Method and system for testing bending moment and shearing force of offshore wind power component

Abstract

The embodiment of the invention provides a method and a system for testing the bending moment and the shearing force of an offshore wind power component. The method comprises the following steps: taking a first measurement strain value aiming at a first measurement section and a second measurement strain value aiming at a second measurement section; calculating a first dynamic bending moment value for the first measurement section based on the elastic modulus, the section resistance moment, the first measurement strain value and the bridge arm coefficient; calculating a second dynamic bending moment value for the second measurement section based on the elastic modulus, the section resistance moment, the second measurement strain value and the bridge arm coefficient; and the shearing force value for the offshore wind power tower drum is calculated based on the first dynamic bending moment value and the second dynamic bending moment value, so that the bending moment and the shearing force load of the offshore wind power tower drum are tested, and the design efficiency of the offshore wind power tower drum is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of testing bending moment and shear force of offshore wind power components, and in particular to a method for testing bending moment and shear force of offshore wind power components, a system for testing bending moment and shear force of offshore wind power components, an electronic device and a computer-readable storage medium. Background Art

[0002] The offshore wind turbine tower serves as a load transfer structure between the wind turbine foundation and the upper tower. In real marine environments, the upper load of the wind turbine is transferred to the tower, and then to the jacket foundation through the tower. Therefore, the actual load capacity of the connection between the jacket and the tower is crucial to the design. Summary of the invention

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

[0004] The embodiment of the present invention discloses a method for testing bending moment and shear force of an offshore wind power component. The method is applied to a testing system for bending moment and shear force of an offshore wind power component. The offshore wind power component at least includes an offshore wind power tower, including:

[0005] The first measurement section and the second measurement section for the offshore wind power tower are determined according to a preset spacing distance; the testing system for the bending moment and shear force of the offshore wind power component is configured with at least two groups of strain value acquisition units for the first measurement section and the second measurement section, and 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 adjacent to each other and arranged vertically as a first strain gauge group, the second strain gauge and the third strain gauge are adjacent to each other and arranged vertically as a second strain gauge group, and the first strain gauge group and the second strain gauge group are respectively arranged on both sides of the offshore wind power tower to form a group of strain value acquisition units;

[0006] Determining a bridge arm coefficient for the offshore wind turbine tower;

[0007] Determining a tower elastic modulus and a section resistance moment for the offshore wind power tower;

[0008] Using the strain value acquisition unit for the first measurement section to acquire a first measurement strain value for the first measurement section, and using the strain value acquisition unit for the second measurement section to acquire a second measurement strain value for the second measurement section;

[0009] Calculating a first dynamic bending moment value for the first measurement section based on the elastic modulus, the section resistance moment, the first measured strain value, and the bridge arm coefficient;

[0010] Calculating a second dynamic bending moment value for the second measurement section based on the elastic modulus, the section resistance moment, the second measured strain value, and the bridge arm coefficient;

[0011] A 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, a plurality of groups of the 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 a first dynamic bending moment value for the first measurement section based on the elastic modulus, the section resistance moment, the first measured strain value and the bridge arm coefficient comprises:

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

[0015] M1=E·W·ε 测 1 / A

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

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

[0018] The elastic modulus, the section resistance moment, 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. The Formula 2 is:

[0019] M2=E·W·ε 测 2 / A

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

[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 comprises:

[0022] Determining the length of the offshore wind power tower;

[0023] Determine a bending moment change relationship between the first measurement section and the second measurement section based on the first dynamic bending moment value and the second dynamic bending moment value;

[0024] The shear force value for the offshore wind power tower is calculated based on the length of the offshore wind power tower, the bending moment variation relationship and the preset spacing 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 to transmit signals;

[0026] The testing system for bending moment and shear force of offshore wind power components comprises a third welding terminal for collecting signals;

[0027] The terminal of the first strain gauge group is connected to the welding point of the first welding terminal and the third welding terminal through the welding point of the first welding terminal;

[0028] The terminal of the second strain gauge group is connected to a welding point of the second welding terminal and the third welding terminal through the welding point of the second welding terminal.

[0029] Optionally, the wiring heads of the first strain gauge group are sequentially connected to the first welding pins of the first welding terminal, and a plurality of wiring heads of the first strain gauge group correspond to a plurality of the first welding pins one by one;

[0030] The wiring heads of the second strain gauge group are sequentially connected to the second welding pins of the second welding terminal, and the wiring heads of the second strain gauge group correspond to the second welding pins one by one;

[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 terminal of the second strain gauge is connected to the third welding point of the third welding terminal through 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 a fourth welding point of the third welding terminal through the second welding pin;

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

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

[0037] The embodiment of the present invention further discloses a testing system for bending moment and shear force of an offshore wind power component, wherein the offshore wind power component at least includes an offshore wind power tower, including:

[0038] A measurement section determination module, used to determine a first measurement section and a second measurement section for the offshore wind power tower according to a preset interval; the testing system for bending moment and shear force of the offshore wind power component is configured with at least two groups of strain value acquisition units for the first measurement section and the second measurement section, and 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 adjacent to each other and arranged vertically as a first strain gauge group, the second strain gauge and the third strain gauge are adjacent to each other and arranged vertically as a second strain gauge group, and the first strain gauge group and the second strain gauge group are respectively arranged on both sides of the offshore wind power tower to form a group of strain value acquisition units;

[0039] A bridge arm coefficient determination module, used to determine the bridge arm coefficient for the offshore wind power tower;

[0040] A material parameter module, used to determine the tower elastic modulus and section resistance moment of the offshore wind power tower;

[0041] a measured strain value acquisition module, configured to acquire a first measured strain value for the first measurement section by using a strain value acquisition unit for the first measurement section, and to acquire a second measured strain value for the second measurement section by using a strain value acquisition unit for the second measurement section;

[0042] A first dynamic bending moment value calculation module, used for calculating a first dynamic bending moment value for the first measurement section based on the elastic modulus, the section resistance moment, the first measured strain value and the bridge arm coefficient;

[0043] A second dynamic bending moment value calculation module, used for calculating a second dynamic bending moment value for the second measurement section based on the elastic modulus, the section resistance moment, the second measured strain value and the bridge arm coefficient;

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

[0045] Optionally, a plurality of groups of the 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 value calculation module is further used for:

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

[0048] M1=E·W·ε 测1 / A

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

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

[0051] The elastic modulus, the section resistance moment, 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. The Formula 2 is:

[0052] M2=E·W·ε 测2 / A

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

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

[0055] Determining the length of the offshore wind power tower;

[0056] Determine a bending moment change relationship between the first measurement section and the second measurement section based on the first dynamic bending moment value and the second dynamic bending moment value;

[0057] The shear force value for the offshore wind power tower is calculated based on the length of the offshore wind power tower, the bending moment variation relationship and the preset spacing 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 to transmit signals;

[0059] The testing system for bending moment and shear force of offshore wind power components comprises a third welding terminal for collecting signals;

[0060] The terminal of the first strain gauge group is connected to the welding point of the first welding terminal and the third welding terminal through the welding point of the first welding terminal;

[0061] The terminal of the second strain gauge group is connected to the welding point of the third welding terminal through the second welding terminal

[0062] The embodiment of the present invention further discloses an electronic device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;

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

[0064] The processor is used to implement the method described in the embodiment of the present invention when executing the program stored in the memory.

[0065] The embodiment of the present invention further discloses a computer-readable storage medium having instructions stored thereon, which, when executed by one or more processors, enables the processors to execute the method described in the embodiment of the present invention.

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

[0067] According to an embodiment of the present invention, a first measurement section and a second measurement section for the offshore wind turbine tower are determined at a preset interval; a bridge arm coefficient for the offshore wind turbine tower is determined; a tower elastic modulus and a section resistance moment for the offshore wind turbine tower are determined; a strain value acquisition unit for the first measurement section is used to acquire a first measurement strain value for the first measurement section, and a strain value acquisition unit for the second measurement section is used to acquire a second measurement strain value for the second measurement section; a first dynamic bending moment value for the first measurement section is calculated based on the elastic modulus, the section resistance moment, the first measurement strain value and the bridge arm coefficient; a second dynamic bending moment value for the second measurement section is calculated based on the elastic modulus, the section resistance moment, the second measurement strain value and the bridge arm coefficient; and a 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, thereby realizing the testing of the bending moment and shear load of 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, parallel to and perpendicular to the main wind direction of the wind farm during bending moment measurement, the bending moments in two directions can be obtained respectively. If strain value acquisition units are arranged on the first measurement section and the second measurement section respectively, the horizontal shear forces in two directions can be obtained, thereby improving the test efficiency of the bending moment and shear load of the offshore wind turbine tower.

[0069] Furthermore, through the wiring method as described above, when the strain value acquisition unit generates a signal for characterizing the horizontal shear force in two directions, signal transmission and signal acquisition are effectively realized, thereby improving the test efficiency of the bending moment and shear load of the offshore wind power tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 It is a flow chart of the steps of a method for testing the bending moment and shear force of an offshore wind power component provided in an embodiment of the present invention;

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

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

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

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

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

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

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

[0078] Fig. 9 is a schematic diagram of a computer-readable medium provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0079] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is 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 material mechanics, which have a significant impact on the stress state and deformation of components.

[0081] Bending moment refers to the moment that causes a member to bend. Its magnitude is equal to the force acting on the member multiplied by the vertical distance from the force to the member's fulcrum. Bending moment will cause the member to bend and deform. The greater the bending moment, the greater the deformation.

[0082] Shear force refers to the internal force perpendicular to the axis of the component. Its magnitude is equal to the lateral component of all external forces acting on the cross section of the component. Shear force will cause shear deformation of the component. The greater the shear force, the greater the deformation.

[0083] The bending moment and shear force act as follows:

[0084] Bending moment will cause bending deformation of the component. The greater the bending moment, the greater the deformation. Bending deformation will cause stress in the cross section of the component. When the stress is too large, it will cause the component to break. Therefore, when designing components, it is necessary to consider the impact of bending moment on the component and take measures to improve the bending resistance of the component.

[0085] Shear force will cause shear deformation of the component. The greater the shear force, the greater the deformation. Shear deformation will cause shear stress in the cross section of the component. When the shear stress is too large, it will cause the component to shear and fracture. Therefore, when designing components, it is necessary to consider the impact of shear force on the components and take measures to improve the shear resistance of the components.

[0086] Bending moment and shear force are interrelated. In most cases, bending moment and shear force will act on the member at the same time. Bending moment will cause shear force, and shear force will also cause bending moment. Therefore, when analyzing the stress state of a member, it is necessary to consider the effects of bending moment and shear force at the same time.

[0087] In a specific implementation, the method for calculating bending moment and shear force involved in the embodiment of the present invention may include:

[0088] Section method: Section method is one of the most commonly used methods for analyzing the stress state of a component. It obtains bending moment and shear force by analyzing the internal force balance of the component section.

[0089] Differential method: Differential method is a method to obtain bending moment and shear force based on mechanical equilibrium equation. It needs to find out the load distribution on the component first, and then use the mechanical equilibrium equation to obtain 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 units, and then obtains the bending moment and shear force of the entire component by solving the mechanical equilibrium equations of the units.

[0091] In actual engineering, appropriate calculation methods can be selected according to specific circumstances to obtain bending moment and shear force.

[0092] Applications related to bending moments and shear forces 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 parts.

[0095] Materials Science: In materials science, researchers study the ability of materials to resist bending and shear, which is important for developing new materials and improving material properties.

[0096] Bending moment and shear force are two important concepts in material mechanics, which have a significant impact on the stress state and deformation of components. In engineering practice, bending moment and shear force are widely used.

[0097] Reference Figure 1 , shows a flow chart of the steps of a method for testing the bending moment and shear force of an offshore wind power component provided in an embodiment of the present invention, which may specifically include the following steps:

[0098] Step S1, determining a first measurement section and a second measurement section for the offshore wind turbine tower according to a preset interval;

[0099] Step S2, determining a bridge arm coefficient for the offshore wind power tower;

[0100] Step S3, determining the tower elastic modulus and section resistance moment of the offshore wind power tower;

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

[0102] Step S5, calculating a first dynamic bending moment value for the first measurement section based on the elastic modulus, the section resistance moment, the first measured strain value and the bridge arm coefficient;

[0103] Step S6, calculating a second dynamic bending moment value for the second measurement section based on the elastic modulus, the section resistance moment, the second measurement strain value and the bridge arm coefficient;

[0104] Step S7: calculating a 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 a specific implementation, the embodiment of the present invention can be applied to a test system for bending moment and shear force of offshore wind power components, which can include a strain gauge for obtaining strain values, as well as a signal transmission unit, a signal acquisition unit, and a data processing device. Optionally, the method can also be applied to a test system for bending moment and shear force load of components with circular cross-sections such as blade roots and steel pipe piles.

[0106] In practical applications, bending moment and shear force are forces acting inside a component, and they cannot be measured directly. Therefore, it is necessary to calculate the bending moment and shear force by analyzing the internal force balance of the component section. Consider a component with a known stress state, and take two sections on any section. The two sections can be regarded as separate mechanical systems. For these two mechanical systems, the moment balance and shear force balance equations can be established respectively. These two equations are independent because they are obtained from different sections.

[0107] The offshore wind power components of the embodiments of the present invention include at least an offshore wind power tower. The first measurement section and the second measurement section for the offshore wind power tower can be determined according to a preset interval distance. By way of example, the section to be measured first is determined as the first measurement section, and the second measurement section is positioned 50 cm upward from the first measurement section (the distance can be a long integer degree for convenient measurement). Preferably, an integer distance is selected between the first measurement section and the second measurement section.

[0108] Of course, the above examples are only for illustration, and those skilled in the art may adopt any distance as the preset spacing distance, which is not limited in the embodiments of the present invention.

[0109] After determining the first measurement section and the second measurement section, the arm coefficient and material parameters of the offshore wind power tower in the strain value extraction unit layout scheme can be determined, and the material parameters at least include the elastic modulus and section resistance moment of the tower.

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

[0111] The bridge arm coefficient refers to the ratio of the distance from the center of gravity of the tower section to the neutral axis to the section resistance moment. It is a dimensionless quantity. The bridge arm coefficient reflects the influence of the cross-sectional shape on the moment resistance. The larger the bridge arm coefficient, the greater the resistance of the cross-sectional shape to the 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 ability to resist deformation.

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

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

[0115] By respectively using a strain value acquisition unit for the first measurement section to acquire a first measurement strain value for the first measurement section, and using a strain value acquisition unit for the second measurement section to acquire a second measurement strain value for the second measurement section, the strain value data of different sections are separately acquired, thereby improving the collection accuracy of the strain values.

[0116] After obtaining the first measured strain value for the first measuring section and the second measured strain value for the second measuring section through the strain gauge, the embodiment of the present invention can calculate the first dynamic bending moment value for the first measuring section and the second dynamic bending moment value for the second measuring section based on the elastic modulus, the section resistance moment, the first measured strain value, the second measured strain value and the bridge arm coefficient, and can also 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, thereby realizing the testing of the 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 power components of an embodiment of the present invention is configured with at least two groups of strain value acquisition units for a first measuring section and a second measuring section, and the strain value acquisition units include a first strain gauge and a second strain gauge for a horizontal direction, and a third strain gauge and a fourth strain gauge for a vertical direction; wherein the first strain gauge and the fourth strain gauge are adjacent and vertically arranged as a first strain gauge group, and the second strain gauge and the third strain gauge are adjacent and vertically arranged as a second strain gauge group, and the first strain gauge group and the second strain gauge group are respectively arranged on both sides of the offshore wind power tower, constituting a group of strain value acquisition units.

[0118] Optionally, a plurality of groups of the 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 Figure 2-Figure 4 , Figure 2 is a structural schematic diagram of a strain value acquisition unit provided in an embodiment of the present invention; Figure 3 is a schematic structural diagram of another strain value acquisition unit provided in an embodiment of the present invention; Figure 4It is a schematic diagram of a top view of the structure of a strain value acquisition unit provided in an embodiment of the present invention.

[0120] The section to be measured is determined as the first measurement section, and 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 perpendicular to and adjacent to the fourth strain gauge 104 in the installation direction, the second strain gauge 102 is perpendicular to and adjacent to the third strain gauge 103 in the installation direction, the first strain gauge 101 and the fourth strain gauge 104 constitute a first strain gauge group, the second strain gauge 102 and the third strain gauge 103 constitute a second strain gauge group, the first strain gauge group and the second strain gauge group constitute a group of strain value acquisition units, which are positioned 50 cmm upward from the first measurement section (the distance can be a long integer degree convenient for measurement) as the second measurement section, the first measurement section and the second measurement section are spaced at an integer distance, the strain value acquisition units are installed at the first measurement section and the second measurement section respectively, and the installation direction of the strain value acquisition unit can be determined along 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 based on the main wind direction of the wind farm throughout the year.

[0122] The first strain gauge group and the second strain gauge group can be arranged in multiple groups symmetrically and evenly spaced along the first measuring section or the second measuring section 360 degrees as needed to obtain bending moments and shear forces 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 to transmit signals;

[0124] The testing system for bending moment and shear force of offshore wind power components comprises a third welding terminal for collecting signals;

[0125] The terminal of the first strain gauge group is connected to the welding point of the first welding terminal and the third welding terminal through the welding point of the first welding terminal;

[0126] The terminal of the second strain gauge group is connected to the welding point of the third welding terminal through the second welding terminal;

[0127] The wiring heads of the first strain gauge group are connected to the first welding pins of the first welding terminal in sequence, and the wiring heads of the first strain gauge group correspond to the first welding pins one by one;

[0128] The wiring heads of the second strain gauge group are sequentially connected to the second welding pins of the second welding terminal, and the wiring heads of the second strain gauge group correspond to the second welding pins one by one;

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

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

[0135] In a specific implementation, the embodiment of the present invention can first grind the inner wall of the tower until the silver steel body is exposed, and the grinding range is more than twice the area of ​​the strain gauge. Then, a polishing machine is used to polish the steel surface to facilitate the strain gauge to fit tightly. According to the installation plan, a steel needle is used to mark and locate the position, and it is cleaned with alcohol. Then, the strain gauges are glued to the inner wall of the tower in turn, and the corresponding welding terminals are installed based on the number of strain gauges. Finally, the surface of the strain gauge is protected to prevent the strain gauge from being damaged, and the installation work is completed.

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

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

[0138] Each strain gauge in the first strain gauge group has two terminals. The number of the terminals in the first strain gauge group is the same as the number of the first welding pins, and they are in a one-to-one correspondence. The first strain gauge 101 and each terminal of the fourth strain gauge 104 are connected to the first welding pin 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 the terminals in the second strain gauge group is the same as the number of the 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] Connecting the first terminal of the first strain gauge 101 and the first terminal of the fourth strain gauge 104 to the first welding point 304 of the third welding terminal 303 through wires;

[0141] Connect the second terminal of the first strain gauge 101 and the second terminal of the second strain gauge 102 to the third welding point 306 of the third welding terminal 303 through wires;

[0142] Connecting the first terminal of the second strain gauge 102 and the second terminal of the third strain gauge 103 to the fourth welding point 307 of the third welding terminal 303 through wires;

[0143] The first terminal of the third strain gauge 103 and the second terminal of the fourth strain gauge 104 are connected to the second welding point 305 of the third welding terminal 303 through wires. At this point, the line connection of the strain sensor is completed.

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

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

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

[0147] For the 6-wire system, the first welding point of the third welding terminal 303 is connected to two wires, which are respectively connected to the positive excitation voltage and the positive sensing lead of the collector, the second welding point 305 is connected to one wire, which is connected to the positive signal of the collector, the third welding point 306 is connected to two wires, which are respectively connected to the negative excitation voltage and the negative sensing lead of the collector, and the fourth welding point 307 is connected to one wire, which is connected to the negative signal of the collector.

[0148] According to an embodiment of the present invention, a first measurement section and a second measurement section for the offshore wind turbine tower are determined at a preset interval; a bridge arm coefficient for the offshore wind turbine tower is determined; a tower elastic modulus and a section resistance moment for the offshore wind turbine tower are determined; a strain value acquisition unit for the first measurement section is used to acquire a first measurement strain value for the first measurement section, and a strain value acquisition unit for the second measurement section is used to acquire a second measurement strain value for the second measurement section; a first dynamic bending moment value for the first measurement section is calculated based on the elastic modulus, the section resistance moment, the first measurement strain value, and the bridge arm coefficient; a second dynamic bending moment value for the second measurement section is calculated based on the elastic modulus, the section resistance moment, the second measurement strain value, and the bridge arm coefficient; and a 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, thereby realizing the testing of the bending moment and shear load of 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, parallel to and perpendicular to the main wind direction of the wind farm during bending moment measurement, the bending moments in two directions can be obtained respectively. If strain value acquisition units are arranged on the first measurement section and the second measurement section respectively, the horizontal shear forces in two directions can be obtained, thereby improving the test efficiency of the bending moment and shear load of the offshore wind turbine tower.

[0150] Furthermore, through the wiring method as described above, when the strain value acquisition unit generates a signal for characterizing the horizontal shear force in two directions, signal transmission and signal acquisition are effectively realized, thereby improving the test efficiency of the bending moment and shear load of the offshore wind power tower.

[0151] Based on the above embodiment, a variant embodiment of the above embodiment is proposed. It should be noted that in order to make the description concise, only the differences from the above embodiment are described in the variant embodiment.

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

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

[0154] M1=E·W·ε 测 1 / A

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

[0156] In an embodiment of the present invention, the elastic modulus, the section resistance moment, 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, thereby realizing automatic acquisition of the first dynamic bending moment value M1, thereby improving the efficiency of acquiring 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 measurement section based on the elastic modulus, the section resistance moment, the second measured strain value and the bridge arm coefficient comprises:

[0158] The elastic modulus, the section resistance moment, 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. The Formula 2 is:

[0159] M2=E·W·ε 测 2 / A

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

[0161] In an embodiment of the present invention, the elastic modulus, the section resistance moment, 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, thereby achieving automatic acquisition of the second dynamic bending moment value M2, thereby improving the efficiency of acquiring the second dynamic bending moment value.

[0162] Optionally, the output voltage for the signal transmission unit and the signal acquisition unit can be 2(1+υ) times, because the symmetrical arrangement of the strain sensors of this technology has an average offset effect, which eliminates the influence of tensile and compressive deformation on the bending deformation measurement, and obtains accurate bending strain of the tower structure, thereby realizing large-range, high-precision stress and strain measurement and improving test 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 comprises:

[0164] Determining the length of the offshore wind tower;

[0165] Determine a bending moment change relationship between the first measurement section and the second measurement section based on the first dynamic bending moment value and the second dynamic bending moment value;

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

[0167] In the embodiment of the present invention, after determining the length of the offshore wind power tower, the shear force value for the offshore wind power tower can be calculated by 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 tower, which can be used as a variable;

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

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

[0177] H is a preset spacing distance between the first measurement section and the second measurement section;

[0178] Formula 3 Q = dM / dx is the basic equation for shear force, which states that shear force is equal to the rate of change of bending moment. Formula 3 states that shear force is equal to the first derivative of bending moment, and can be derived from the force balance in the small elements of an offshore wind tower.

[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 shows 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 calculate the shear force using these equations, we can substitute Equation 4 and Equation 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 between the bending moments at the two sections, divided by the distance between the two sections.

[0184] From the above, we can see that because the shear force is responsible for resisting the change of bending moment, the shear force is proportional to the change of bending moment and inversely proportional to the distance between the sections.

[0185] In an embodiment of the present invention, by determining the length of the offshore wind tower; determining the bending moment change relationship between the first measuring section and the second measuring section based on the first dynamic bending moment value and the second dynamic bending moment value; and calculating the shear force value for the offshore wind tower based on the length of the offshore wind tower, the bending moment change relationship and the preset spacing distance, automatic calculation of the shear force value for the offshore wind tower is achieved, thereby improving the calculation efficiency of the shear force value for the offshore wind tower.

[0186] In summary, the embodiment of the present invention measures the bending strain, considers eliminating the influence of tensile and compressive deformation on the bending deformation measurement, and saves the number of channels after the bridge is built; secondly, the bending moment is calculated; and finally, the shear force is calculated. The actual operating load of key sections such as the wind turbine tower can be measured 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 optimizing the design and verifying the simulation model of the wind turbine under various working conditions.

[0187] It should be noted that, for the sake of simplicity, the method embodiments are described as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0188] Reference Figure 7 , shows a structural block diagram of a bending moment and shear force testing system for offshore wind power 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 the first measurement section and the second measurement section for the offshore wind power tower according to a preset interval; the testing system for the bending moment and shear force of the offshore wind power component is configured with at least two groups of strain value acquisition units for the first measurement section and the second measurement section, and 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 adjacent and vertically arranged as a first strain gauge group, the second strain gauge and the third strain gauge are adjacent and vertically arranged as a second strain gauge group, and the first strain gauge group and the second strain gauge group are respectively arranged on both sides of the offshore wind power tower to form a group of strain value acquisition units;

[0190] A bridge arm coefficient determination module 702 is used to determine the bridge arm coefficient for the offshore wind power tower;

[0191] A material parameter module 703 is used to determine the tower elastic modulus and section resistance moment of the offshore wind power tower;

[0192] a measured strain value acquisition module 704, configured to acquire a first measured strain value for the first measurement section by using a strain value acquisition unit for the first measurement section, and to acquire a second measured strain value for the second measurement section by using a strain value acquisition unit for the second measurement section;

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

[0194] A second dynamic bending moment value calculation module 706, configured to calculate a second dynamic bending moment value for the second measurement section based on the elastic modulus, the section resistance moment, the second measurement strain value and the bridge arm coefficient;

[0195] The shear force value 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 for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0197] In addition, an embodiment of the present invention further provides an electronic device, comprising: 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, each process of the above-mentioned embodiment of the method for testing bending moment and shear force of offshore wind power components is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0198] The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, each process of the above-mentioned method for testing the bending moment and shear force of offshore wind power components is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. The computer-readable storage medium is, for example, 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: 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 appreciate that Figure 8 The electronic device structure shown in the figure does not constitute a limitation on the electronic device, and the electronic device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently. In the embodiments of the present invention, the electronic device includes but is not limited to a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted terminal, a wearable device, and a pedometer.

[0201] It should be understood that in the embodiment of the present invention, the radio frequency unit 801 can be used for receiving and sending signals during information transmission or communication. Specifically, after receiving downlink data from the base station, it is sent to the processor 810 for processing; in addition, uplink data is sent to the base station. Generally, 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. In addition, the radio frequency unit 801 can also communicate with the network and other devices through a wireless communication system.

[0202] The electronic device provides users with wireless broadband Internet access through the network module 802, such as helping users to send and receive emails, browse web pages, and access streaming media.

[0203] The audio output unit 803 can convert the audio data received by the RF unit 801 or the network module 802 or stored in the memory 809 into an audio signal and output it as sound. Moreover, the audio output unit 803 can also provide audio output related to a specific function performed by the electronic device 800 (for example, a call signal reception sound, a message reception sound, etc.). The audio output unit 803 includes a speaker, a buzzer, a receiver, etc.

[0204] The input unit 804 is used to receive audio or video signals. The input unit 804 may include a graphics processor (GPU) 8041 and a microphone 8042, and the graphics processor 8041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The processed image frame can be displayed on the display unit 806. The image frame processed by the graphics processor 8041 can be stored in the memory 809 (or other storage medium) or sent via the radio frequency unit 801 or the network module 802. The microphone 8042 can receive sound and can process such sound into audio data. The processed audio data can be converted into a format output that can be sent to a mobile communication base station via the radio frequency unit 801 in the case of a 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, wherein the ambient light sensor can adjust the brightness of the display panel 8061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 8061 and / or the backlight when the electronic device 800 is moved to the ear. As a type of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), and can detect the magnitude and direction of gravity when stationary, which can be used to identify the posture of the electronic device (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; the sensor 805 can also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which will not be repeated 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] The user input unit 807 can be used to receive input digital or character information, and to generate key signal input related to user settings and function control of the electronic device. Specifically, the user input unit 807 includes a touch panel 8071 and other input devices 8072. The touch panel 8071, also known as a touch screen, can collect the user's touch operation on or near it (such as the user's operation on the touch panel 8071 or near the touch panel 8071 using any suitable object or accessory such as a finger, stylus, etc.). The touch panel 8071 may include two parts: a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into the contact point coordinates, and then sends it to the processor 810, receives the command sent by the processor 810 and executes it. In addition, the touch panel 8071 can be implemented using multiple types such as resistive, capacitive, infrared and surface acoustic waves. In addition to the touch panel 8071, the user input unit 807 may also include other input devices 8072. Specifically, other input devices 8072 may include but are not limited to a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be described in detail here.

[0208] Furthermore, the touch panel 8071 may be overlaid on 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 the touch event. Then, the processor 810 provides a corresponding visual output on the display panel 8061 according to the type of the touch event. Figure 8 In the figure, the touch panel 8071 and the display panel 8061 are used as 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, which is not limited here.

[0209] The interface unit 808 is an interface for connecting an external device to the electronic device 800. For example, the external device may include a wired or wireless headset 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, etc. The interface unit 808 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the electronic device 800 or may be used to transmit data between the electronic device 800 and an external device.

[0210] The memory 809 can be used to store software programs and various data. The memory 809 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application required for a function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory 809 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0211] The processor 810 is the control center of the electronic device. It uses various interfaces and lines to connect various parts of the entire electronic device. By running or executing software programs and / or modules stored in the memory 809 and calling data stored in the memory 809, it performs various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. The processor 810 may include one or more processing units; preferably, the processor 810 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned 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 each component. Preferably, the power supply 811 may be logically connected to the processor 810 through a power management system, thereby implementing functions such as charging, discharging, and power consumption management 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 article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0215] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0216] like Fig. 9 As shown, in another embodiment provided by the present invention, a computer-readable storage medium 901 is also provided, in which instructions are stored. When the computer-readable storage medium 901 is run on a computer, the computer executes the method for testing the bending moment and shear force of offshore wind power components described in the above embodiment.

[0217] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

[0218] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed in the embodiments of the present invention can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

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

[0220] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

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

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

[0223] If the functions are implemented in the form of 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 the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical disks.

[0224] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for testing bending moment and shear force of offshore wind power components, characterized in that: The method is applied to a testing system for bending moment and shear force of an offshore wind power component, wherein the offshore wind power component at least includes an offshore wind power tower, and includes: The first measurement section and the second measurement section for the offshore wind power tower are determined according to a preset interval; the testing system for the bending moment and shear force of the offshore wind power component is configured with at least two groups of strain value acquisition units for the first measurement section and the second measurement section, and 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 adjacent to each other and arranged vertically as a first strain gauge group, the second strain gauge and the third strain gauge are adjacent to each other and arranged vertically as a second strain gauge group, and the first strain gauge group and the second strain gauge group are respectively arranged on both sides of the offshore wind power tower to form a group of strain value acquisition units; Determining a bridge arm coefficient for the offshore wind turbine tower; Determining a tower elastic modulus and a section resistance moment for the offshore wind power tower; Using a strain value acquisition unit for the first measurement section to acquire a first measurement strain value for the first measurement section, and using a strain value acquisition unit for the second measurement section to acquire a second measurement strain value for the second measurement section; Calculating a first dynamic bending moment value for the first measurement section based on the elastic modulus, the section resistance moment, the first measured strain value, and the bridge arm coefficient; Calculating a second dynamic bending moment value for the second measurement section based on the elastic modulus, the section resistance moment, the second measured strain value, and the bridge arm coefficient; A 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 A plurality of groups of the 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 power tower.

3. The method according to claim 1, characterized in that: The step of calculating a first dynamic bending moment value for the first measurement section based on the elastic modulus, the section resistance moment, the first measured strain value and the bridge arm coefficient comprises: The elastic modulus, the section resistance moment, the first measured strain value and the bridge arm coefficient are input into Formula 1 to calculate a first dynamic bending moment value for the first measured section. The Formula 1 is: M1=E·W·ε 测1 / A Wherein, M1 is the first dynamic bending moment value, E is the elastic modulus, W is the section resistance moment, ε 测1 is the first measured strain value, and A is 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 measurement section based on the elastic modulus, the section resistance moment, the second measured strain value and the bridge arm coefficient comprises: The elastic modulus, the section resistance moment, 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. The Formula 2 is: M2=E·W·ε 测2 / A Wherein, M2 is the second dynamic bending moment value, E is the elastic modulus, W is the section resistance moment, ε 测2 is the second measured strain value, and A is the bridge arm coefficient.

5. The method according to claim 4, characterized in that The step of calculating the shear force value for the offshore wind power tower based on the first dynamic bending moment value and the second dynamic bending moment value comprises: Determining the length of the offshore wind power tower; Determine a bending moment change relationship between the first measurement section and the second measurement section based on the first dynamic bending moment value and the second dynamic bending moment value; The shear force value for the offshore wind power tower is calculated based on the length of the offshore wind power tower, the bending moment variation relationship and the preset spacing 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 to transmit signals; The testing system for bending moment and shear force of offshore wind power components comprises a third welding terminal for collecting signals; The terminal of the first strain gauge group is connected to the welding point of the first welding terminal and the third welding terminal through the welding point of the first welding terminal; The terminal of the second strain gauge group is connected to a welding point of the second welding terminal and the third welding terminal through the welding point of the second welding terminal.

7. The method according to claim 6, characterized in that The wiring heads of the first strain gauge group are sequentially connected to the first welding pins of the first welding terminal, and the wiring heads of the first strain gauge group correspond to the first welding pins one by one; The wiring heads of the second strain gauge group are sequentially connected to the second welding pins of the second welding terminal, and the wiring heads of the second strain gauge group correspond to the second welding pins one by one; 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 through the first welding pin; The second terminal of the second strain gauge is connected to the third welding point of the third welding terminal through 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 terminal of the third strain gauge is connected to the second welding point of the third welding terminal through the second welding pin; The second terminal of the fourth strain gauge is connected to the second welding point of the third welding terminal through the first welding pin.

8. A testing system for bending moment and shear force of offshore wind power components, characterized in that: The offshore wind power component at least includes an offshore wind power tower, including: A measurement section determination module, used to determine a first measurement section and a second measurement section for the offshore wind power tower according to a preset interval; the testing system for bending moment and shear force of the offshore wind power component is configured with at least two groups of strain value acquisition units for the first measurement section and the second measurement section, and 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 adjacent and vertically arranged as a first strain gauge group, the second strain gauge and the third strain gauge are adjacent and vertically arranged as a second strain gauge group, and the first strain gauge group and the second strain gauge group are respectively arranged on both sides of the offshore wind power tower, forming a group of strain value acquisition units; A bridge arm coefficient determination module, used to determine the bridge arm coefficient for the offshore wind power tower; A material parameter module, used to determine the tower elastic modulus and section resistance moment of the offshore wind power tower; a measured strain value acquisition module, configured to acquire a first measured strain value for the first measurement section by using a strain value acquisition unit for the first measurement section, and to acquire a second measured strain value for the second measurement section by using a strain value acquisition unit for the second measurement section; A first dynamic bending moment value calculation module, used for calculating a first dynamic bending moment value for the first measurement section based on the elastic modulus, the section resistance moment, the first measured strain value and the bridge arm coefficient; A second dynamic bending moment value calculation module, used for calculating a second dynamic bending moment value for the second measurement section based on the elastic modulus, the section resistance moment, the second measured strain value and the bridge arm coefficient; A shear force value calculation module is used to calculate the shear force value for the offshore wind power 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 A plurality of groups of the 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 power tower.

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

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

12. The system according to claim 11, characterized in that The shear force value calculation module is also used for: Determining the length of the offshore wind power tower; Determine a bending moment change relationship between the first measurement section and the second measurement section based on the first dynamic bending moment value and the second dynamic bending moment value; The shear force value for the offshore wind power tower is calculated based on the length of the offshore wind power tower, the bending moment variation relationship and the preset spacing 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 to transmit signals; The testing system for bending moment and shear force of offshore wind power components comprises a third welding terminal for collecting signals; The terminal of the first strain gauge group is connected to the welding point of the first welding terminal and the third welding terminal through the welding point of the first welding terminal; The terminal of the second strain gauge group is connected to a welding point of the second welding terminal and the third welding terminal through the welding point of 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; The processor is used to implement the method according to any one of claims 1 to 7 when executing the program stored in the memory.

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

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