Blade design method and device, storage medium, electronic device and computer program product

Abstract

The invention discloses a blade design method and device, a storage medium, an electronic device and a computer program product, and relates to the field of blades, the blade design method comprises the following steps: initializing a sweepback starting position of a blade to obtain a reference position, and initializing an index value of a target index to obtain a reference value, the target index is an index distributed in a sweepback form of a blade tip section of the blade, the blade is divided into the blade tip section and a blade root section by a sweepback starting position, the blade tip section adopts a sweepback form, the blade root section adopts a sweepforward form, and the sweepback starting position has no sweepback and sweepforward forms; determining a blade tip sweepback amount meeting a first preset condition according to the reference position and the reference value to obtain a target sweepback amount; determining a sweepback starting position meeting a second preset condition and an index value of a target index according to the target sweepback amount to obtain a target position and a target index value; and determining the sweepback form of the blade tip section and the sweepforward form of the blade root section according to the target sweepback amount, the target position and the target index value.

Description

Technical Field

[0001] The present application relates to the field of blades, and more specifically, to a blade design method and device, a storage medium, an electronic device, and a computer program product. Background Art

[0002] As the blades continue to grow, they become heavier. In order to reduce the weight of the blades, on the one hand, high-performance carbon fiber can be used, but its price is high, more than 10 times that of glass fiber; on the other hand, the blade load can be reduced through aerodynamic shape design. At present, a more feasible method is to use blade sweep to achieve passive load reduction of the blade. The sweep form of the blade and the sweep amount of the blade tip will affect the root bending moment and torque, thereby affecting the blade deformation and the cost of the pitch system. The existing sweep form mainly refers to the pre-bending form of the blade. The design methods of the swept form and forward swept form of the blade are complex, the load on the blade is high, and the blade has great instability.

[0003] With regard to the problem in the related art that blades meeting preset conditions cannot be accurately determined, no effective solution has been proposed so far.

[0004] Therefore, it is necessary to improve the related technology to overcome the above-mentioned defects in the related technology. Summary of the invention

[0005] The embodiments of the present application provide a blade design method and device, a storage medium, an electronic device, and a computer program product to at least solve the problem of being unable to accurately determine blades that meet preset conditions.

[0006] According to one aspect of an embodiment of the present application, a blade design method is provided, comprising: initializing a swept starting position of a blade to obtain a reference position, and initializing an index value of a target index to obtain a reference value, wherein the target index is an index of the swept form distribution of the tip section of the blade, and the blade is divided into the tip section and the root section by the swept starting position, the tip section adopts a swept form, the root section adopts a forward swept form, and the swept starting position has no swept form and no forward swept form; determining a tip swept amount that satisfies a first preset condition according to the reference position and the reference value to obtain a target swept amount; determining a swept starting position and an index value of a target index that satisfy a second preset condition according to the target swept amount to obtain a target position and a target index value; determining the swept form of the tip section and the forward swept form of the root section according to the target swept amount, the target position and the target index value, wherein the swept starting position of the blade, the indication value of the target index and the tip swept amount are used to determine the swept amount at each position of the blade.

[0007] In an exemplary embodiment, a blade tip sweep amount that satisfies a first preset condition is determined according to the reference position and the reference value to obtain a target sweep amount, including: determining N reference blade tip sweep amounts from a blade tip sweep amount range according to the reference position and the reference value, wherein the blade root torque of the blade determined according to the i-th reference blade tip sweep amount among the N reference blade tip sweep amounts and the reference position and the reference value is less than a first preset threshold, and the blade tip torsional deformation angle determined is less than a second preset threshold, N is an integer greater than or equal to 1, and i is an integer greater than or equal to 1 and less than or equal to N; determining the target sweep amount from the N reference blade tip sweep amounts, wherein the blade root bending moment determined according to the target sweep amount, the reference position and the reference value is less than the blade root bending moment of the blade determined according to the reference blade tip sweep amounts other than the target sweep amount among the N reference blade tip sweep amounts, the reference position and the reference value.

[0008] In an exemplary embodiment, a swept starting position and an index value of a target index that meet a second preset condition are determined according to the target swept amount to obtain a target position and a target index value, including: determining M parameter pairs from a preset parameter pair set according to the target swept amount, wherein the preset parameter pair set includes parameter pairs consisting of index values ​​with different swept starting position ranges and different target indexes, the blade root torque of the blade determined according to the jth parameter pair among the M parameter pairs and the target swept amount is less than a first preset threshold, and the blade tip torsional deformation angle of the blade determined is less than a second preset threshold, M is an integer greater than or equal to 1, and j is an integer greater than or equal to 1 and less than or equal to M; determining a target parameter pair from the M parameter pairs, wherein the blade root bending moment of the blade determined according to the target parameter pair and the target swept amount is less than the blade root bending moment of the blade determined according to parameter pairs other than the target parameter pair among the M parameter pairs and the target swept amount, and the target parameter pair is a parameter pair consisting of the target position and the target index value.

[0009] In an exemplary embodiment, the swept form of the blade tip section and the swept form of the blade root section are determined according to the target swept amount, the target position and the target index value, including: determining the swept form of the blade tip section according to the target swept amount, the target position and the target index value; and determining the swept form of the blade root section according to the target position.

[0010] In an exemplary embodiment, determining the swept form of the blade tip segment according to the target swept amount, the target position and the target index value includes: determining the swept amount of each point on the blade tip segment by the following formula to determine the swept form of the blade tip segment: Where x is the extended distance from the point on the blade tip to the blade root, Dx is the sweep amount of the corresponding point on the blade, x is greater than x0 and less than or equal to the length of the blade, x0 is the target position, c is the target index value, D tip is the target sweep amount, x tip is the chord length of the blade.

[0011] In an exemplary embodiment, determining the forward sweep form of the blade root segment according to the target position includes: determining the sweep amount of each point on the blade root segment by the following formula to determine the forward sweep form of the blade tip segment: x =x(x-x0); where x is the extended distance from the point on the blade root segment to the blade root, D x is the sweep amount of the corresponding point on the blade root, x is greater than 0 and less than x0, and x0 is the target position.

[0012] According to another aspect of an embodiment of the present application, a blade design device is further provided, comprising: an initial module, used to initialize a swept starting position of a blade to obtain a reference position, and to initialize an index value of a target index to obtain a reference value, wherein the target index is an index of a swept form distribution of a tip section of the blade, the blade is divided into the tip section and the root section by the swept starting position, the tip section adopts a swept form, the root section adopts a forward swept form, and the swept starting position has no swept form and no forward swept form; a first determination module, used to determine the swept form according to the reference position and the A reference value is used to determine the tip sweep amount that meets the first preset condition to obtain a target sweep amount; a second determination module is used to determine the sweep starting position and the index value of the target index that meet the second preset condition according to the target sweep amount to obtain the target position and the target index value; a third determination module is used to determine the swept form of the tip section and the forward swept form of the root section according to the target sweep amount, the target position and the target index value, wherein the sweep starting position of the blade, the indication value of the target index and the tip sweep amount are used to determine the sweep amount at each position of the blade.

[0013] According to another aspect of the embodiment of the present application, a computer-readable storage medium is further provided, wherein the computer-readable storage medium includes a stored program, wherein the program is configured to execute the above-mentioned blade design method when running.

[0014] According to another aspect of the embodiment of the present application, there is further provided an electronic device, including a memory and a processor, wherein the memory stores a computer program, wherein the processor is configured to execute the above-mentioned blade design method through the computer program.

[0015] According to another aspect of the embodiments of the present application, a computer program product is provided, including a computer program, and the computer program is the above-mentioned blade design method when executed by a processor.

[0016] In the present application, a reference position and a reference value are obtained by initializing the swept starting position of the blade and the index value of the target index, and then a target swept amount that meets the first preset condition is determined based on the reference value and the reference position, and then a target position and a target position that meet the second preset condition are determined based on the target swept amount, and then the swept form of the tip section of the blade and the forward swept form of the root section of the blade are determined based on the target swept amount, the target position and the target index value, thereby accurately and quickly determining the swept form of the tip section of the blade and the forward swept form of the root section of the blade under the preset conditions, thereby solving the problem of being unable to accurately determine the blade that meets the preset conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 It is a hardware structure block diagram of a mobile terminal of a blade design method according to an embodiment of the present application;

[0020] Figure 2 is a flow chart of a blade design method according to an embodiment of the present application;

[0021] Figure 3 It is a structural block diagram of a blade design device according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] The method embodiments provided in the embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 is a hardware structure block diagram of a mobile terminal of a blade design method according to an embodiment of the present application. Figure 1 As shown, the mobile terminal may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor (MP) or a programmable logic device (FPGA)) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input / output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the mobile terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0025] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the method for detecting pneumatic imbalance in the embodiment of the present application. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, to implement the above method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0026] The transmission device 106 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0027] In order to solve the above problems, a blade design method is provided in this embodiment, including but not limited to being applied to the above mobile terminal. Figure 2 is a flow chart of a blade design method according to an embodiment of the present application, such as Figure 2 As shown, the process includes the following steps S202-S208:

[0028] Step S202: Initializing the swept start position of the blade to obtain a reference position, and initializing the index value of the target index to obtain a reference value, wherein the target index is an index of the swept form distribution of the tip section of the blade, and the blade is divided into the tip section and the root section by the swept start position, the tip section adopts a swept form, the root section adopts a forward swept form, and the swept start position has no swept form or forward swept form;

[0029] Optionally, in the initial stage, the reference value of the blade sweep starting position and the target index is set, that is, the blade is divided into a tip section and a root section, ensuring that there is no sweep back or forward sweep at the starting position, which sets the initial conditions for subsequent optimization, so that the optimization process has a clear starting point.

[0030] Step S204: determining a blade tip sweep amount that satisfies a first preset condition according to the reference position and the reference value, and obtaining a target sweep amount;

[0031] It should be noted that this process ensures that the blades maintain the safety of the variable pitch system and the structural stability of the blades while reducing the load. The determined target sweep value represents the preliminary optimization result of the sweep form of the blade tip section.

[0032] Step S206: determining a sweep start position and an index value of a target index that meet a second preset condition according to the target sweep amount, and obtaining a target position and a target index value;

[0033] Step S208: Determine the swept form of the tip section and the swept form of the root section according to the target swept amount, the target position and the target index value, wherein the swept starting position of the blade, the indicated value of the target index and the tip swept amount are used to determine the swept amount at each position of the blade.

[0034] Optionally, the sweep back and forward forms of the entire blade are determined according to the target sweep amount, target position and target index value obtained through optimization.

[0035] It should be noted that through the above two-step optimization, the sweep amount at each position of the blade can reach the optimal state, ensuring the stability and safety of the blade under wind action, significantly reducing dependence on expensive materials, and achieving dual optimization of cost and performance.

[0036] The above steps obtain a reference position and a reference value by initializing the swept starting position of the blade and the index value of the target index, and then determine the target swept amount that meets the first preset condition based on the reference value and the reference position, and then determine the target position and the target position that meet the second preset condition based on the target swept amount, and then determine the swept form of the tip section of the blade and the forward swept form of the root section of the blade based on the target swept amount, the target position and the target index value, thereby accurately and quickly determining the swept form of the tip section of the blade and the forward swept form of the root section of the blade under the preset conditions, thereby solving the problem of being unable to accurately determine the blade that meets the preset conditions.

[0037] In an exemplary embodiment, determining the blade tip sweep amount that satisfies the first preset condition according to the reference position and the reference value to obtain the target sweep amount can be achieved by the following steps S11-S12:

[0038] Step S11: determining N reference tip sweep amounts from a tip sweep amount range according to the reference position and the reference value, wherein the blade root torque of the blade determined according to the i-th reference tip sweep amount among the N reference tip sweep amounts and the reference position and the reference value is less than a first preset threshold, and the tip torsional deformation angle of the blade determined is less than a second preset threshold, N is an integer greater than or equal to 1, and i is an integer greater than or equal to 1 and less than or equal to N;

[0039] Optionally, first, based on the initialized sweep start position (i.e., reference position) and the reference value of the target index, N different reference tip sweep amounts are selected from a preset tip sweep amount range. The selection is based on the fact that when these reference tip sweep amounts are used in conjunction with the reference position and the reference value, the root torque and tip torsional deformation angle of the blade can be kept below a first preset threshold and a second preset threshold, respectively.

[0040] Optionally, the first preset threshold corresponds to an allowable torque value of the pitch system, and the second preset threshold may be 3 degrees.

[0041] It should be noted that no matter how the blade sweep is optimized, the torque transmitted to the pitch system at the blade root cannot exceed its allowable torque value (the allowable torque value of the pitch system). If the allowable value is exceeded, the pitch system may require a more powerful drive device, which will not only increase the cost, but also may lead to a decrease in the safety and reliability of the blade.

[0042] Step S12: Determine the target sweep amount from the N reference tip sweep amounts, wherein the root bending moment of the blade determined based on the target sweep amount, the reference position and the reference value is smaller than the root bending moment of the blade determined based on the reference tip sweep amount other than the target sweep amount among the N reference tip sweep amounts, the reference position and the reference value.

[0043] Optionally, among the N reference tip sweep amounts screened out in step S11, the tip sweep amount that minimizes the blade root bending moment is selected as the target sweep amount through further calculation and comparison. This selection process ensures that the final determined sweep form can minimize the maximum bending moment borne by the blade on the basis of the previous screening, thereby achieving effective reduction of the blade load under the premise of satisfying the torque and deformation angle constraints.

[0044] Optionally, the swept distribution form (i.e., the reference value of the target index) and the starting position (i.e., the reference position) are fixed, the tip swept amount is taken as a variable, the root torque not exceeding the allowable value of the pitch system and the tip torsional deformation angle not exceeding 3 degrees are constrained, Bladed is used to calculate the root torque and tip torsional deformation angle of the blade, and the minimum root bending moment is taken as the goal. An intelligent optimization algorithm (such as a PSO algorithm) is used to establish an optimization design model and determine the target swept amount.

[0045] It should be noted that, through the above two-step optimization process, this embodiment effectively solves the load optimization problem encountered in the design process of wind turbine blades. Specifically, step S11 sets a threshold to ensure that the designed blades will not cause safety problems or additional costs in actual operation due to excessive torque or blade tip torsional deformation angle exceeding the allowable range. On this basis, step S12 further optimizes the design to minimize the blade root bending moment, which is directly related to the structural strength and overall weight of the blade, thereby improving the economy and engineering applicability of the blade design.

[0046] It should be noted that this two-step screening and optimization method can ensure that wind turbine blades meet safety and performance requirements while achieving lightweight design, significantly reducing dependence on high-performance materials, reducing blade production and operating costs, and improving the market competitiveness and economic benefits of wind turbine equipment.

[0047] In an exemplary embodiment, determining the sweep start position and the index value of the target index that meet the second preset condition according to the target sweep amount, and obtaining the target position and the target index value can be achieved by the following steps S21-S22:

[0048] Step S21: determining M parameter pairs from a preset parameter pair set according to the target swept amount, wherein the preset parameter pair set includes parameter pairs having different swept starting position ranges and index values ​​of different target indexes, a blade root torque of the blade determined according to the jth parameter pair among the M parameter pairs and the target swept amount is less than a first preset threshold, and a blade tip torsional deformation angle of the blade determined is less than a second preset threshold, M is an integer greater than or equal to 1, and j is an integer greater than or equal to 1 and less than or equal to M;

[0049] Optionally, the system selects M parameter pairs from a set of preset parameter pairs for evaluation, which are composed of different index values ​​of the starting position of the sweep back and the target index. The selection of preset parameter pairs is screened from a wide range of possibilities to explore the impact of different sweep back designs on torque and deformation angle. The evaluation of each parameter pair is based on its coordination with the target sweep back amount, ensuring that when the parameter pair and the target sweep back amount are used, the determined blade root torque and blade tip torsional deformation angle will not exceed the first preset threshold and the second preset threshold set previously, thereby ensuring the basic requirements of the blade in terms of structural safety and operational stability.

[0050] Step S22: Determine a target parameter pair from the M parameter pairs, wherein the root bending moment of the blade determined according to the target parameter pair and the target sweep amount is smaller than the root bending moment of the blade determined according to parameter pairs other than the target parameter pair among the M parameter pairs and the target sweep amount, and the target parameter pair is a parameter pair consisting of the target position and the target index value.

[0051] Optionally, the M candidate parameter pairs screened out in step S21 are further analyzed and compared to find a parameter pair that can minimize the blade root bending moment, i.e., a target parameter pair. This parameter pair includes the optimal sweep start position (target position) and the optimal index value of the target index, which together determine the form of the blade sweep distribution. Through this process, the blade design not only meets the safety constraints of torque and deformation angle, but also achieves the minimization of the blade root bending moment, which is directly related to the structural strength and weight of the blade, as well as the operating efficiency and economy of the entire wind power generation system.

[0052] It should be noted that in step S21 and step S22 of this embodiment, by setting parameter pairs and using intelligent optimization algorithms, the index values ​​of the sweep start position and the target index are comprehensively explored and optimized. This optimization strategy ensures that when the blade is subjected to wind load, not only the torque at the root and the deformation angle at the tip are kept within a safe range, but also the goal of minimizing the bending moment at the root is achieved, thereby finding the best balance between structural safety and load reduction effect.

[0053] It should be noted that the final target position and target index value guide the specific design of the blade sweep distribution. This not only helps to reduce the weight of the blade, reduce material costs, and improve the fatigue life and overall performance of the blade, but also reduces the requirements for additional performance and cost of the variable pitch system, and enhances the operational stability and economic competitiveness of the wind turbine. Through this method, the aerodynamic shape of the blade can be controlled more accurately, and the ideal distribution of the blade load can be achieved, providing strong support for the lightweight and high-performance design of wind turbine blades.

[0054] In an exemplary embodiment, determining the swept form of the blade tip section and the swept form of the blade root section according to the target swept amount, the target position and the target index value can be achieved by the following steps S31 and S32:

[0055] Step S31: determining the sweep form of the blade tip section according to the target sweep amount, the target position and the target index value;

[0056] Optionally, according to the target sweep amount, the target position and the target index value obtained by the optimization algorithm, it can be determined that the sweep amount of the blade tip section follows an exponential function distribution.

[0057] It should be noted that this step ensures that the swept distribution of the blade at the tip section can effectively reduce the load while meeting the safety limits of the blade root torque and the tip torsional deformation angle.

[0058] Step S32: determining the forward sweep form of the blade root section according to the target position.

[0059] Optionally, the forward sweep form of the blade root section is determined on the basis of a known target position, which follows a quadratic polynomial distribution.

[0060] It should be noted that by setting the forward sweep form of the blade root section, forward sweep can be selectively introduced to offset the increase in torque that may be caused by the backward sweep in the blade root part, ensuring that the blade does not bring additional burden to the pitch system due to excessive blade root torque near the blade root.

[0061] It should be noted that through the above steps, the swept and forward forms of the blades are precisely formulated to achieve the best load distribution and structural performance. Among them, the swept form of the tip section can effectively reduce the wind load on the blade during operation, reduce the bending moment and torque of the blade root, and control the tip torsional deformation angle within a safe range, achieving an ideal distribution of the blade load, helping to reduce the weight of the blade and improve its structural strength and fatigue life; the forward swept form of the root section is designed to reduce the increase in root torque caused by the swept form, ensure the safety of the variable pitch system during operation, and avoid mechanical failures or additional costs that may be caused by excessive torque.

[0062] It should be noted that the optimized swept and forward swept forms can not only reduce the demand for high-performance materials and manufacturing costs, but also reduce the requirements for the performance of the variable pitch system and reduce the subsequent operation and maintenance costs, thereby improving the economic benefits of the entire wind power generation system.

[0063] In an exemplary embodiment, determining the swept form of the blade tip segment according to the target swept amount, the target position and the target index value may be achieved by the following steps: determining the swept amount of each point on the blade tip segment by the following formula to determine the swept form of the blade tip segment:

[0064]

[0065] Where x is the extended distance from the point on the blade tip to the blade root, D x is the sweep amount of the corresponding point on the blade, x is greater than x0 and less than or equal to the length of the blade, x0 is the target position, c is the target index value, D tip is the target sweep amount, x tip is the chord length of the blade.

[0066] Optionally, the sweep amount of each point on the blade tip segment is summarized to form a complete distribution diagram of the sweep form of the blade tip segment, that is, the sweep form of the blade tip segment is determined.

[0067] It should be noted that the extended distance is the distance from a point on the blade tip segment to the blade tip, perpendicular to the blade root plane.

[0068] It should be noted that x is greater than x0, that is, (x-x0) is a positive value. tip is the chord length of the blade, x0 is the target position, so (x tip -x0) is positive, so D x A positive value can determine the sweep form of the blade tip section.

[0069] It should be noted that the tip sweep distribution calculated by the above formula can ensure that the load parameters such as blade root torque and blade tip torsion deformation angle meet the safety and performance requirements under the optimized sweep form, while minimizing the blade root bending moment, effectively controlling the overall load distribution of the blade, and improving the mechanical properties and safety stability of the blade. The optimized sweep form helps to reduce the weight of the blade, reduce the dependence on high-performance materials, and reduce the manufacturing cost of the blade. At the same time, it reduces the additional cost that may be required for the variable pitch system due to the increase in torque, and improves the economy and market competitiveness of the entire wind power system. In addition, the above formula provides the ability to customize the tip sweep form according to the specific optimization results, so that each design can accurately calculate the sweep amount according to its unique target sweep amount, sweep starting position and index value, so as to adapt to the design requirements of wind turbine blades in different wind farms and different models.

[0070] In an exemplary embodiment, determining the forward sweep form of the blade root segment according to the target position may be achieved by the following steps: determining the sweep amount of each point on the blade root segment by the following formula to determine the forward sweep form of the blade tip segment:

[0071] D x =x(x-x0);

[0072] Where x is the extended distance from the point on the blade root segment to the blade root, D x is the sweep amount of the corresponding point on the blade root, x is greater than 0 and less than x0, and x0 is the target position.

[0073] It should be noted that x is greater than 0 and less than x0, that is, (x-x0) is a negative value, indicating that D x When the sweep amount of the corresponding point on the blade root is negative, the determined blade tip section is in the forward swept form.

[0074] Optionally, when (x=0) or (x=x0), the sweep amount (D x =0), ensuring a smooth connection between the root section and the tip section in a swept-back manner.

[0075] It should be noted that the smooth transition between the root section and the tip section avoids sudden changes in structural stress, reduces the vibration and noise caused by structural discontinuity during blade operation, and enhances the overall stability and reliability of the blade.

[0076] It should be noted that by adopting a sweep design with a quadratic polynomial distribution in the blade root section, the load on the blade during operation can be more effectively controlled, thus avoiding the problem of excessive local load and extending the service life of the blade.

[0077] It should be noted that through the above steps, not only a smooth transition between the root section and the tip section is achieved, but also the structure and dynamic performance of the blade are optimized, the manufacturing cost and operating cost are reduced, and the overall performance and market competitiveness of the wind turbine blade are improved.

[0078] Obviously, the above-described embodiments are only embodiments of a part of the present invention, rather than all embodiments. In order to better understand the above method, the above process is described below in conjunction with embodiments, but it is not intended to limit the technical solutions of the embodiments of the present invention, specifically:

[0079] 1. Divide the blade into two sections, namely the tip section and the root section, and at the junction of the two sections x0, there is no swept back form or forward swept form;

[0080] 2. The blade tip section adopts a general swept form, that is, it satisfies the following exponential function distribution:

[0081] Sweep

[0082] 3. The blade root section adopts the following quadratic polynomial distribution:

[0083] Sweep amount D x =x(x-x0);

[0084] To ensure that the sweep value of x0 and the blade root position is 0;

[0085] 4. Use a two-step method to optimize the swept form of the blade:

[0086] Step 1: Fix the swept distribution form and starting position, take the tip swept amount as the variable, take the root torque not exceeding the allowable value of the pitch system and the tip torsion deformation angle not exceeding 3 degrees as the constraints, use Bladed to calculate the root torque and tip torsion deformation angle of the blade, take the minimum root bending moment Mxy as the goal, use intelligent optimization algorithm, such as particle swarm optimization (PSO) algorithm, to establish an optimization design model;

[0087] Optimize the blade tip sweep amount with the lowest load;

[0088] Step 2: The tip sweep is fixed as the optimal tip sweep for the load, and the exponential value of the swept form distribution and the swept starting position are used as design variables. The root torque does not exceed the allowable value of the pitch system and the tip torsional deformation angle does not exceed 3 degrees. Bladed is used to calculate the root torque and tip torsional deformation of the blade. The goal is to minimize the root bending moment Mxy. An intelligent optimization algorithm, such as the PSO algorithm, is used to establish an optimization design model.

[0089] The index value and the starting position of the sweep form distribution with the lowest load are optimized;

[0090] 5. If the tip sweep amount has been determined, the key parameters of the sweep form can be directly used in the second step to optimize the blade.

[0091] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment 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 application, 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, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods of each embodiment of the present application.

[0092] In this embodiment, a blade design device is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware of a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0093] Figure 3 : is a structural block diagram of a blade design device according to an embodiment of the present application, the device comprising:

[0094] The initialization module 302 is used to initialize the swept start position of the blade to obtain a reference position, and to initialize the index value of the target index to obtain a reference value, wherein the target index is an index of the swept form distribution of the tip section of the blade, and the blade is divided into the tip section and the root section by the swept start position, the tip section adopts the swept form, the root section adopts the forward swept form, and the swept start position has no swept form and no forward swept form;

[0095] A first determination module 304 is used to determine a blade tip sweep amount that satisfies a first preset condition according to the reference position and the reference value, so as to obtain a target sweep amount;

[0096] A second determination module 306 is used to determine a sweep start position and an index value of a target index that meet a second preset condition according to the target sweep amount, and obtain a target position and a target index value;

[0097] The third determination module 308 is used to determine the swept form of the tip section and the swept form of the root section according to the target swept amount, the target position and the target index value, wherein the swept starting position of the blade, the indication value of the target index and the tip swept amount are used to determine the swept amount at each position of the blade.

[0098] The above-mentioned device obtains a reference position and a reference value by initializing the swept starting position of the blade and the index value of the target index, and then determines the target swept amount that meets the first preset condition based on the reference value and the reference position, and then determines the target position and the target position that meet the second preset condition based on the target swept amount, and then determines the swept form of the tip section of the blade and the forward swept form of the root section of the blade based on the target swept amount, the target position and the target index value, thereby accurately and quickly determining the swept form of the tip section of the blade and the forward swept form of the root section of the blade under the preset conditions, thereby solving the problem of being unable to accurately determine the blade that meets the preset conditions.

[0099] In an exemplary embodiment, the first determination module 304 is further used to determine N reference tip sweep amounts from a tip sweep amount range according to the reference position and the reference value, wherein the blade root torque of the blade determined according to the i-th reference tip sweep amount among the N reference tip sweep amounts and the reference position and the reference value is less than a first preset threshold, and the determined blade tip torsional deformation angle is less than a second preset threshold, N is an integer greater than or equal to 1, and i is an integer greater than or equal to 1 and less than or equal to N; determine the target sweep amount from the N reference tip sweep amounts, wherein the blade root bending moment determined according to the target sweep amount, the reference position and the reference value is less than the blade root bending moment of the blade determined according to the reference tip sweep amounts other than the target sweep amount among the N reference tip sweep amounts, the reference position and the reference value.

[0100] In an exemplary embodiment, the second determination module 306 is further used to determine M parameter pairs from a preset parameter pair set according to the target sweep amount, wherein the preset parameter pair set includes parameter pairs consisting of index values ​​with different sweep starting position ranges and different target indexes, the blade root torque of the blade determined according to the jth parameter pair among the M parameter pairs and the target sweep amount is less than a first preset threshold, and the blade tip torsional deformation angle of the blade determined is less than a second preset threshold, M is an integer greater than or equal to 1, and j is an integer greater than or equal to 1 and less than or equal to M; determine the target parameter pair from the M parameter pairs, wherein the blade root bending moment of the blade determined according to the target parameter pair and the target sweep amount is less than the blade root bending moment of the blade determined according to the parameter pairs other than the target parameter pair among the M parameter pairs and the target sweep amount, and the target parameter pair is a parameter pair consisting of the target position and the target index value.

[0101] In an exemplary embodiment, the third determination module 308 is further configured to determine the swept form of the blade tip section according to the target swept amount, the target position and the target index value; and determine the swept form of the blade root section according to the target position.

[0102] In an exemplary embodiment, the third determination module 308 is further configured to determine the sweep amount of each point on the blade tip segment by the following formula to determine the sweep form of the blade tip segment: Where x is the extended distance from the point on the blade tip to the blade root, D x is the sweep amount of the corresponding point on the blade, x is greater than x0 and less than or equal to the length of the blade, x0 is the target position, c is the target index value, D tip is the target sweep amount, x tip is the chord length of the blade.

[0103] In an exemplary embodiment, the third determination module 308 is further configured to determine the sweep amount of each point on the blade root segment by using the following formula to determine the forward sweep form of the blade tip segment: x =x(x-x0); where x is the extended distance from the point on the blade root segment to the blade root, D x is the sweep amount of the corresponding point on the blade root, x is greater than 0 and less than x0, and x0 is the target position.

[0104] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when running.

[0105] Optionally, in this embodiment, the storage medium may be configured to store a computer program for performing the following steps:

[0106] S1, initializing the swept starting position of the blade to obtain a reference position, and initializing the index value of the target index to obtain a reference value, wherein the target index is an index of the swept form distribution of the tip section of the blade, and the blade is divided into the tip section and the root section by the swept starting position, the tip section adopts the swept form, the root section adopts the forward swept form, and the swept starting position has no swept form and no forward swept form;

[0107] S2, determining a blade tip sweep amount that satisfies a first preset condition according to the reference position and the reference value, and obtaining a target sweep amount;

[0108] S3, determining a sweep start position and an index value of a target index that meet a second preset condition according to the target sweep amount, and obtaining a target position and a target index value;

[0109] S4, determining the swept form of the tip section and the forward swept form of the root section according to the target swept amount, the target position and the target index value, wherein the swept starting position of the blade, the indicated value of the target index and the tip swept amount are used to determine the swept amount at each position of the blade.

[0110] In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to, various media that can store computer programs, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0111] For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail herein.

[0112] An embodiment of the present application further provides a computer program product, including a computer program, and when the computer program is executed by a processor, the steps in any one of the above method embodiments are performed.

[0113] An embodiment of the present application further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0114] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0115] S1, initializing the swept starting position of the blade to obtain a reference position, and initializing the index value of the target index to obtain a reference value, wherein the target index is an index of the swept form distribution of the tip section of the blade, and the blade is divided into the tip section and the root section by the swept starting position, the tip section adopts the swept form, the root section adopts the forward swept form, and the swept starting position has no swept form and no forward swept form;

[0116] S2, determining a blade tip sweep amount that satisfies a first preset condition according to the reference position and the reference value, and obtaining a target sweep amount;

[0117] S3, determining a sweep start position and an index value of a target index that meet a second preset condition according to the target sweep amount, and obtaining a target position and a target index value;

[0118] S4, determining the swept form of the tip section and the forward swept form of the root section according to the target swept amount, the target position and the target index value, wherein the swept starting position of the blade, the indicated value of the target index and the tip swept amount are used to determine the swept amount at each position of the blade.

[0119] In an exemplary embodiment, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0120] For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail herein.

[0121] Obviously, those skilled in the art should understand that the above modules or steps of the present application can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order from that herein, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present application is not limited to any specific combination of hardware and software.

[0122] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A blade design method, characterized in that: include: Initializing the swept starting position of the blade to obtain a reference position, and initializing the index value of the target index to obtain a reference value, wherein the target index is an index of the swept form distribution of the tip section of the blade, the blade is divided into the tip section and the root section by the swept starting position, the tip section adopts a swept form, the root section adopts a forward swept form, and the swept starting position has no swept form or forward swept form; Determine a blade tip sweep amount that satisfies a first preset condition according to the reference position and the reference value, and obtain a target sweep amount; Determine a sweep start position and an index value of a target index that meet a second preset condition according to the target sweep amount, and obtain a target position and a target index value; The swept form of the tip section and the forward swept form of the root section are determined according to the target sweep amount, the target position and the target index value, wherein the swept starting position of the blade, the indicated value of the target index and the tip sweep amount are used to determine the swept amount at each position of the blade.

2. The method according to claim 1, characterized in that Determining a blade tip sweep amount that satisfies a first preset condition according to the reference position and the reference value to obtain a target sweep amount includes: Determine N reference tip sweep amounts from a tip sweep amount range according to the reference position and the reference value, wherein the blade root torque of the blade determined according to the i-th reference tip sweep amount among the N reference tip sweep amounts and the reference position and the reference value is less than a first preset threshold, and the tip torsional deformation angle of the blade determined is less than a second preset threshold, N is an integer greater than or equal to 1, and i is an integer greater than or equal to 1 and less than or equal to N; The target sweep amount is determined from the N reference tip sweep amounts, wherein the root bending moment of the blade determined based on the target sweep amount, the reference position and the reference value is smaller than the root bending moment of the blade determined based on the reference tip sweep amount other than the target sweep amount among the N reference tip sweep amounts, the reference position and the reference value.

3. The method according to claim 1, characterized in that Determining a sweep start position and an index value of a target index that meet a second preset condition according to the target sweep amount, and obtaining a target position and a target index value, including: Determine M parameter pairs from a preset parameter pair set according to the target sweep amount, wherein the preset parameter pair set includes parameter pairs having different sweep start position ranges and index values ​​of different target indexes, a blade root torque of the blade determined according to the jth parameter pair among the M parameter pairs and the target sweep amount is less than a first preset threshold, and a blade tip torsional deformation angle of the blade determined is less than a second preset threshold, M is an integer greater than or equal to 1, and j is an integer greater than or equal to 1 and less than or equal to M; A target parameter pair is determined from the M parameter pairs, wherein the root bending moment of the blade determined according to the target parameter pair and the target sweep amount is smaller than the root bending moment of the blade determined according to parameter pairs other than the target parameter pair among the M parameter pairs and the target sweep amount, and the target parameter pair is a parameter pair consisting of the target position and the target index value.

4. The method according to claim 1, characterized in that: Determining the swept form of the blade tip section and the swept form of the blade root section according to the target swept amount, the target position and the target index value includes: Determining a sweep form of the blade tip section according to the target sweep amount, the target position and the target index value; and A forward sweep form of the blade root section is determined according to the target position.

5. The method according to claim 4, characterized in that Determining the sweep form of the blade tip section according to the target sweep amount, the target position and the target index value includes: The sweep amount of each point on the blade tip section is determined by the following formula to determine the sweep form of the blade tip section: Where x is the extended distance from the point on the blade tip to the blade root, D x is the sweep amount of the corresponding point on the blade, x is greater than x0 and less than or equal to the length of the blade, x0 is the target position, c is the target index value, D tip is the target sweep amount, x tip is the chord length of the blade.

6. The method according to claim 4, characterized in that Determining the forward sweep form of the blade root section according to the target position includes: The sweep amount of each point on the blade root section is determined by the following formula to determine the forward sweep form of the blade tip section: D x =x(x-x0); Where x is the extended distance from the point on the blade root segment to the blade root, D x is the sweep amount of the corresponding point on the blade root, x is greater than 0 and less than x0, and x0 is the target position.

7. A blade design device, characterized in that: include: An initial module is used to initialize the swept starting position of the blade to obtain a reference position, and to initialize the index value of the target index to obtain a reference value, wherein the target index is an index of the swept form distribution of the tip section of the blade, the blade is divided into the tip section and the root section by the swept starting position, the tip section adopts the swept form, the root section adopts the forward swept form, and the swept starting position has no swept form and no forward swept form; A first determination module is used to determine a blade tip sweep amount that satisfies a first preset condition according to the reference position and the reference value, so as to obtain a target sweep amount; A second determination module is used to determine a sweep start position and an index value of a target index that meet a second preset condition according to the target sweep amount, and obtain a target position and a target index value; The third determination module is used to determine the swept form of the tip section and the swept form of the root section according to the target swept amount, the target position and the target index value, wherein the swept starting position of the blade, the indication value of the target index and the tip swept amount are used to determine the swept amount at each position of the blade.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein the program executes the method according to any one of claims 1 to 6 when executed.

9. An electronic device comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to execute the method according to any one of claims 1 to 6 through the computer program.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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