wind speeds after the target rigid segment model is in a steady state; wherein the target of the target rigid segment model includes a first target circle, a second target circle and a cross mark, the cross mark is located at the center of the target, the distance between the center of the first target circle and the center of the target is equal to the distance between the center of the second target circle and the center of the target, and the radius of the first target circle is greater than the radius of the second target circle; for each wind speed, the relative displacement of the target rigid segment model and the target rigid segment model under the target wind speed is determined according to the center position of the first target circle and the center position of the second target circle in the target image; the static three-division force coefficient of the target rigid segment model is obtained according to the relative displacement and the conversion relationship between the displacement and the force. That is, the solution of the present application determines the relative displacement of the target rigid segment model based on the image, and determines the static three-division force coefficient of the target rigid segment model based on the relative displacement information, thereby avoiding the use of a high-precision force balance to determine the static three-division force coefficient, thereby reducing the experimental cost and the difficulty of experimental installation. There is no need to repeatedly use a high-precision force balance to obtain the static three-division force coefficient in repeated wind tunnel tests, thereby improving the experimental efficiency.

[0077] The present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for determining the static three-division force coefficient provided in any of the above-mentioned embodiments is implemented.

[0078] The present application also provides a computer-readable medium having a computer program stored thereon, and when the program is executed by a processor, the method for determining the static three-division force coefficient provided in any of the above embodiments is implemented.

[0079] Reference below Figure 5 , which shows a structural schematic diagram of an electronic device 400 suitable for implementing the present application. Figure 5 The electronic device shown is only an example and should not bring any limitation to the function and scope of use of the present application.

[0080] like Figure 5 As shown, the electronic device 400 includes a central processing unit (CPU) 401, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 402 or a program loaded from a storage part 408 into a random access memory (RAM) 403. In the RAM 403, various programs and data required for the operation of the electronic device 400 are also stored. The CPU 401, the ROM 402, and the RAM 403 are connected to each other via a bus 404. An input / output (I / O) interface 405 is also connected to the bus 404.

[0081] The following components are connected to the I / O interface 405: an input section 406 including a keyboard, a mouse, etc.; an output section 407 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 408 including a hard disk, etc.; and a communication section 409 including a network interface card such as a LAN card, a modem, etc. The communication section 409 performs communication processing via a network such as the Internet. A drive 410 is also connected to the I / O interface 405 as needed. A removable medium 411, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 410 as needed, so that a computer program read therefrom is installed into the storage section 408 as needed.

[0082] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 409, and / or installed from the removable medium 411. When the computer program is executed by the central processing unit (CPU) 401, the above-mentioned functions defined in the system of the present application are executed.

[0083] It should be noted that the computer-readable medium shown in the present application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. This propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0084] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the above-mentioned module, program segment or a part of a code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flow chart, and the combination of the boxes in the block diagram or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0085] The modules and / or units described in this application may be implemented in software or hardware. The modules and / or units described may also be set in a processor, for example, it may be described as: a processor includes an acquisition module, a displacement determination module, and a coefficient determination module. The names of these modules do not, in some cases, constitute limitations on the modules themselves.

[0086] As another aspect, the present application also provides a computer-readable medium, which may be included in the device described in the above embodiment; or may exist independently without being assembled into the device. The above computer-readable medium carries one or more programs, and when the above one or more programs are executed by a device, the device performs the following operations: After the target rigid segment model is in steady state, target images of the target rigid segment model are collected at multiple wind speeds; wherein, the target of the target rigid segment model includes a first target circle, a second target circle and a cross mark, the cross mark is located at the center of the target, the distance between the center of the first target circle and the center of the target is equal to the distance between the center of the second target circle and the center of the target, and the radius of the first target circle is greater than the radius of the second target circle; for each wind speed, the relative displacement of the target rigid segment model and the target rigid segment model at the target wind speed is determined according to the center position of the first target circle and the center position of the second target circle in the target image; the static three-force coefficient of the target rigid segment model is obtained according to the relative displacement and the conversion relationship between the displacement and the force.

[0087] According to the technical solution of the present application, after the target rigid segment model is in a steady state, target images of the target rigid segment model are collected at multiple wind speeds; wherein, the target of the target rigid segment model includes a first target circle, a second target circle and a cross mark, the cross mark is located at the center of the target, the distance between the center of the first target circle and the center of the target is equal to the distance between the center of the second target circle and the center of the target, and the radius of the first target circle is greater than the radius of the second target circle; for each wind speed, the relative displacement of the target rigid segment model and the target rigid segment model at the target wind speed is determined according to the center position of the first target circle and the center position of the second target circle in the target image; the static three-division force coefficient of the target rigid segment model is obtained according to the relative displacement and the conversion relationship between displacement and force. That is, the solution of the present application determines the relative displacement of the target rigid segment model based on the image, and determines the static three-division force coefficient of the target rigid segment model based on the relative displacement information, thereby avoiding the use of a high-precision force balance to determine the static three-division force coefficient, thereby reducing the experimental cost and the difficulty of experimental installation. There is no need to repeatedly use a high-precision force balance to obtain the static three-division force coefficient in repeated wind tunnel tests, thereby improving the experimental efficiency.

[0088] An embodiment of the present application also provides a computer program product, including a computer program, which, when executed by a processor, implements a method for determining a static three-force coefficient as provided in any embodiment of the present application.

[0089] In the process of implementation, the computer program product can be written in one or more programming languages ​​or a combination thereof to perform the computer program code of the present application, and the programming language includes an object-oriented programming language, such as Java, Smalltalk, C++, and also includes a conventional procedural programming language, such as "C" language or similar programming language. The program code can be executed completely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on the remote computer, or completely on the remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

[0090] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the expected results of the technical solution of this application can be achieved, and this document is not limited here.

[0091] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for determining a static three-dimensional force coefficient, characterized in that: The method comprises: After the target rigid segment model is in steady state, target images of the target rigid segment model under multiple wind speeds are collected; wherein the target of the target rigid segment model includes a first target circle, a second target circle and a cross mark, the cross mark is located at the center of the target, the distance between the center of the first target circle and the center of the target is equal to the distance between the center of the second target circle and the center of the target, and the radius of the first target circle is greater than the radius of the second target circle; For each wind speed, determining the relative displacement between the target rigid segment model at the wind speed and the target rigid segment model at the target wind speed according to the center position of the first target circle and the center position of the second target circle in the target image; The static three-force coefficient of the target rigid segment model is obtained according to the relative displacement and the conversion relationship between displacement and force.

2. The method according to claim 1, characterized in that Before determining the relative displacement between the target rigid segment model and the target rigid segment model at the target wind speed according to the center position of the first target circle and the center position of the second target circle in the target image, the method further includes: Determining the diameter of the first target circle and the diameter of the second target circle according to the target image; The center position of the first target circle and the center position of the second target circle are determined according to the diameter of the first target circle and the diameter of the second target circle.

3. The method according to claim 2, characterized in that The determining, according to the center position of the first target circle and the center position of the second target circle in the target image, the relative displacement between the target rigid segment model and the target rigid segment model at the target wind speed at the wind speed comprises: Determine the pixel coordinates of the diameter of the first target circle, the pixel coordinates of the diameter of the second target circle, the pixel coordinates of the center of the first target circle, and the pixel coordinates of the center of the second target circle according to the diameter of the first target circle, the diameter of the second target circle, the center position of the first target circle, and the center position of the second target circle; The relative displacement of the target rigid segment model at the target wind speed and the target rigid segment model at the target wind speed is determined based on the pixel coordinates of the diameter of the first target circle, the pixel coordinates of the diameter of the second target circle, the pixel coordinates of the center of the first target circle, and the pixel coordinates of the center of the second target circle.

4. The method according to claim 3, characterized in that The determining, according to the pixel coordinates of the diameter of the first target circle, the pixel coordinates of the diameter of the second target circle, the pixel coordinates of the center of the first target circle, and the pixel coordinates of the center of the second target circle, the relative displacement of the target rigid segment model at the wind speed and the target rigid segment model at the target wind speed comprises: Obtaining the physical coordinates of the diameter of the first target circle, the physical coordinates of the diameter of the second target circle, the physical coordinates of the center of the first target circle, and the physical coordinates of the center of the second target circle according to the pixel coordinates of the diameter of the first target circle, the pixel coordinates of the diameter of the second target circle, the pixel coordinates of the center of the first target circle, and the pixel coordinates of the center of the second target circle, and a preset unit length corresponding to pixels; The relative displacement between the target rigid segment model at the target wind speed and the target rigid segment model at the target wind speed is determined based on the physical coordinates of the diameter of the first target circle, the physical coordinates of the diameter of the second target circle, the physical coordinates of the center of the first target circle, and the physical coordinates of the center of the second target circle.

5. The method according to claim 1, characterized in that The static three-force coefficients include a damping coefficient, a lift coefficient and a moment coefficient. Before obtaining the static three-force coefficients of the target rigid segment model according to the relative displacement and the conversion relationship between the displacement and the force, the method further includes: Determining a relative lateral displacement, a relative vertical displacement, and a relative angular displacement according to the relative displacement; The static three-force coefficient of the target rigid segment model is obtained according to the relative displacement and the conversion relationship between the displacement and the force, including: Obtaining a damping coefficient of the target rigid segment model according to the relative lateral displacement and the conversion relationship between the displacement and the force; Obtaining the lift coefficient of the target rigid segment model according to the relative longitudinal displacement and the conversion relationship between the displacement and the force; The moment coefficient of the target rigid segment model is obtained according to the relative angular displacement and the conversion relationship between the displacement and force.

6. The method according to claim 5, characterized in that The obtaining of the damping coefficient of the target rigid segment model according to the relative lateral displacement and the conversion relationship between the displacement and the force comprises: Obtaining a lateral component force of the target rigid segment model that changes after the displacement according to the relative lateral displacement and the conversion relationship between the displacement and the force, and obtaining a damping coefficient of the target rigid segment model according to the lateral component force, a preset air density, the wind speed, and a model parameter of the target rigid segment model; The step of obtaining the lift coefficient of the target rigid segment model according to the relative longitudinal displacement and the conversion relationship between the displacement and the force includes: Obtaining a longitudinal force component of the target rigid segment model that changes after the displacement according to the relative longitudinal displacement and the conversion relationship between the displacement and the force, and obtaining a lift coefficient of the target rigid segment model according to the longitudinal force component, a preset air density, the wind speed, and a model parameter of the target rigid segment model; The moment coefficient of the target rigid segment model is obtained according to the relative angular displacement and the conversion relationship between the displacement and the force, including: The torque of the target rigid segment model after the displacement is obtained according to the relative angular displacement and the conversion relationship between the displacement and the force, and the torque coefficient of the target rigid segment model is obtained according to the torque, the preset air density, the wind speed and the model parameters of the target rigid segment model.

7. The method according to claim 1, characterized in that The target rigid segment model also includes a spring suspension system and a model body; The target is attached to the model body, and the center of the surface where the width and height of the model body are located coincides with the center of the target; The spring suspension system includes a plurality of springs, wherein the lower ends of some springs are connected to the upper end of the model body, and the upper ends of some springs are connected to the lower end of the model body, so that the model body is suspended.

8. A device for determining static three-dimensional force coefficient, characterized in that: The device comprises: An acquisition module is used to acquire target images of the target rigid segment model at multiple wind speeds after the target rigid segment model is in a steady state; wherein the target of the target rigid segment model includes a first target circle, a second target circle and a cross mark, the cross mark is located at the center of the target, the distance between the center of the first target circle and the center of the target is equal to the distance between the center of the second target circle and the center of the target, and the radius of the first target circle is greater than the radius of the second target circle; a displacement determination module, for determining, for each wind speed, a relative displacement between the target rigid segment model and the target rigid segment model at a target wind speed according to the center position of the first target circle and the center position of the second target circle in the target image; The coefficient determination module is used to obtain the static three-division force coefficient of the target rigid segment model according to the relative displacement and the conversion relationship between displacement and force.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method for determining the static three-division force coefficient as described in any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method for determining the static three-division force coefficient as claimed in any one of claims 1 to 7 is implemented.

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