A method and system for testing bending moment and shear force of offshore wind turbine components

Abstract

This invention provides a method and system for testing the bending moment and shear force of offshore wind turbine components. The method involves acquiring a first measured strain value for a first measurement section and a second measured strain value for a second measurement section; calculating a first dynamic bending moment value for the first measurement section based on the elastic modulus, section modulus, the first measured strain value, and the yoke coefficient; calculating a second dynamic bending moment value for the second measurement section based on the elastic modulus, section modulus, the second measured strain value, and the yoke coefficient; and calculating the shear force value for the offshore wind turbine tower based on the first and second dynamic bending moment values. This method enables the testing of bending moment and shear force loads on offshore wind turbine towers, improving the design efficiency of offshore wind turbine towers.

Description

Technical Field

[0001] This invention relates to the field of testing technology for bending moment and shear force of offshore wind turbine components, and in particular to a method for testing bending moment and shear force of offshore wind turbine components, a system for testing bending moment and shear force of offshore wind turbine components, an electronic device, and a computer-readable storage medium. Background Technology

[0002] As the load transfer structure between the wind turbine foundation and the upper tower, the offshore wind turbine tower is responsible for transferring the load from the upper part of the wind turbine to the tower in the real marine environment, and then from the tower to the jacket foundation. Therefore, the actual load capacity of the connection between the jacket and the tower is crucial for the design. Summary of the Invention

[0003] The present invention provides a method, system, electronic device, and computer-readable storage medium for testing bending moment and shear force of offshore wind turbine components, in order to overcome or at least partially solve the above-mentioned problems.

[0004] This invention discloses a method for testing the bending moment and shear force of offshore wind turbine components. The method is applied to a testing system for the bending moment and shear force of offshore wind turbine components, wherein the offshore wind turbine components include at least an offshore wind turbine tower, comprising:

[0005] The first and second measurement sections of the offshore wind turbine tower are determined according to a preset interval distance; the testing system for bending moment and shear force of the offshore wind turbine component is equipped with at least two sets of strain value acquisition units for the first and second measurement sections. The strain value acquisition unit includes a first strain gauge and a second strain gauge for the horizontal direction, and a third strain gauge and a fourth strain gauge for the vertical direction; the first strain gauge and the fourth strain gauge are arranged adjacently and vertically to form a first strain gauge group, and the second strain gauge and the third strain gauge are arranged adjacently and vertically to form a second strain gauge group. The first strain gauge group and the second strain gauge group are respectively arranged on both sides of the offshore wind turbine tower, forming a set of strain value acquisition units;

[0006] Determine the bridge arm coefficient for the aforementioned offshore wind turbine tower;

[0007] Determine the elastic modulus and section modulus of the offshore wind turbine tower;

[0008] A strain value acquisition unit for the first measurement section is used to acquire a first measured strain value for the first measurement section, and a strain value acquisition unit for the second measurement section is used to acquire a second measured strain value for the second measurement section.

[0009] Based on the elastic modulus, the section modulus, the first measured strain value, and the bridge arm coefficient, calculate the first dynamic bending moment value for the first measured section.

[0010] Based on the elastic modulus, the section modulus, the second measured strain value, and the bridge arm coefficient, calculate the second dynamic bending moment value for the second measured section;

[0011] The shear force value for the offshore wind turbine tower is calculated based on the first dynamic bending moment value and the second dynamic bending moment value.

[0012] Optionally, multiple sets of strain value acquisition units are arranged on the same vertical line, and the arrangement direction of the strain value acquisition units is determined based on the bending direction of the offshore wind turbine tower.

[0013] Optionally, the step of calculating the first dynamic bending moment value for the first measured section based on the elastic modulus, the section modulus, the first measured strain value, and the bridge arm coefficient includes:

[0014] The elastic modulus, the section modulus, the first measured strain value, and the bridge arm coefficient are input into Formula 1 to calculate the first dynamic bending moment value for the first measured section. Formula 1 is as follows:

[0015] M1=E·W·ε 测 1 / A

[0016] Where M1 is the first dynamic bending moment value, E is the elastic modulus, W is the section modulus, and ε 测1 Let A be the first measured strain value, and let A be the bridge arm coefficient.

[0017] Optionally, the step of calculating the second dynamic bending moment value for the second measured section based on the elastic modulus, the section modulus, the second measured strain value, and the bridge arm coefficient includes:

[0018] The elastic modulus, the section modulus, the second measured strain value, and the bridge arm coefficient are input into Formula 2 to calculate the second dynamic bending moment value for the second measured section. Formula 2 is as follows:

[0019] M2=E·W·ε 测 2 / A

[0020] Where M2 is the second dynamic bending moment value, E is the elastic modulus, W is the section modulus, and ε 测2 The second measured strain value is denoted as A, and the bridge arm coefficient is denoted as A.

[0021] Optionally, the step of calculating the shear force value for the offshore wind turbine tower based on the first dynamic bending moment value and the second dynamic bending moment value includes:

[0022] Determine the length of the offshore wind turbine tower;

[0023] The relationship between the bending moment changes of the first measuring section and the second measuring section is determined based on the first dynamic bending moment value and the second dynamic bending moment value;

[0024] The shear force value for the offshore wind turbine tower is calculated based on the length of the offshore wind turbine tower, the bending moment variation relationship, and the preset interval distance.

[0025] Optionally, the strain value acquisition unit is configured with a first welding terminal for the first strain gauge group and a second welding terminal for the second strain gauge group; the first welding terminal and the second welding terminal are used for signal transmission;

[0026] The testing system for bending moment and shear force of the offshore wind turbine components includes a third welded terminal for acquiring signals;

[0027] The wiring terminals of the first strain gauge assembly are connected to the welding points of the third welding terminal via the first welding terminal;

[0028] The wiring terminals of the second strain gauge assembly are connected to the welding points of the third welding terminal via the second welding terminal.

[0029] Optionally, the terminals of the first strain gauge group are sequentially connected to the first welding pins of the first welding terminal, and the terminals of the multiple first strain gauge groups correspond one-to-one with the multiple first welding pins;

[0030] The terminals of the second strain gauge group are sequentially connected to the second welding pins of the second welding terminal, and the terminals of the multiple second strain gauge groups correspond one-to-one with the multiple second welding pins;

[0031] The first terminal of the first strain gauge and the first terminal of the fourth strain gauge are connected to the first welding point of the third welding terminal through the first welding pin;

[0032] The second terminal of the first strain gauge is connected to the third welding point of the third welding terminal through the first welding pin;

[0033] The second connector of the second strain gauge is connected to the third welding point of the third welding terminal via the second welding pin;

[0034] The first terminal of the second strain gauge and the second terminal of the third strain gauge are connected to the fourth welding point of the third welding terminal via the second welding pin;

[0035] The first connector of the third strain gauge is connected to the second welding point of the third welding terminal via the second welding pin;

[0036] The second connector of the fourth strain gauge is connected to the second welding point of the third welding terminal through the first welding pin.

[0037] This invention also discloses a testing system for bending moment and shear force of offshore wind turbine components, wherein the offshore wind turbine components include at least an offshore wind turbine tower, comprising:

[0038] The measurement section determination module is used to determine a first measurement section and a second measurement section for the offshore wind turbine tower at preset intervals. The testing system for bending moment and shear force of the offshore wind turbine component is equipped with at least two sets of strain value acquisition units for the first measurement section and the second measurement section. The strain value acquisition unit includes a first strain gauge and a second strain gauge for the horizontal direction, and a third strain gauge and a fourth strain gauge for the vertical direction. The first strain gauge and the fourth strain gauge are arranged adjacently and vertically to form a first strain gauge group, and the second strain gauge and the third strain gauge are arranged adjacently and vertically to form a second strain gauge group. The first strain gauge group and the second strain gauge group are respectively arranged on both sides of the offshore wind turbine tower, forming a set of strain value acquisition units.

[0039] The arm coefficient determination module is used to determine the arm coefficient for the offshore wind turbine tower.

[0040] The material parameter module is used to determine the elastic modulus and section modulus of the offshore wind turbine tower.

[0041] The strain value acquisition module is used to acquire a first strain value for the first measurement section using the strain value acquisition unit for the first measurement section, and to acquire a second strain value for the second measurement section using the strain value acquisition unit for the second measurement section;

[0042] The first dynamic bending moment calculation module is used to calculate the first dynamic bending moment value for the first measured section based on the elastic modulus, the section modulus, the first measured strain value and the bridge arm coefficient.

[0043] The second dynamic bending moment calculation module is used to calculate the second dynamic bending moment value for the second measured section based on the elastic modulus, the section modulus, the second measured strain value and the bridge arm coefficient.

[0044] The shear force calculation module is used to calculate the shear force value for the offshore wind turbine tower based on the first dynamic bending moment value and the second dynamic bending moment value.

[0045] Optionally, multiple sets of strain value acquisition units are arranged on the same vertical line, and the arrangement direction of the strain value acquisition units is determined based on the bending direction of the offshore wind turbine tower.

[0046] Optionally, the first dynamic bending moment calculation module is further used for:

[0047] The elastic modulus, the section modulus, the first measured strain value, and the bridge arm coefficient are input into Formula 1 to calculate the first dynamic bending moment value for the first measured section. Formula 1 is as follows:

[0048] M1=E·W·ε 测1 / A

[0049] Where M1 is the first dynamic bending moment value, E is the elastic modulus, W is the section modulus, and ε 测1 Let A be the first measured strain value, and let A be the bridge arm coefficient.

[0050] Optionally, the second dynamic bending moment calculation module is further used for:

[0051] The elastic modulus, the section modulus, the second measured strain value, and the bridge arm coefficient are input into Formula 2 to calculate the second dynamic bending moment value for the second measured section. Formula 2 is as follows:

[0052] M2=E·W·ε 测2 / A

[0053] Where M2 is the second dynamic bending moment value, E is the elastic modulus, W is the section modulus, and ε 测2 The second measured strain value is denoted as A, and the bridge arm coefficient is denoted as A.

[0054] Optionally, the shear force calculation module is further used for:

[0055] Determine the length of the offshore wind turbine tower;

[0056] The relationship between the bending moment changes of the first measuring section and the second measuring section is determined based on the first dynamic bending moment value and the second dynamic bending moment value;

[0057] The shear force value for the offshore wind turbine tower is calculated based on the length of the offshore wind turbine tower, the bending moment variation relationship, and the preset interval distance.

[0058] Optionally, the strain value acquisition unit is configured with a first welding terminal for the first strain gauge group and a second welding terminal for the second strain gauge group; the first welding terminal and the second welding terminal are used for signal transmission;

[0059] The testing system for bending moment and shear force of the offshore wind turbine components includes a third welded terminal for acquiring signals;

[0060] The wiring terminals of the first strain gauge assembly are connected to the welding points of the third welding terminal via the first welding terminal;

[0061] The wiring terminals of the second strain gauge assembly are connected to the welding points of the third welding terminal via the second welding terminal.

[0062] This invention also discloses an electronic device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus;

[0063] The memory is used to store computer programs;

[0064] When the processor executes a program stored in the memory, it implements the method described in the embodiments of the present invention.

[0065] This invention also discloses a computer-readable storage medium storing instructions that, when executed by one or more processors, cause the processors to perform the methods described in this invention.

[0066] The embodiments of the present invention have the following advantages:

[0067] In this embodiment of the invention, a first and second measurement sections for the offshore wind turbine tower are determined at preset intervals; the jib coefficient for the offshore wind turbine tower is determined; the tower's elastic modulus and section modulus are determined; a strain value acquisition unit for the first measurement section is used to acquire a first measured strain value for the first measurement section, and a strain value acquisition unit for the second measurement section is used to acquire a second measured strain value for the second measurement section; based on the elastic modulus, the section modulus, the first measured strain value, and the jib coefficient, a first dynamic bending moment value for the first measurement section is calculated; based on the elastic modulus, the section modulus, the second measured strain value, and the jib coefficient, a second dynamic bending moment value for the second measurement section is calculated; based on the first and second dynamic bending moment values, a shear force value for the offshore wind turbine tower is calculated, thereby enabling the testing of bending moment and shear loads on the offshore wind turbine tower and improving the design efficiency of the offshore wind turbine tower.

[0068] Furthermore, since the strain gauges are arranged in two directions during bending moment measurement—parallel to the prevailing wind direction and perpendicular to it—bending moments in both directions can be obtained. If strain value acquisition units are arranged on the first and second measurement sections respectively, horizontal shear forces in both directions can be obtained, thereby improving the testing efficiency for bending moment and shear loads on offshore wind turbine towers.

[0069] Furthermore, by using the wiring method described above, signal transmission and acquisition are effectively realized when the strain value acquisition unit generates signals to characterize the horizontal shear force in two directions, thereby improving the testing efficiency for bending moment and shear loads of offshore wind turbine towers. Attached Figure Description

[0070] Figure 1 This is a flowchart illustrating the steps of a method for testing the bending moment and shear force of an offshore wind turbine component, as provided in an embodiment of the present invention.

[0071] Figure 2 This is a schematic diagram of the structure of a strain value acquisition unit provided in an embodiment of the present invention;

[0072] Figure 3 This is a schematic diagram of another strain value acquisition unit provided in an embodiment of the present invention;

[0073] Figure 4 This is a top view of a strain value acquisition unit provided in an embodiment of the present invention;

[0074] Figure 5 This is a schematic diagram of the structure of a signal transmission unit provided in an embodiment of the present invention;

[0075] Figure 6 This is a schematic diagram of the structure of a signal acquisition unit provided in an embodiment of the present invention;

[0076] Figure 7 This is a structural block diagram of a testing system for bending moment and shear force of offshore wind turbine components provided in an embodiment of the present invention;

[0077] Figure 8 This is a hardware structure block diagram of an electronic device provided in an embodiment of the present invention;

[0078] Figure 9 This is a schematic diagram of a computer-readable medium provided in an embodiment of the present invention. Detailed Implementation

[0079] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0080] Bending moment and shear force are two important concepts in mechanics of materials, which have a significant impact on the stress state and deformation of structural members.

[0081] Bending moment is the force that causes a structural member to bend. Its magnitude is equal to the force acting on the member multiplied by the perpendicular distance from that force to the member's support. Bending moment causes bending deformation in a member; the greater the bending moment, the greater the deformation.

[0082] Shear force is an internal force perpendicular to the axis of a structural member. Its magnitude is equal to the lateral component of all external forces acting on the member's cross-section. Shear force causes shear deformation in the member; the greater the shear force, the greater the deformation.

[0083] The effects of bending moment and shear force are as follows:

[0084] Bending moment causes bending deformation in structural members; the greater the bending moment, the greater the deformation. Bending deformation generates stress in the cross-section of the member, and excessive stress can lead to fracture. Therefore, when designing structural members, it is necessary to consider the impact of bending moment and take measures to improve the member's bending resistance.

[0085] Shear force causes shear deformation in structural members; the greater the shear force, the greater the deformation. Shear deformation generates shear stress in the cross-section of the member, and excessive shear stress can lead to shear fracture. Therefore, when designing structural members, it is necessary to consider the impact of shear force and take measures to improve the member's shear resistance.

[0086] Bending moment and shear force are interconnected. In most cases, bending moment and shear force act simultaneously on a member. Bending moment induces shear force, and shear force induces bending moment. Therefore, when analyzing the stress state of a member, the effects of both bending moment and shear force must be considered.

[0087] In specific implementations, the methods for calculating bending moment and shear force involved in the embodiments of the present invention may include:

[0088] Section method: The section method is one of the most commonly used methods for analyzing the stress state of a structural member. It determines bending moment and shear force by analyzing the internal force equilibrium of the member's cross-sections.

[0089] Differential method: The differential method is a method for determining bending moment and shear force based on the mechanical equilibrium equations. It requires first determining the load distribution on the member, and then using the mechanical equilibrium equations to determine the bending moment and shear force.

[0090] Finite element method: The finite element method is a numerical calculation method that divides a component into many small elements and then solves the mechanical equilibrium equations of the elements to obtain the bending moment and shear force of the entire component.

[0091] In practical engineering, appropriate calculation methods can be selected to determine bending moment and shear force based on specific circumstances.

[0092] Applications related to bending moment and shear force can include:

[0093] Structural design: In structural design, engineers need to calculate the bending moment and shear force on the components and select appropriate materials and dimensions based on the calculation results to ensure the safety and reliability of the structure.

[0094] Mechanical manufacturing: In mechanical manufacturing, engineers need to calculate the bending moment and shear force on parts, and select appropriate processing technology and materials based on the calculation results to ensure the strength and durability of the parts.

[0095] Materials Science: In materials science, researchers study the bending and shear resistance of materials, which is of great significance for developing new materials and improving material properties.

[0096] Bending moment and shear force are two important concepts in mechanics of materials, which have a significant impact on the stress state and deformation of structural members. They are also widely used in engineering practice.

[0097] Reference Figure 1 The diagram illustrates a step-by-step flowchart of a method for testing the bending moment and shear force of an offshore wind turbine component according to an embodiment of the present invention, which may specifically include the following steps:

[0098] Step S1: Determine the first and second measurement sections for the offshore wind turbine tower according to a preset interval distance;

[0099] Step S2: Determine the boom coefficient for the offshore wind turbine tower.

[0100] Step S3: Determine the elastic modulus and section modulus of the offshore wind turbine tower.

[0101] Step S4: Use the strain value acquisition unit for the first measurement section to acquire a first measured strain value for the first measurement section, and use the strain value acquisition unit for the second measurement section to acquire a second measured strain value for the second measurement section;

[0102] Step S5: Calculate the first dynamic bending moment value for the first measured section based on the elastic modulus, the section modulus, the first measured strain value, and the bridge arm coefficient.

[0103] Step S6: Calculate the second dynamic bending moment value for the second measured section based on the elastic modulus, the section modulus, the second measured strain value, and the bridge arm coefficient;

[0104] Step S7: Calculate the shear force value for the offshore wind turbine tower based on the first dynamic bending moment value and the second dynamic bending moment value.

[0105] In specific implementations, embodiments of the present invention can be applied to a testing system for bending moment and shear force of offshore wind turbine components. This system may include strain gauges for acquiring strain values, as well as a signal transmission unit, a signal acquisition unit, and data processing equipment. Optionally, the method can also be applied to a testing system for bending moment and shear force loads on components with annular cross-sections, such as blade roots and steel pipe piles.

[0106] In practical applications, bending moment and shear force are forces acting inside a structural member, and they cannot be directly measured. Therefore, it is necessary to determine the bending moment and shear force by analyzing the internal force equilibrium of the member's cross-sections. Consider a member with a known stress state, and take two cross-sections at any given point. These two cross-sections can be considered as separate mechanical systems. For these two mechanical systems, the moment equilibrium equations and shear force equilibrium equations can be established separately. These two equations are independent because they are derived from different cross-sections.

[0107] The offshore wind power components of this invention include at least an offshore wind power tower. A first measurement section and a second measurement section for the offshore wind power tower can be determined at a preset interval. For example, the section that needs to be measured first is determined as the first measurement section, and the second measurement section is located 50cm above the first measurement section (the distance can be a long integer degree for easy measurement). Preferably, the distance between the first measurement section and the second measurement section is an integer distance.

[0108] Of course, the above examples are merely illustrative, and those skilled in the art can use any distance as the preset interval distance. In this regard, the embodiments of the present invention do not limit it.

[0109] After determining the first and second measurement sections, the arm coefficient and material parameters of the strain value acquisition unit layout scheme for offshore wind turbine towers can be determined. The material parameters include at least the tower's elastic modulus and section modulus.

[0110] In the process of measuring bending moment and shear force, the bridge arm coefficient, the elastic modulus of the tower, and the section modulus are three important parameters that have a significant impact on the calculation results.

[0111] The sling factor is the ratio of the distance from the centroid of the tower section to the neutral axis to the section modulus. It is a dimensionless quantity. The sling factor reflects the influence of the cross-sectional shape on the resistance to bending moment. The larger the sling factor, the greater the resistance of the cross-section to bending moment.

[0112] The elastic modulus refers to the unit strain of a material under unit stress. It is a mechanical parameter. The elastic modulus reflects the stiffness of the tower material. The larger the elastic modulus, the greater the stiffness of the material and the stronger its resistance to deformation.

[0113] Section modulus is the ratio of the section's moment of inertia about its neutral axis to its maximum distance from the center. It is a mechanical parameter. Section modulus reflects the influence of the section shape on its resistance to bending moment. The larger the section modulus, the greater the section's resistance to bending moment.

[0114] In this embodiment of the invention, a strain value acquisition unit for a first measurement section can be used to acquire a first measurement strain value for the first measurement section, and a strain value acquisition unit for a second measurement section can be used to acquire a second measurement strain value for the second measurement section.

[0115] By using a strain value acquisition unit for the first measurement section to acquire the first measured strain value, and using a strain value acquisition unit for the second measurement section to acquire the second measured strain value, strain value data for different sections can be acquired separately, thus improving the acquisition accuracy of strain values.

[0116] After obtaining the first measured strain value for the first measurement section and the second measured strain value for the second measurement section using strain gauges, embodiments of the present invention can calculate the first dynamic bending moment value for the first measurement section and the second dynamic bending moment value for the second measurement section based on the elastic modulus, section modulus, first measured strain value, second measured strain value, and bridge arm coefficient. Furthermore, the shear force value for the offshore wind turbine tower can be calculated based on the first and second dynamic bending moment values, thereby realizing the testing of bending moment and shear force of offshore wind turbine components.

[0117] In a specific implementation, the testing system for bending moment and shear force of offshore wind turbine components in this embodiment of the invention is configured with at least two sets of strain value acquisition units for a first measurement section and a second measurement section. The strain value acquisition unit includes a first strain gauge and a second strain gauge for the horizontal direction, and a third strain gauge and a fourth strain gauge for the vertical direction. The first strain gauge and the fourth strain gauge are arranged adjacent to each other and vertically to form a first strain gauge group, and the second strain gauge and the third strain gauge are arranged adjacent to each other and vertically to form a second strain gauge group. The first strain gauge group and the second strain gauge group are respectively arranged on both sides of the offshore wind turbine tower to form a set of strain value acquisition units.

[0118] Optionally, multiple sets of strain value acquisition units are arranged on the same vertical line, and the arrangement direction of the strain value acquisition units is determined based on the bending direction of the offshore wind turbine tower.

[0119] refer to Figures 2-4 , Figure 2 This is a schematic diagram of the structure of a strain value acquisition unit provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of another strain value acquisition unit provided in an embodiment of the present invention; Figure 4This is a top view of a strain value acquisition unit provided in an embodiment of the present invention.

[0120] The section to be measured is defined as the first measurement section. Strain sensors are symmetrically arranged on both sides of the tower. Each side has two single straight strain gauges. The first strain gauge 101 is installed perpendicularly to and adjacent to the fourth strain gauge 104, and the second strain gauge 102 is installed perpendicularly to and adjacent to the third strain gauge 103. The first strain gauge 101 and the fourth strain gauge 104 constitute the first strain gauge group, and the second strain gauge 102 and the third strain gauge 103 constitute the second strain gauge group. The first strain gauge group and the second strain gauge group constitute a strain value acquisition unit. The second measurement section is located 50 cm upward from the first measurement section (the distance can be a long integer degree for convenient measurement). The distance between the first measurement section and the second measurement section is selected as an integer distance. Strain value acquisition units are installed on the first measurement section and the second measurement section respectively. The installation direction of the strain value acquisition unit can be determined by the bending direction 100 of the offshore wind turbine tower.

[0121] The strain value acquisition unit 200 of the first measurement section and the strain value acquisition unit 201 of the second measurement section are aligned along the same vertical line. The arrangement direction of the strain value acquisition unit 203 is determined based on the bending direction 202 of the offshore wind turbine tower. Optionally, the bending direction 202 can be determined according to the prevailing wind direction of the wind farm throughout the year.

[0122] Multiple sets of the first and second strain gauges can be symmetrically arranged at uniform intervals around the first or second measuring section (360 degrees) as needed to obtain bending moment and shear force in various directions.

[0123] In an embodiment of the present invention, the strain value acquisition unit is configured with a first welding terminal for the first strain gauge group and a second welding terminal for the second strain gauge group; the first welding terminal and the second welding terminal are used for signal transmission;

[0124] The testing system for bending moment and shear force of the offshore wind turbine components includes a third welded terminal for acquiring signals;

[0125] The wiring terminals of the first strain gauge assembly are connected to the welding points of the third welding terminal via the first welding terminal;

[0126] The wiring terminals of the second strain gauge assembly are connected to the welding points of the third welding terminal via the second welding terminal;

[0127] The terminals of the first strain gauge group are sequentially connected to the first welding pins of the first welding terminal, and the terminals of the multiple first strain gauge groups correspond one-to-one with the multiple first welding pins.

[0128] The terminals of the second strain gauge group are sequentially connected to the second welding pins of the second welding terminal, and the terminals of the multiple second strain gauge groups correspond one-to-one with the multiple second welding pins;

[0129] The first terminal of the first strain gauge and the first terminal of the fourth strain gauge are connected to the first welding point of the third welding terminal through the first welding pin;

[0130] The second terminal of the first strain gauge is connected to the third welding point of the third welding terminal through the first welding pin;

[0131] The second connector of the second strain gauge is connected to the third welding point of the third welding terminal via the second welding pin;

[0132] The first terminal of the second strain gauge and the second terminal of the third strain gauge are connected to the fourth welding point of the third welding terminal through the second welding pin;

[0133] The first connector of the third strain gauge is connected to the second welding point of the third welding terminal via the second welding pin;

[0134] The second connector of the fourth strain gauge is connected to the second welding point of the third welding terminal via the first welding pin.

[0135] In a specific implementation, the embodiments of the present invention can first grind the inner wall of the tower until the silver steel body is exposed. The grinding area is more than twice the area of ​​the strain gauge. Then, a polishing machine is used to polish the surface of the steel to facilitate the tight adhesion of the strain gauge. According to the installation plan, the position is marked with a steel needle and cleaned with alcohol. Then, the strain gauges are glued to the inner wall of the tower in sequence, and corresponding welding terminals are attached according to the number of strain gauges. Finally, the surface of the strain gauges is protected to avoid damage to the strain gauges, thus completing the installation work.

[0136] refer to Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the structure of a signal transmission unit provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a signal acquisition unit provided in an embodiment of the present invention;

[0137] The embodiments of the present invention can also construct a signal transmission unit to complete the wiring of the strain gauges in the following manner. Assuming that the direction of the tower bending moment has been determined, the stress analysis and calculation of the tower section are performed to determine the tensile and compressive directions of the strain. Generally, the strain gauge can be defined as bearing tensile stress in the positive direction and bearing compressive stress in the negative direction. Based on the bending direction 100, the strain value of the first strain gauge 101 is negative, the strain value of the fourth strain gauge 104 is positive, the strain value of the second strain gauge 102 is positive, and the strain value of the third strain gauge 103 is negative.

[0138] Each strain gauge in the first strain gauge group has two terminals. The number of terminals in the first strain gauge group is the same as the number of first welding pins, and they are in a one-to-one correspondence. The terminals of the first strain gauge 101 and the fourth strain gauge 104 are connected to the first welding pins of the first welding terminal 301 in sequence.

[0139] Each strain gauge in the second strain gauge group also has two terminals. The number of terminals in the second strain gauge group is the same as the number of second welding pins, and they are in a one-to-one correspondence. The second strain gauge 102 and the third strain gauge 103 are connected to the second welding pins of the second welding terminal 302 in sequence.

[0140] The first terminal of the first strain gauge 101 and the first terminal of the fourth strain gauge 104 are connected to the first welding point 304 of the third welding terminal 303 via wires.

[0141] The second terminal of the first strain gauge 101 and the second terminal of the second strain gauge 102 are connected to the third welding point 306 of the third welding terminal 303 via wires;

[0142] The first terminal of the second strain gauge 102 and the second terminal of the third strain gauge 103 are connected to the fourth welding point 307 of the third welding terminal 303 via wires.

[0143] Connect the first terminal of the third strain gauge 103 and the second terminal of the fourth strain gauge 104 to the second solder point 305 of the third solder terminal 303 via a wire. This completes the wiring connection of the strain sensor.

[0144] In this embodiment of the invention, a signal acquisition unit can be constructed in the following manner so that the data processing device can acquire the corresponding signal.

[0145] Connect the third welding terminal 303 to the strain acquisition device, set the sampling frequency, and acquire strain data. The wires can be 4-wire or 6-wire connected.

[0146] For a 4-wire system, the first solder point 304 of the third solder terminal 303 is connected to a wire and is positively connected to the excitation voltage of the data acquisition instrument; the second solder point 305 is connected to a wire and is positively connected to the signal of the data acquisition instrument; the third solder point 306 is connected to a wire and is negatively connected to the excitation voltage of the data acquisition instrument; and the fourth solder point 307 is connected to a wire and is negatively connected to the signal of the data acquisition instrument.

[0147] For a 6-wire system, the first solder point of the third solder terminal 303 is connected to two wires, which are respectively connected to the positive excitation voltage of the data acquisition instrument and the positive sensor lead. The second solder point 305 is connected to one wire, which is connected to the positive signal of the data acquisition instrument. The third solder point 306 is connected to two wires, which are respectively connected to the negative excitation voltage of the data acquisition instrument and the negative sensor lead. The fourth solder point 307 is connected to one wire, which is connected to the negative signal of the data acquisition instrument.

[0148] In this embodiment of the invention, a first and second measurement sections for the offshore wind turbine tower are determined at preset intervals; the jib coefficient for the offshore wind turbine tower is determined; the tower's elastic modulus and section modulus are determined; a strain value acquisition unit for the first measurement section is used to acquire a first measured strain value for the first measurement section, and a strain value acquisition unit for the second measurement section is used to acquire a second measured strain value for the second measurement section; based on the elastic modulus, the section modulus, the first measured strain value, and the jib coefficient, a first dynamic bending moment value for the first measurement section is calculated; based on the elastic modulus, the section modulus, the second measured strain value, and the jib coefficient, a second dynamic bending moment value for the second measurement section is calculated; based on the first and second dynamic bending moment values, a shear force value for the offshore wind turbine tower is calculated, thereby enabling the testing of bending moment and shear loads on the offshore wind turbine tower and improving the design efficiency of the offshore wind turbine tower.

[0149] Furthermore, since the strain gauges are arranged in two directions during bending moment measurement—parallel to the prevailing wind direction and perpendicular to it—bending moments in both directions can be obtained. If strain value acquisition units are arranged on the first and second measurement sections respectively, horizontal shear forces in both directions can be obtained, thereby improving the testing efficiency for bending moment and shear loads on offshore wind turbine towers.

[0150] Furthermore, by using the wiring method described above, signal transmission and acquisition are effectively realized when the strain value acquisition unit generates signals to characterize the horizontal shear force in two directions, thereby improving the testing efficiency for bending moment and shear loads of offshore wind turbine towers.

[0151] Based on the above embodiments, modified embodiments of the above embodiments are proposed. It should be noted that, in order to keep the description brief, only the differences from the above embodiments are described in the modified embodiments.

[0152] In an optional embodiment of the present invention, the step of calculating the first dynamic bending moment value for the first measured section based on the elastic modulus, the section modulus, the first measured strain value, and the bridge arm coefficient includes:

[0153] The elastic modulus, the section modulus, the first measured strain value, and the bridge arm coefficient are input into Formula 1 to calculate the first dynamic bending moment value M1 for the first measured section. Formula 1 is:

[0154] M1=E·W·ε 测 1 / A

[0155] Where M1 is the first dynamic bending moment value, E is the elastic modulus, W is the section modulus, and ε 测1 Let A be the first measured strain value, A be the bridge arm coefficient, which is taken as 2(1+υ), and υ be the Poisson's ratio of the elastic element being measured.

[0156] In this embodiment of the invention, by inputting the elastic modulus, the section modulus, the first measured strain value, and the bridge arm coefficient into Formula 1, the first dynamic bending moment value M1 for the first measured section is calculated, thereby realizing the automatic acquisition of the first dynamic bending moment value M1 and improving the acquisition efficiency of the first dynamic bending moment value.

[0157] In an optional embodiment of the present invention, the step of calculating the second dynamic bending moment value for the second measured section based on the elastic modulus, the section modulus, the second measured strain value, and the bridge arm coefficient includes:

[0158] The elastic modulus, the section modulus, the second measured strain value, and the bridge arm coefficient are input into Formula 2 to calculate the second dynamic bending moment value M2 for the second measured section. Formula 2 is as follows:

[0159] M2=E·W·ε 测 2 / A

[0160] Where M2 is the second dynamic bending moment value, E is the elastic modulus, W is the section modulus, and ε 测2 The second measured strain value is A, which is the bridge arm coefficient, taken as 2(1+υ), and υ is the Poisson's ratio of the elastic element being measured.

[0161] In this embodiment of the invention, by inputting the elastic modulus, the section modulus, the second measured strain value, and the bridge arm coefficient into Formula 2, the second dynamic bending moment value M2 for the second measured section is calculated, thereby realizing the automatic acquisition of the second dynamic bending moment value M2 and improving the acquisition efficiency of the second dynamic bending moment value.

[0162] Optionally, the output voltage of the signal transmission unit and the signal acquisition unit can be 2(1+υ) times. Because the symmetrical arrangement of the strain sensors in this technology has an averaging cancellation effect, it eliminates the influence of tensile and compressive deformation on bending deformation measurement, obtains accurate tower structure bending strain, thereby realizing large-range, high-precision stress and strain measurement and improving testing efficiency.

[0163] In an optional embodiment of the present invention, the step of calculating the shear force value for the offshore wind turbine tower based on the first dynamic bending moment value and the second dynamic bending moment value includes:

[0164] Determine the length of the offshore wind turbine tower;

[0165] The relationship between the bending moment changes of the first measuring section and the second measuring section is determined based on the first dynamic bending moment value and the second dynamic bending moment value;

[0166] The shear force value for the offshore wind turbine tower is calculated based on the length of the offshore wind turbine tower, the bending moment variation relationship, and the preset interval distance.

[0167] According to embodiments of the present invention, after determining the length of the offshore wind turbine tower, the shear force value for the offshore wind turbine tower can be calculated using the following formula.

[0168] Formula 3: Q=dM / dx;

[0169] Formula 4: dM = M1 - M2

[0170] Formula 5: d X =H;

[0171] in:

[0172] Q is the shear force;

[0173] M is the bending moment;

[0174] x is the length of the offshore wind turbine tower, which can be used as a variable;

[0175] M1 is the first dynamic bending moment value;

[0176] M2 is the bending moment at the second section;

[0177] H is the preset interval distance between the first and second measurement sections;

[0178] Formula 3, Q = dM / dx, is the fundamental equation for shear force, stating that shear force equals the rate of change of bending moment. Formula 3 demonstrates that shear force equals the first derivative of bending moment, and it can be derived from the force balance in small components of offshore wind turbine towers.

[0179] Formula 4, dM = M1 - M2, defines the change in bending moment between two sections, that is, the relationship between the change in bending moment between the first measuring section and the second measuring section. Formula 4 states that the change in bending moment is equal to the difference in bending moment at the two sections.

[0180] Formula 5, dx = H, defines the distance between two cross sections.

[0181] To use these equations to calculate shear force, we can substitute Equations 4 and 5 into Equation 3 to obtain Equation 6:

[0182] Q=dM / dx=(M1-M2) / dx=(M1-M2) / H

[0183] Therefore, the shear force is equal to the difference in bending moments at the two sections divided by the distance between the two sections.

[0184] As can be seen from the above, since shear force is responsible for resisting changes in bending moment, shear force is directly proportional to changes in bending moment and inversely proportional to the distance between cross sections.

[0185] In this embodiment of the invention, the length of the offshore wind turbine tower is determined; the bending moment variation relationship between the first and second measuring sections is determined based on the first and second dynamic bending moment values; and the shear force value for the offshore wind turbine tower is calculated based on the length of the offshore wind turbine tower, the bending moment variation relationship, and the preset interval distance. This achieves automatic calculation of the shear force value for the offshore wind turbine tower and improves the calculation efficiency of the shear force value for the offshore wind turbine tower.

[0186] In summary, the embodiments of this invention measure bending strain, considering the elimination of the influence of tensile and compressive deformation on bending deformation measurement, and saving the number of channels after the bridge is constructed; secondly, bending moment is calculated; and thirdly, shear force is calculated. It can measure the actual operating load of key sections such as the wind turbine tower in real time, specifically the horizontal shear force in two directions and the bending moment in two directions. For offshore wind turbines, measuring the maximum load borne by the wind turbine tower is of great significance for the optimized design and simulation model verification of the wind turbine under various operating conditions.

[0187] It should be noted that, for the sake of simplicity, the method embodiments are all described as a series of actions. However, those skilled in the art should understand that the embodiments of the present invention are not limited to the described order of actions, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.

[0188] Reference Figure 7 The diagram shows a structural block diagram of a testing system for bending moment and shear force of offshore wind turbine components provided in an embodiment of the present invention, which may specifically include the following modules:

[0189] The measurement section determination module 701 is used to determine a first measurement section and a second measurement section for the offshore wind turbine tower at preset intervals. The testing system for bending moment and shear force of the offshore wind turbine component is configured with at least two sets of strain value acquisition units for the first measurement section and the second measurement section. The strain value acquisition unit includes a first strain gauge and a second strain gauge for the horizontal direction, and a third strain gauge and a fourth strain gauge for the vertical direction. The first strain gauge and the fourth strain gauge are arranged adjacently and vertically to form a first strain gauge group, and the second strain gauge and the third strain gauge are arranged adjacently and vertically to form a second strain gauge group. The first strain gauge group and the second strain gauge group are respectively arranged on both sides of the offshore wind turbine tower, forming a set of strain value acquisition units.

[0190] The arm coefficient determination module 702 is used to determine the arm coefficient for the offshore wind turbine tower.

[0191] Material parameter module 703 is used to determine the elastic modulus and section modulus of the offshore wind turbine tower.

[0192] The strain value acquisition module 704 is used to acquire a first strain value for the first measurement section using the strain value acquisition unit for the first measurement section, and to acquire a second strain value for the second measurement section using the strain value acquisition unit for the second measurement section.

[0193] The first dynamic bending moment calculation module 705 is used to calculate the first dynamic bending moment value for the first measured section based on the elastic modulus, the section modulus, the first measured strain value and the bridge arm coefficient.

[0194] The second dynamic bending moment calculation module 706 is used to calculate the second dynamic bending moment value for the second measured section based on the elastic modulus, the section modulus, the second measured strain value and the bridge arm coefficient.

[0195] The shear force calculation module 707 is used to calculate the shear force value for the offshore wind turbine tower based on the first dynamic bending moment value and the second dynamic bending moment value.

[0196] As the system implementation is basically similar to the method implementation, it is described in a relatively simple way. For relevant details, please refer to the description of the method implementation.

[0197] In addition, this invention also provides an electronic device, including: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, it implements the various processes of the above-described test method embodiment for bending moment and shear force of offshore wind power components and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0198] This invention also provides a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the various processes of the above-described method for testing the bending moment and shear force of offshore wind turbine components, achieving the same technical effects. To avoid repetition, these details are not repeated here. The computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0199] Figure 8 A schematic diagram of the hardware structure of an electronic device for implementing various embodiments of the present invention.

[0200] The electronic device 800 includes, but is not limited to, components such as: a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809, a processor 810, and a power supply 811. Those skilled in the art will understand that... Figure 8 The electronic device structures shown are not intended to limit the electronic device. An electronic device may include more or fewer components than shown, or combine certain components, or have different component arrangements. In embodiments of the present invention, the electronic device includes, but is not limited to, mobile phones, tablet computers, laptops, PDAs, in-vehicle terminals, wearable devices, and pedometers.

[0201] It should be understood that, in this embodiment of the invention, the radio frequency unit 801 can be used for receiving and transmitting signals during information transmission or calls. Specifically, it receives downlink data from the base station and processes it with the processor 810; additionally, it transmits uplink data to the base station. Typically, the radio frequency unit 801 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc. Furthermore, the radio frequency unit 801 can also communicate with networks and other devices through a wireless communication system.

[0202] Electronic devices provide users with wireless broadband internet access through network module 802, such as helping users send and receive emails, browse web pages, and access streaming media.

[0203] The audio output unit 803 can convert audio data received by the radio frequency unit 801 or the network module 802 or stored in the memory 809 into audio signals and output them as sound. Furthermore, the audio output unit 803 can also provide audio output related to specific functions performed by the electronic device 800 (e.g., call signal reception sound, message reception sound, etc.). The audio output unit 803 includes a speaker, a buzzer, and a receiver, etc.

[0204] Input unit 804 is used to receive audio or video signals. Input unit 804 may include a graphics processing unit (GPU) 8041 and a microphone 8042. The GPU 8041 processes image data of still images or videos acquired by an image capture device (such as a camera) in video capture mode or image capture mode. The processed image frames can be displayed on display unit 806. The image frames processed by GPU 8041 can be stored in memory 809 (or other storage medium) or transmitted via radio frequency unit 801 or network module 802. Microphone 8042 can receive sound and process such sound into audio data. The processed audio data can be converted into a format that can be transmitted to a mobile communication base station via radio frequency unit 801 in telephone call mode.

[0205] The electronic device 800 also includes at least one sensor 805, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor. The ambient light sensor can adjust the brightness of the display panel 8061 according to the ambient light level, and the proximity sensor can turn off the display panel 8061 and / or backlight when the electronic device 800 is moved to the ear. As a type of motion sensor, an accelerometer sensor can detect the magnitude of acceleration in various directions (generally three axes). When stationary, it can detect the magnitude and direction of gravity and can be used to identify the posture of the electronic device (such as landscape / portrait switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc. The sensor 805 may also include a fingerprint sensor, pressure sensor, iris sensor, molecular sensor, gyroscope, barometer, hygrometer, thermometer, infrared sensor, etc., which will not be described in detail here.

[0206] The display unit 806 is used to display information input by the user or information provided to the user. The display unit 806 may include a display panel 8061, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

[0207] User input unit 807 can be used to receive input numerical or character information, and to generate key signal inputs related to user settings and function control of electronic devices. Specifically, user input unit 807 includes a touch panel 8071 and other input devices 8072. Touch panel 8071, also known as a touch screen, can collect touch operations performed by the user on or near it (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near touch panel 8071). Touch panel 8071 may include two parts: a touch detection device and a touch controller. The touch detection device detects the user's touch position and the signal generated by the touch operation, and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends it to the processor 810, which receives and executes commands from the processor 810. In addition, touch panel 8071 can be implemented using various types such as resistive, capacitive, infrared, and surface acoustic wave. Besides touch panel 8071, user input unit 807 may also include other input devices 8072. Specifically, other input devices 8072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, joysticks, etc., which will not be described in detail here.

[0208] Furthermore, the touch panel 8071 can cover the display panel 8061. When the touch panel 8071 detects a touch operation on or near it, it transmits the information to the processor 810 to determine the type of touch event. Subsequently, the processor 810 provides corresponding visual output on the display panel 8061 based on the type of touch event. Although in Figure 8 In this embodiment, the touch panel 8071 and the display panel 8061 are two independent components to realize the input and output functions of the electronic device. However, in some embodiments, the touch panel 8071 and the display panel 8061 can be integrated to realize the input and output functions of the electronic device. The specific implementation is not limited here.

[0209] Interface unit 808 serves as an interface for connecting external devices to electronic device 800. For example, external devices may include a wired or wireless headphone port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input / output (I / O) port, a video I / O port, a headphone port, and so on. Interface unit 808 can be used to receive input from external devices (e.g., data, power, etc.) and transmit the received input to one or more components within electronic device 800, or it can be used to transmit data between electronic device 800 and external devices.

[0210] The memory 809 can be used to store software programs and various data. The memory 809 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, applications required for at least one function (such as sound playback, image playback, etc.), etc.; the data storage area may store data created based on the use of the mobile phone (such as audio data, phonebook, etc.). Furthermore, the memory 809 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0211] The processor 810 is the control center of the electronic device. It connects various parts of the electronic device via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 809, and by calling data stored in the memory 809, it performs various functions and processes data, thereby providing overall monitoring of the electronic device. The processor 810 may include one or more processing units; preferably, the processor 810 may integrate an application processor and a modem processor. The application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 810.

[0212] The electronic device 800 may also include a power supply 811 (such as a battery) for supplying power to various components. Preferably, the power supply 811 is logically connected to the processor 810 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system.

[0213] In addition, the electronic device 800 includes some functional modules not shown, which will not be described in detail here.

[0214] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0215] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0216] like Figure 9 As shown, in another embodiment of the present invention, a computer-readable storage medium 901 is also provided, which stores instructions that, when executed on a computer, cause the computer to perform the method for testing the bending moment and shear force of offshore wind power components as described in the above embodiment.

[0217] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other modifications under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these modifications are within the protection scope of the present invention.

[0218] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed in this invention can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0219] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0220] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0221] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0222] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0223] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0224] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for testing the bending moment and shear force of offshore wind turbine components, characterized in that, The method is applied to a testing system for bending moment and shear force of offshore wind turbine components, which at least include an offshore wind turbine tower, comprising: The first and second measurement sections of the offshore wind turbine tower are determined according to a preset interval distance; the testing system for bending moment and shear force of the offshore wind turbine component is equipped with at least two sets of strain value acquisition units for the first and second measurement sections. The strain value acquisition unit includes a first strain gauge and a second strain gauge for the horizontal direction, and a third strain gauge and a fourth strain gauge for the vertical direction; the first strain gauge and the fourth strain gauge are arranged adjacently and vertically to form a first strain gauge group, and the second strain gauge and the third strain gauge are arranged adjacently and vertically to form a second strain gauge group. The first strain gauge group and the second strain gauge group are respectively arranged on both sides of the offshore wind turbine tower, forming a set of strain value acquisition units; Determine the bridge arm coefficient for the aforementioned offshore wind turbine tower; Determine the elastic modulus and section modulus of the offshore wind turbine tower; A strain value acquisition unit for the first measurement section is used to acquire a first measured strain value for the first measurement section, and a strain value acquisition unit for the second measurement section is used to acquire a second measured strain value for the second measurement section. Based on the elastic modulus, the section modulus, the first measured strain value, and the bridge arm coefficient, calculate the first dynamic bending moment value for the first measured section. Based on the elastic modulus, the section modulus, the second measured strain value, and the bridge arm coefficient, calculate the second dynamic bending moment value for the second measured section; The shear force value for the offshore wind turbine tower is calculated based on the first dynamic bending moment value and the second dynamic bending moment value.

2. The method according to claim 1, characterized in that, Multiple strain value acquisition units are arranged on the same vertical line, and the arrangement direction of the strain value acquisition units is determined based on the bending direction of the offshore wind turbine tower.

3. The method according to claim 1, characterized in that, The step of calculating the first dynamic bending moment value for the first measured section based on the elastic modulus, the section modulus, the first measured strain value, and the bridge arm coefficient includes: The elastic modulus, the section modulus, the first measured strain value, and the bridge arm coefficient are input into Formula 1 to calculate the first dynamic bending moment value for the first measured section. Formula 1 is as follows: M1=E·W·ε 测1 / A Where M1 is the first dynamic bending moment value, E is the elastic modulus, W is the section modulus, and ε 测1 Let A be the first measured strain value, and let A be the bridge arm coefficient.

4. The method according to claim 3, characterized in that, The step of calculating the second dynamic bending moment value for the second measured section based on the elastic modulus, the section modulus, the second measured strain value, and the bridge arm coefficient includes: The elastic modulus, the section modulus, the second measured strain value, and the bridge arm coefficient are input into Formula 2 to calculate the second dynamic bending moment value for the second measured section. Formula 2 is as follows: M2=E·W·ε 测2 / A Where M2 is the second dynamic bending moment value, E is the elastic modulus, W is the section modulus, and ε 测2 The second measured strain value is denoted as A, and the bridge arm coefficient is denoted as A.

5. The method according to claim 4, characterized in that, The step of calculating the shear force value for the offshore wind turbine tower based on the first dynamic bending moment value and the second dynamic bending moment value includes: Determine the length of the offshore wind turbine tower; The relationship between the bending moment changes of the first measuring section and the second measuring section is determined based on the first dynamic bending moment value and the second dynamic bending moment value; The shear force value for the offshore wind turbine tower is calculated based on the length of the offshore wind turbine tower, the bending moment variation relationship, and the preset interval distance.

6. The method according to claim 1, characterized in that, The strain value acquisition unit is configured with a first welding terminal for the first strain gauge group and a second welding terminal for the second strain gauge group; the first welding terminal and the second welding terminal are used for signal transmission. The testing system for bending moment and shear force of the offshore wind turbine components includes a third welded terminal for acquiring signals; The wiring terminals of the first strain gauge assembly are connected to the welding points of the third welding terminal via the first welding terminal; The wiring terminals of the second strain gauge assembly are connected to the welding points of the third welding terminal via the second welding terminal.

7. The method according to claim 6, characterized in that, The terminals of the first strain gauge group are sequentially connected to the first welding pins of the first welding terminal, and the terminals of the multiple first strain gauge groups correspond one-to-one with the multiple first welding pins. The terminals of the second strain gauge group are sequentially connected to the second welding pins of the second welding terminal, and the terminals of the multiple second strain gauge groups correspond one-to-one with the multiple second welding pins; The first terminal of the first strain gauge and the first terminal of the fourth strain gauge are connected to the first welding point of the third welding terminal through the first welding pin; The second terminal of the first strain gauge is connected to the third welding point of the third welding terminal via the first welding pin; The second connector of the second strain gauge is connected to the third welding point of the third welding terminal via the second welding pin; The first terminal of the second strain gauge and the second terminal of the third strain gauge are connected to the fourth welding point of the third welding terminal through the second welding pin; The first connector of the third strain gauge is connected to the second welding point of the third welding terminal via the second welding pin; The second connector of the fourth strain gauge is connected to the second welding point of the third welding terminal via the first welding pin.

8. A testing system for bending moment and shear force of offshore wind turbine components, characterized in that, The offshore wind power components include at least an offshore wind power tower, including: The measurement section determination module is used to determine a first measurement section and a second measurement section for the offshore wind turbine tower at preset intervals. The testing system for bending moment and shear force of the offshore wind turbine component is equipped with at least two sets of strain value acquisition units for the first measurement section and the second measurement section. The strain value acquisition unit includes a first strain gauge and a second strain gauge for the horizontal direction, and a third strain gauge and a fourth strain gauge for the vertical direction. The first strain gauge and the fourth strain gauge are arranged adjacently and vertically to form a first strain gauge group, and the second strain gauge and the third strain gauge are arranged adjacently and vertically to form a second strain gauge group. The first strain gauge group and the second strain gauge group are respectively arranged on both sides of the offshore wind turbine tower, forming a set of strain value acquisition units. The arm coefficient determination module is used to determine the arm coefficient for the offshore wind turbine tower. The material parameter module is used to determine the elastic modulus and section modulus of the offshore wind turbine tower. The strain value acquisition module is used to acquire a first strain value for the first measurement section using the strain value acquisition unit for the first measurement section, and to acquire a second strain value for the second measurement section using the strain value acquisition unit for the second measurement section; The first dynamic bending moment calculation module is used to calculate the first dynamic bending moment value for the first measured section based on the elastic modulus, the section modulus, the first measured strain value and the bridge arm coefficient. The second dynamic bending moment calculation module is used to calculate the second dynamic bending moment value for the second measured section based on the elastic modulus, the section modulus, the second measured strain value and the bridge arm coefficient. The shear force calculation module is used to calculate the shear force value for the offshore wind turbine tower based on the first dynamic bending moment value and the second dynamic bending moment value.

9. The system according to claim 8, characterized in that, Multiple strain value acquisition units are arranged on the same vertical line, and the arrangement direction of the strain value acquisition units is determined based on the bending direction of the offshore wind turbine tower.

10. The system according to claim 8, characterized in that, The first dynamic bending moment calculation module is also used for: The elastic modulus, the section modulus, the first measured strain value, and the bridge arm coefficient are input into Formula 1 to calculate the first dynamic bending moment value for the first measured section. Formula 1 is as follows: M1=E·W·ε 测1 / A Where M1 is the first dynamic bending moment value, E is the elastic modulus, W is the section modulus, and ε 测1 Let A be the first measured strain value, and let A be the bridge arm coefficient.

11. The system according to claim 10, characterized in that, The second dynamic bending moment calculation module is also used for: The elastic modulus, the section modulus, the second measured strain value, and the bridge arm coefficient are input into Formula 2 to calculate the second dynamic bending moment value for the second measured section. Formula 2 is as follows: M2=E·W·ε 测2 / A Where M2 is the second dynamic bending moment value, E is the elastic modulus, W is the section modulus, and ε 测2 The second measured strain value is denoted as A, and the bridge arm coefficient is denoted as A.

12. The system according to claim 11, characterized in that, The shear force calculation module is also used for: Determine the length of the offshore wind turbine tower; The relationship between the bending moment changes of the first measuring section and the second measuring section is determined based on the first dynamic bending moment value and the second dynamic bending moment value; The shear force value for the offshore wind turbine tower is calculated based on the length of the offshore wind turbine tower, the bending moment variation relationship, and the preset interval distance.

13. The system according to claim 8, characterized in that, The strain value acquisition unit is configured with a first welding terminal for the first strain gauge group and a second welding terminal for the second strain gauge group; the first welding terminal and the second welding terminal are used for signal transmission. The testing system for bending moment and shear force of the offshore wind turbine components includes a third welded terminal for acquiring signals; The wiring terminals of the first strain gauge assembly are connected to the welding points of the third welding terminal via the first welding terminal; The wiring terminals of the second strain gauge assembly are connected to the welding points of the third welding terminal via the second welding terminal.

14. An electronic device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; The memory is used to store computer programs; When the processor executes a program stored in the memory, it implements the method as described in any one of claims 1-7.

15. A computer-readable storage medium having instructions stored thereon that, when executed by one or more processors, cause the processors to perform the method as described in any one of claims 1-7.

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