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

Abstract

The application discloses a blade design method and device, a storage medium, an electronic device and a computer program product, relates to the field of blades, and comprises the following steps: initializing a back-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 a back-swept form distribution of a tip section of the blade, the blade is divided into the tip section and a root section by the back-swept starting position, the tip section adopts the back-swept form, the root section adopts a forward-swept form, and the back-swept starting position is free of the back-swept and forward-swept forms; determining a tip back-swept amount satisfying a first preset condition according to the reference position and the reference value to obtain a target back-swept amount; determining the back-swept starting position and the index value of the target index satisfying a second preset condition according to the target back-swept amount to obtain a target position and a target index value; and determining the back-swept form of the tip section and the forward-swept form of the root section according to the target back-swept amount, the target position and the target index value.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of blades, in particular to a blade design method and device, a storage medium, an electronic device and a computer program product. BACKGROUND

[0002] With the increasing of the blade, the blade is getting heavier and heavier. In order to reduce the weight of the blade, on the one hand, high-performance carbon fiber can be used, but its price is high, which is more than 10 times that of glass fiber; on the other hand, the aerodynamic shape design is used to reduce the load of the blade. At present, a more feasible method is to realize the passive load reduction of the blade by using the blade sweepback. The sweepback form and the blade tip sweepback amount of the blade will affect the blade root bending moment and torque, thereby affecting the blade deformation and the cost of the variable pitch system, and the existing sweepback form mainly refers to the blade pre-bending form. The sweepback form and the forward sweep design method of the blade are complex, the load of the blade is high, and the blade has great instability.

[0003] In the related art, there is no effective solution to accurately determine the blade that meets the preset condition.

[0004] Therefore, it is necessary to improve the related art to overcome the defects in the related art. SUMMARY

[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 that the blade that meets the preset condition cannot be accurately determined.

[0006] According to an aspect of the embodiments of the present application, a blade design method is provided, including: 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, wherein the target index is an index of a sweepback form distribution of a blade tip section of the blade, the blade is divided into the blade tip section and a blade root section by the sweepback starting position, the blade tip section adopts a sweepback form, the blade root section adopts a forward sweep form, and the sweepback starting position has no sweepback form and forward sweep form; determining a blade tip sweepback amount that meets a first preset condition according to the reference position and the reference value to obtain a target sweepback amount; determining a sweepback starting position and an index value of a target index that meet a second preset condition 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 forward sweep form of the blade root section according to the target sweepback amount, the target position and the target index value, wherein the sweepback starting position of the blade, the index value of the target index and the blade tip sweepback amount are used to determine the sweepback amount of 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 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; determining the target sweep amount from the N reference blade tip sweep amounts, wherein the blade root bending moment of the blade 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 sweep start position and an index value of a target index that meet a second preset condition are determined according to the target sweep 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 sweep amount, wherein the preset parameter pair set includes parameter pairs consisting of index values ​​with different sweep start position ranges and different target indexes, the 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 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 root bending moment of the blade determined according to the target parameter pair and the target sweep amount is less 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.

[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 sweep amount, the target position, and the target index value includes: determining the swept form of the blade tip segment by determining the swept amount of each point on the blade tip segment using the following formula: 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 distance from the point on the blade root 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 initialization module for 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, 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 for determining the target index based on the reference position and the target index. A reference value determines 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 based on 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 based on 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 of each position of the blade.

[0013] According to another aspect of the embodiments of the present application, a computer-readable storage medium is 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 an embodiment of the present application, an electronic device is provided, including a memory and a processor, wherein a computer program is stored in the memory, 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 above-mentioned blade design method is implemented when the computer program is executed by a processor.

[0016] In this application, the reference position and reference value are obtained by initializing the swept starting position of the blade and the index value of the target index, and then the target swept amount that meets the first preset condition is determined based on the reference value and the reference position, and then the target position and 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 swept form of the root section of the blade are determined based on the target swept amount, target position and target index value, so as to accurately and quickly determine the swept form of the tip section of the blade and the 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 This is a hardware structure block diagram of a mobile terminal for 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 This 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 present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this 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 sequential order. 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 a sequence 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 This is a hardware structure 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 microprocessor (MP) or a programmable logic device (FPGA) and a processing device) and a memory 104 for storing data. The mobile terminal may also include a transmission device 106 and an input / output device 108 for communication functions. It will 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 than shown, or with Figure 1 Different configurations shown.

[0025] The memory 104 can be used to store computer programs, such as software programs and modules of application software, such as the computer program corresponding to the method for detecting aerodynamic imbalance in the embodiments of the present application. The processor 102 executes the computer program stored in the memory 104 to execute various functional applications and data processing, thereby implementing the above-mentioned method. The memory 104 may include high-speed random access memory and may also include 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 memory remotely located relative to the processor 102, and these remote memories may 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. A specific example of the aforementioned network may include a wireless network provided by the mobile terminal's communications provider. In one embodiment, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to enable communication with the Internet. In another embodiment, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0027] In order to solve the above problems, this embodiment provides a blade design method, 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 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 a swept form, and the root section adopts a forward swept form, and the swept starting 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 the tip section and the root section, ensuring that there is no sweep back or forward at the starting position, which sets the initial conditions for subsequent optimization and gives the optimization process 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, to obtain a target sweep amount;

[0031] It should be noted that this process ensures that the blade load is reduced while maintaining the safety of the variable pitch system and the structural stability of the blade. The determined target sweep amount represents the preliminary optimization result of the tip sweep form.

[0032] Step S206: determining a sweep start position and a target index value 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 of each blade position can reach the optimal state, ensuring the stability and safety of the blade under the action of wind, significantly reducing the dependence on expensive materials, and achieving dual optimization of cost and performance.

[0036] The above steps obtain the reference position and 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 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 based on the target swept amount, target position and target index value, so as to accurately and quickly determine 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 a blade root torque of the blade determined according to an 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 a tip torsional deformation angle of the blade determined is less than a second preset threshold, where 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, based on an initialized sweep start position (i.e., a reference position) and a reference value of a target index, N different reference tip sweep amounts are selected from a preset tip sweep amount range. The selection is based on whether these reference tip sweep amounts, when used in conjunction with the reference position and the reference value, can keep the blade root torque and the blade tip torsional deformation angle 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 costs but also may reduce 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 values ​​screened in step S11, the tip sweep value that minimizes the blade root bending moment is selected as the target sweep value through further calculation and comparison. This selection process ensures that, based on the initial screening, the final sweep configuration can minimize the maximum bending moment borne by the blade, thereby effectively reducing the blade load while 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 sweep amount is used as a variable, the root torque does not exceed the allowable value of the pitch system and the tip torsional deformation angle does not exceed 3 degrees as constraints, 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 the PSO algorithm) is used to establish an optimization design model and determine the target sweep amount.

[0045] It should be noted that, through the two-step optimization process described above, this embodiment effectively addresses the load optimization challenges encountered during wind turbine blade design. Specifically, step S11 sets a threshold to ensure that the designed blade will not, during actual operation, cause safety issues or additional costs due to excessive torque or blade tip torsional deformation angles outside the permitted range. Step S12 builds on this foundation by further optimizing the design to minimize the blade root bending moment, which directly impacts the blade's structural strength and overall weight, thereby improving the economical 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 achieve lightweight design while meeting safety and performance requirements, 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 sweep amount, wherein the preset parameter pair set includes parameter pairs having different sweep start position ranges and index values ​​of different target indices, 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;

[0049] Optionally, the system selects M parameter pairs from a set of preset parameter pairs for evaluation, each consisting of different sweep start positions and target index values. The preset parameter pairs are selected from a wide range of possibilities to explore the effects of different sweep designs on torque and deformation angle. Each parameter pair is evaluated based on its relationship with the target sweep value, ensuring that the root torque and tip torsional deformation angle determined using that parameter pair and the target sweep value do not exceed the first and second preset thresholds, thereby ensuring that the blade meets the basic requirements for 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 based on the target parameter pair and the target sweep amount is smaller than the root bending moment of the blade determined based on parameter pairs other than the target parameter pair in 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 in step S21 are further analyzed and compared to find a parameter pair that minimizes 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 minimizes 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 steps S21 and S22 of this embodiment, by setting a parameter pair set and employing an intelligent optimization algorithm, a comprehensive exploration and optimization of the sweep start position and target index value is performed. This optimization strategy ensures that when the blade is subjected to wind loads, not only does the torque at the blade root and the deformation angle at the blade tip remain within safe ranges, but also minimizes the blade root bending moment, thereby achieving an optimal balance between structural safety and load reduction.

[0053] It's important to note that the finalized target position and index value guide the specific design of the blade sweep distribution. This not only helps reduce blade weight, lower material costs, and improve blade fatigue life and overall performance, but also reduces the requirements for additional performance and cost of the variable pitch system, enhancing the operational stability and economic competitiveness of the wind turbine. This approach enables more precise control of the blade's aerodynamic shape, achieving an ideal distribution of blade loads, and 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 may 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 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 blade 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 swept form of the blade root section is determined based on 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 optimal load distribution and structural performance. The swept back form of the blade tip section can effectively reduce the wind load on the blade during operation, reduce the bending moment and torque at the blade root, and at the same time control the tip torsional deformation angle within a safe range, achieving an ideal distribution of blade loads, helping to reduce blade weight and improve its structural strength and fatigue life. The forward swept form of the blade root section is designed to reduce the increase in blade root torque caused by the swept back form, ensuring the safety of the variable pitch system during operation and avoiding 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 sweep amount, the target position, and the target index value may be achieved by the following steps: determining the swept form of the blade tip segment by determining the swept amount of each point on the blade tip segment using the following formula:

[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 aggregated 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 perpendicular to the blade root plane to the blade tip.

[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 swept 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 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, reduce the manufacturing cost of the blade, and reduce the additional cost of the variable pitch system due to the increase in torque, thereby improving 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, thereby adapting to the design requirements of wind turbine blades in different wind farms and different models.

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

[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 a 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 the smooth transition between the blade root section and the blade tip section is realized, but also the structure and dynamic performance of the blade is optimized, the manufacturing cost and operation cost are reduced, and the overall performance and market competitiveness of the wind power blade are improved.

[0078] Obviously, the above-described embodiments are only part of the embodiments of the present application, not all. In order to better understand the above method, the above process is described in combination with the following embodiments, but not used to limit the technical solutions of the embodiments of the present application, specifically:

[0079] 1. The blade is divided into two sections, i.e. the blade tip section and the blade root section, at the connection between the two sections x0, without sweepback form and forward sweep form;

[0080] 2. The blade tip section adopts a general sweepback form, i.e. satisfies the following exponential function distribution:

[0081] Sweepback amount

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

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

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

[0085] 4. Two-step method is adopted for the sweepback form optimization design of the blade:

[0086] First step: fixing the sweepback distribution form and the starting position, taking the blade tip sweepback amount as the variable, taking the blade root torque not exceeding the allowable value of the variable pitch system and the blade tip torsional deformation angle not exceeding 3 degrees as the constraint, calculating the blade root torque and the blade tip torsional deformation angle by Bladed, taking the minimum blade root bending moment Mxy as the target, using intelligent optimization algorithm such as particle swarm optimization (PSO) algorithm, and establishing the optimization design model;

[0087] The load-optimal blade tip sweepback amount is obtained by optimization;

[0088] Second step: fixing the blade tip sweepback amount as the load-optimal blade tip sweepback amount, taking the exponential value of the sweepback form distribution and the sweepback starting position as the design variable, taking the blade root torque not exceeding the allowable value of the variable pitch system and the blade tip torsional deformation angle not exceeding 3 degrees as the constraint, calculating the blade root torque and the blade tip torsional deformation by Bladed, taking the minimum blade root bending moment Mxy as the target, using intelligent optimization algorithm such as PSO algorithm, and establishing the optimization design model;

[0089] The load-optimal exponential value of the sweepback form distribution and the sweepback starting position are obtained by optimization;

[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 the necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present 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 enabling 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] This embodiment also provides a blade design device for implementing the above-mentioned embodiments and preferred embodiments. Details already described will not be repeated. As used below, the term "module" may refer to a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation using hardware, or a combination of software and hardware, is also possible and contemplated.

[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] An initialization module 302 is configured to initialize a swept-back starting position of the 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-back distribution of a tip section of the blade, and the blade is divided into the tip section and the root section by the swept-back starting position, wherein the tip section adopts a swept-back form and the root section adopts a forward swept form, and the swept-back starting position has neither a swept-back nor a forward swept form.

[0095] A first determining module 304 is configured to determine a blade tip sweep amount that satisfies a first preset condition based on the reference position and the reference value, to obtain a target sweep amount;

[0096] A second determining module 306 is configured to determine a sweep start position and a target index value that meet a second preset condition based on 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 tip torsional deformation angle of the blade 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; and the target sweep amount is determined from the N reference tip sweep amounts, wherein the blade root bending moment of the blade 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 based on 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 based on the j-th 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; a target parameter pair is determined from the M parameter pairs, wherein the blade root bending moment of the blade determined based on the target parameter pair and the target sweep amount is less than the blade root bending moment of the blade determined based on 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 determining module 308 is further configured to determine the sweep amount of each point on the blade tip segment by using 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 determining 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 distance from the point on the blade root 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. The computer program is configured to execute the steps of any of the above method embodiments when run.

[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, and the root section adopts the forward swept form, and the swept starting position has no swept form or 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, to obtain a target sweep amount;

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

[0109] S4. 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.

[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 here.

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

[0113] An embodiment of the present application further provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, 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 execute 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, and the root section adopts the forward swept form, and the swept starting position has no swept form or 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, to obtain a target sweep amount;

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

[0118] S4. 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.

[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 here.

[0121] Obviously, those skilled in the art should understand that the modules or steps of the present application described above can be implemented using a general-purpose computing device, they can be concentrated on a single computing device, or distributed across a network composed of multiple computing devices, they can be implemented using program code executable by the computing device, and thus, 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 performed in a different order than herein, or they can be fabricated into separate integrated circuit modules, or multiple modules or steps can be fabricated 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 embodiment 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 a swept-back starting position of the 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 a swept-back form distribution of a tip section of the blade, the blade being divided into the tip section and the root section by the swept-back starting position, the tip section adopting a swept-back form, the root section adopting a forward swept form, and the swept-back starting position having neither a swept-back form nor a forward swept form; 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; Determine a sweep start position and a target index value that meet a second preset condition according to the target sweep amount, and obtain a target position and a target index value; determining a swept form of the blade tip section and a swept form of the blade root section 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 blade tip swept amount are used to determine the swept amount at each position of the blade; The step of 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 comprises: 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; The step of 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, 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; Determining the swept form of the blade root segment according to the target position includes: determining the swept amount of each point on the blade root segment by the following formula to determine the swept form of the blade root segment: ； in, is the extended distance from the point on the blade root segment to the blade root, is the sweep amount of the corresponding point on the blade root, is greater than 0 and less than x0, where x0 is the target position.

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: Determining N reference tip sweep amounts from a tip sweep amount range according to the reference position and the reference value, wherein a blade root torque of the blade determined according to an 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 a tip torsional deformation angle of the blade determined is less than a second preset threshold, where 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: Determining 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 indices, a blade root torque of the blade determined according to a j-th 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 based on the target parameter pair and the target sweep amount is smaller than the root bending moment of the blade determined based on 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. A blade design device, characterized in that: include: an initialization module, configured to initialize a swept-back starting position of the 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-back form distribution of a tip section of the blade, the blade being divided into the tip section and the root section by the swept-back starting position, the tip section being in a swept-back form, the root section being in a forward swept form, and the swept-back starting position being neither swept-back nor forward swept; a first determining module, configured to determine 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; A second determining module is configured 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; a third determining module, configured to determine a swept form of the blade tip section and a swept form of the blade root section according to the target sweep amount, the target position, and a target index value, wherein the swept starting position of the blade, the indicator value of the target index, and the blade tip swept amount are used to determine the swept amount at each position of the blade; The third determining module is further configured to determine a swept form of the blade tip section according to the target swept amount, the target position, and the target index value; and to determine a swept form of the blade root section according to the target position; The third determining module is further configured to determine the sweep amount of each point on the blade tip segment by using 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; The third determining module 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 root segment: ； in, is the extended distance from the point on the blade root segment to the blade root, is the sweep amount of the corresponding point on the blade root, is greater than 0 and less than x0, where x0 is the target position.

5. 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 3 when executed.

6. 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 3 through the computer program.

7. 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 3 is implemented.

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