A method and device for targeted design of process parameters for three-dimensional woven preforms

Abstract

The present application relates to the technical field of three-dimensional woven composite materials, and particularly relates to a process parameter targeted design method and device for a three-dimensional woven preform. The method comprises the following steps: obtaining a first warp yarn design thickness and a first weft yarn design thickness based on the thickness of an interlacing point and the ratio of warp and weft stiffness; calculating an initial warp yarn layer number based on the first warp yarn design thickness, a warp yarn density and a warp yarn specification; transferring an error between an actual warp yarn thickness and the first warp yarn design thickness to weft yarn to obtain a second weft yarn design thickness; obtaining an initial weft yarn layer number based on the second weft yarn design thickness, a weft yarn density, a weft yarn specification and a thickness residual error; and determining a plying scheme of yarn at each interlacing point according to the difference between the initial warp yarn layer number and the initial weft yarn layer number and a basic layer number difference. The method can realize targeted design of process parameters from the geometric requirements and stiffness requirements of three-dimensional woven composite materials, and improve the parameter design efficiency and accuracy of complex profile preforms.

Description

Technical Field

[0001] This invention relates to the field of three-dimensional woven composite materials technology, and in particular to a method and apparatus for targeted design of process parameters for three-dimensional woven preforms. Background Technology

[0002] The design of traditional three-dimensional woven composite materials and their preforms mainly relies on empirical design and experimental testing. Because the geometry of the preform, process parameters, composite material properties, and structural performance of the component all influence each other, the shape of the preform and the structural performance of the final composite component need to be considered together during the design phase.

[0003] In existing technologies, a pre-defined woven structure is typically used, and process parameters are designed according to the layer relationship between warp and weft yarns in that structure, followed by calculation of the composite material's performance. However, this method is limited by the traditional warp and weft yarn layer relationship, making it impossible to directly design prefabricated process parameters that match the component's service performance, resulting in insufficient design accuracy and a long iteration cycle.

[0004] Therefore, there is an urgent need to provide a method and apparatus for targeted design of process parameters for three-dimensional woven preforms in order to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides a method and apparatus for targeted design of process parameters for three-dimensional woven preforms, which can achieve precise mapping from material stiffness requirements to weaving process parameters, thereby improving the efficiency and accuracy of parameter design for complex-shaped preforms.

[0006] In a first aspect, the present invention provides a method for targeted design of process parameters for three-dimensional woven preforms, comprising: Based on the total thickness at each interlacing point in the three-dimensional woven prefabricated body model and the ratio of warp stiffness to weft stiffness, the total thickness of the interlacing point is allocated to the thickness of the warp yarn and the thickness of the weft yarn to obtain the first warp yarn design thickness and the first weft yarn design thickness. Based on the design thickness, density and specification of the first warp yarn, calculate the initial number of warp layers at each interlacing point; The actual warp thickness is calculated based on the initial number of warp layers. The error between the actual warp thickness and the first warp design thickness is transferred to the weft thickness to obtain the second weft design thickness. Based on the second weft yarn design thickness, weft yarn density and weft yarn specification, for each interlacing point on the same column of weft yarns, the number of weft yarn layers at each interlacing point is calculated in order of increasing thickness. During the calculation process, the residual thickness error of the current interlacing point is transferred to the layer calculation of the next interlacing point to obtain the initial number of weft yarn layers at each interlacing point. The residual thickness error is the difference between the actual thickness of the weft yarn at each interlacing point and the second weft yarn design thickness. The basic warp yarn layer number and basic weft yarn layer number are obtained according to the woven structure type of each interlacing point. The basic layer difference is obtained based on the difference between the basic warp yarn layer number and the basic weft yarn layer number. Based on the difference between the initial warp yarn layer number and the initial weft yarn layer number and the basic layer difference, the yarn plying scheme at each interlacing point is determined, as well as the target warp yarn layer number and target weft yarn layer number after implementing the plying scheme, so as to complete the process parameter design of the three-dimensional woven preform.

[0007] Secondly, the present invention provides a device for targeted design of process parameters for three-dimensional woven preforms, comprising: The yarn thickness allocation module, based on the total thickness at each interlacing point in the three-dimensional woven prefabricated model and the ratio of warp stiffness to weft stiffness, allocates the total thickness of the interlacing point to the thickness of the warp yarn and the thickness of the weft yarn, thereby obtaining the first warp yarn design thickness and the first weft yarn design thickness. The initial warp layer number determination module is connected to the yarn thickness allocation module. Based on the first warp design thickness, warp density and warp specifications, it calculates the initial warp layer number at each interlacing point. The weft yarn design thickness adjustment module is connected to the initial warp yarn layer number determination module. It calculates the actual warp yarn thickness based on the initial warp yarn layer number and transfers the error between the actual warp yarn thickness and the first warp yarn design thickness to the weft yarn thickness to obtain the second weft yarn design thickness. The initial weft yarn layer number determination module is connected to the weft yarn design thickness adjustment module. Based on the second weft yarn design thickness, weft yarn density and weft yarn specification, for each interlacing point on the same column of weft yarns, the number of weft yarn layers at each interlacing point is calculated sequentially in order of thickness from small to large. During the calculation process, the thickness residual error of the current interlacing point is transferred to the layer number calculation of the next interlacing point to obtain the initial weft yarn layer number at each interlacing point. The thickness residual error is the difference between the actual thickness of the weft yarn at each interlacing point and the second weft yarn design thickness. The yarn plying module, connected to the initial weft yarn layer determination module, obtains the basic warp yarn layer number and basic weft yarn layer number based on the weaving structure type of each interlacing point. Based on the difference between the basic warp yarn layer number and the basic weft yarn layer number, it obtains the basic layer difference. Based on the difference between the initial warp yarn layer number and the initial weft yarn layer number, as well as the basic layer difference, it determines the yarn plying scheme at each interlacing point, and the target warp yarn layer number and target weft yarn layer number after executing the plying scheme, so as to complete the process parameter design of the three-dimensional woven preform.

[0008] Thirdly, the present invention provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, it implements the method described in the first aspect of the present invention.

[0009] Fourthly, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed in a computer, causes the computer to perform the method described in the first aspect of the present invention.

[0010] This invention provides a method and apparatus for targeted design of process parameters for three-dimensional woven preforms. By establishing a mapping relationship between stiffness ratio and warp / weft volume ratio, material performance requirements are inversely transformed into warp and weft thickness allocation, achieving a reverse mapping from material performance requirements to warp and weft thickness, thus improving design accuracy. By transferring the thickness error caused by rounding the warp layer count to the weft, and propagating the residual thickness error point-by-point in the weft layer count calculation, the thickness deviation caused by layer rounding can be effectively compensated. By comparing the difference between the initial warp and weft layer counts with the difference in the base layer count, warp or weft yarns are plyed, removing the constraints of the traditional warp / weft layer count relationship. The final output target warp layer count, target weft layer count, and plying scheme are used to guide the weaving process, reducing iterations and improving design efficiency. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a flowchart of a method for targeted design of process parameters for a three-dimensional woven preform, provided in an embodiment of the present invention. Figure 2 This is a hardware architecture diagram of an electronic device provided in an embodiment of the present invention; Figure 3This is a structural block diagram of a process parameter targeted design device for a three-dimensional woven preform according to an embodiment of the present invention; Figure 4 It is based on Figure 1 A schematic diagram of a complex-shaped prefabricated structure is shown. Figure 5 It is based on Figure 1 A schematic diagram of a warp yarn cross-section route is shown; Figure 6 It is based on Figure 1 A schematic diagram showing the range of volume fraction fluctuations is provided. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0014] Please refer to Figure 1 This invention provides a method for targeted design of process parameters for three-dimensional woven preforms, including: Step 100: Based on the total thickness at each interlacing point in the three-dimensional woven prefabricated body model and the ratio of warp stiffness to weft stiffness, the total thickness of the interlacing point is allocated to the thickness of the warp yarn and the thickness of the weft yarn to obtain the first warp yarn design thickness and the first weft yarn design thickness. Step 102: Based on the first warp design thickness, warp density, and warp specifications, calculate the initial number of warp layers at each interlacing point; Step 104: Calculate the actual warp thickness based on the initial number of warp layers, and transfer the error between the actual warp thickness and the first warp design thickness to the weft thickness to obtain the second weft design thickness; Step 106: Based on the design thickness, weft density and weft specification of the second weft yarn, for each interlacing point on the same column of weft yarns, calculate the number of weft yarn layers at each interlacing point in order of thickness from small to large, and transfer the residual thickness error of the current interlacing point to the layer calculation of the next interlacing point during the calculation process to obtain the initial number of weft yarn layers at each interlacing point; The thickness residual error is the difference between the actual thickness of the weft yarn and the designed thickness of the second weft yarn at each interlacing point. Step 108: Obtain the basic warp yarn layer number and basic weft yarn layer number according to the woven structure type of each interlacing point. Obtain the basic layer difference based on the difference between the basic warp yarn layer number and the basic weft yarn layer number. Determine the yarn plying scheme at each interlacing point, as well as the target warp yarn layer number and target weft yarn layer number after implementing the plying scheme, based on the difference between the initial warp yarn layer number and the initial weft yarn layer number and the basic layer difference, so as to complete the process parameter design of the three-dimensional woven preform.

[0015] In this embodiment, the design of prefabricated structures with complex surfaces requires consideration of structural performance, process feasibility, process parameter design, and process control program design. To achieve precise targeted design of the complex-surface 3D woven prefabricated structure process, the geometric thickness distribution, warp-to-weft stiffness ratio distribution, woven structure type distribution, and fiber raw material parameters at each interlacing point in the 3D woven prefabricated structure model are obtained. Based on the warp-to-weft stiffness ratio in the 3D woven prefabricated structure model, the warp-to-weft volume ratio at the interlacing point is calculated, and then the volume ratio is converted into a thickness distribution. The total thickness at the interlacing point is allocated to the warp and weft yarns to obtain the first warp design thickness and the first weft design thickness. Based on the first warp design thickness, warp density, and warp specifications, the initial number of warp layers at each interlacing point is calculated. The actual warp thickness is calculated based on the initial number of warp layers. An error transfer mechanism is used to transfer the error between the actual warp thickness and the first warp design thickness to the weft yarn, adjusting the weft design thickness to obtain the second weft design thickness. This effectively compensates for thickness deviations caused by rounding down the warp yarn count, ensuring the overall thickness meets design requirements. Based on the second weft yarn design thickness, weft yarn density, and weft yarn specifications, for each interlacing point on the same weft yarn column, the number of weft yarn layers at each interlacing point is calculated sequentially in ascending order of thickness. During the calculation process, the residual thickness error at the current interlacing point is transferred to the layer calculation of the next interlacing point, ultimately obtaining the initial number of weft yarn layers at each interlacing point. It can calculate the number of weft yarn layers for a given yarn specification based on the geometric thickness of the three-dimensional woven prefabricated body, and optimize the number of weft yarn layers point-by-point through an error propagation mechanism. At each interlacing point, it compensates for the error caused by rounding down the weft yarn count, achieving a uniform thickness distribution. The basic warp yarn layer count and basic weft yarn layer count are obtained based on the woven structure type at each interlacing point, and the difference between them is calculated as the basic layer difference. Based on the difference between the initial warp yarn layer count and the initial weft yarn layer count, as well as this basic layer difference, the yarn plying scheme at each interlacing point is determined, along with the target warp yarn layer count and target weft yarn layer count after implementing the plying scheme. It outputs the target number of warp yarn layers, the target number of weft yarn layers, and the plying scheme to guide the design of process parameters for 3D woven preforms. It enables precise mapping from material stiffness requirements to weaving process parameters, significantly improving the efficiency and accuracy of complex-shaped preform design.

[0016] Taking a precast structure with a complex surface as an example, such as Figure 4 As shown, the geometric contour of the prefabricated body is irregular. The geometric contour is divided according to the given warp and weft densities to obtain the positions of each interlacing point. The thickness distribution at each interlacing point is shown in Table 1, containing a total of 21 weft yarns (J-1 represents the first warp yarn) and 14 warp yarns (W-1 represents the first weft yarn), with a total of 294 interlacing points. The minimum thickness of the prefabricated body is 6.9 mm, and the maximum is 31.6 mm. Interlacing points with a thickness of 0 in the table indicate that no design is needed at that location (i.e., no yarn interlacing).

[0017] Table 1 - Distribution of total thickness at various interlacing points of the precast structure In the parameter design of three-dimensional woven preforms, it is usually necessary to meet the service performance requirements of the structure. Because the process parameters of three-dimensional woven composite materials vary widely, their material properties have strong design flexibility. Therefore, differentiated design can be carried out according to the stress state of the structure, i.e., different material properties can be designed for different regions. Typically, the warp and weft stiffness ratio at each interlacing point of the preform is obtained by optimizing the warp and weft stiffness distribution of the three-dimensional woven composite material, as shown in Table 2. The warp and weft stiffness ratios are different at each interlacing point, and the warp and weft volume ratio needs to be determined based on this ratio during design. The objectives of preform process design include minimizing the deviation between the composite material properties and given values, and minimizing the deviation of the designed fiber volume fraction.

[0018] Table 2 - Distribution of latitude-meridian stiffness ratios at each intersection point Considering that different woven structures have a certain impact on material properties and process feasibility, different woven structures need to be combined in different areas during the design process. It should be noted that how to specifically determine which woven structure to use is not the improvement point of this invention; the type of woven structure at each interlacing point is predetermined. Table 3 shows an example distribution of one type of woven structure, which includes three types of woven structures, distinguished by numbers 1, 2, and 3 respectively. Number 0 indicates that there is no thickness at this interlacing point (i.e., no design is required).

[0019] Table 3 - Distribution of Woven Structure Types at Each Interlacing Point Fiber raw material parameters include the physical properties of different fibers, such as the density of carbon fiber. ρ fThe fiber volume fraction is 1.78 g / cm³, the linear density per yarn is 443 g / km, and the elastic modulus is 275 GPa. Different fiber raw material parameters can affect the design deviation of the fiber volume fraction. Therefore, designers need to determine the type of fiber and its related parameters in advance.

[0020] The above are all input conditions and optimization objectives in the process of designing the process parameters of three-dimensional woven prefabricated bodies. Based on these geometric thickness distributions, warp and weft stiffness ratio distributions, woven structure type distributions, and fiber raw material parameters, and combined with the above methods and steps, the initial number of warp yarn layers, initial number of weft yarn layers, actual warp yarn thickness, actual weft yarn thickness, and plying scheme are calculated. Finally, the target number of warp yarn layers, target number of weft yarn layers, and plying scheme at each interlacing point are obtained, thereby completing the targeted design of the process parameters of three-dimensional woven prefabricated bodies.

[0021] In one embodiment of the present invention, based on the total thickness at each interlacing point in the three-dimensional woven prefabricated model and the ratio of warp stiffness to weft stiffness, the total thickness of the interlacing point is allocated to the thickness of the warp yarns and the thickness of the weft yarns to obtain the first warp yarn design thickness and the first weft yarn design thickness, including: Based on the total thickness at the interlacing point and the ratio of warp stiffness to weft stiffness, the design thickness of the first weft yarn at the interlacing point is obtained using the following formula: T W The thickness is designed for the first weft yarn. T i,j Intersection point ( i,j The total thickness of the yarn at point ) η s It is the ratio of the longitudinal stiffness to the latitudinal stiffness; Based on the design thickness of the first weft yarn, the design thickness of the first warp yarn is obtained using the following formula: T J The thickness is designed for the first warp yarn.

[0022] In this embodiment, it is assumed that there is a correlation between the warp-to-weft volume ratio and the ratio of warp stiffness to weft stiffness, at the interlacing point ( i,j At point (), the ratio of warp volume to weft volume is equal to the ratio of warp stiffness to weft stiffness at that interlacing point, and is expressed by the following formula: V J(i,j) Intersection point ( i,j warp volume at ) V W(i,j) Intersection point ( i,j Volume of weft yarn at point ) E J(i,j) Intersection point ( i , j The meridional stiffness at point ) E W(i,j) Intersection point ( i , j ) latitudinal stiffness at point ) η s Intersection point ( i,j The ratio of the longitudinal stiffness to the latitudinal stiffness at point ().

[0023] Based on the above relationship, the fiber volume fraction of warp and weft yarns can be set to be the same, and the thickness ratio of warp and weft yarns can be calculated. The total thickness at each interlacing point can then be rationally distributed between the warp and weft yarns, dividing the total thickness into a first warp yarn design thickness and a first weft yarn design thickness. The division is based on the stiffness ratio of warp and weft yarns; the larger the stiffness ratio, the greater the thickness allocated to the warp yarns. After obtaining the thickness of the warp and weft yarns, the number of warp yarn layers and the number of weft yarn layers can be calculated according to the following steps.

[0024] In one embodiment of the present invention, the initial number of warp layers is calculated using the following formula: N J This represents the initial number of warp layers. Indicates rounding down. T J(i,j) Intersection point ( i,j The design thickness of the first warp yarn at point ) γ J The warp coefficient is the bending factor of the warp yarn. M J For warp density, t 0 represents the thickness per unit thickness, indicating the thickness of 1K yarn at the target volume fraction. 1K yarn is yarn containing one thousand fibers. , m 1k The weight of 1cm length of 1K yarn. v fg For the target volume fraction, ρ f Fiber density, K J This refers to the warp yarn specification, indicating the number of warp yarns in each layer. K J 1K yarn.

[0025] In this embodiment, the goal of warp layer design is to calculate the number of warp layers and warp specifications at each interlacing point, while minimizing volume fraction error. For ease of calculation, a unit thickness is defined. The unit thickness is the thickness of a yarn containing one thousand fibers (i.e., 1K yarn) under a target volume fraction constraint. The calculation sets the yarn density to one fiber per centimeter, the yarn curvature coefficient to 1.0, and the target volume fraction constraint to arrange 1K yarns (assuming no yarn curvature) within a 1cm square, and then calculates the thickness of the 1K yarn within that square. The unit thickness calculation is based on fiber density and yarn weight, where yarn weight refers to the weight of 1K yarn per unit length (1 cm) (in g / cm). Fiber density is determined based on the selected fiber material. The unit thickness is the basis for calculating the number of warp layers, and this standardized calculation method ensures consistency in calculation results for different fiber materials and yarn specifications. Once the unit thickness is obtained, the initial number of warp layers at each interlacing point can be calculated by combining the design thickness of the first warp yarn, the warp density, the warp specification, and the warp bending coefficient.

[0026] It should be noted that since the number of warp layers, warp density, and warp gauge together determine the design accuracy of the warp, the error between the actual warp thickness and the initial warp design thickness can be reduced by adjusting the warp gauge or warp density. If this error cannot be completely eliminated, it can be transferred to the weft design for compensation.

[0027] In one embodiment of the present invention, the actual warp thickness is calculated based on the initial number of warp layers, and the error between the actual warp thickness and the first warp design thickness is transferred to the weft thickness to obtain the second weft design thickness, including: Based on the initial number of warp layers, the actual warp thickness is calculated using the following formula: T d This refers to the actual thickness of the warp yarns. γ J The warp coefficient is the bending factor of the warp yarn. M J For warp density, t 0 represents the unit thickness. N J This represents the initial number of warp layers. K J Specifications for warp yarns; The error between the actual warp thickness and the first warp design thickness is transferred to the weft thickness, and the second weft design thickness is calculated using the following formula: T W,new The thickness is designed for the second weft yarn.T W The thickness is designed for the first weft yarn. T J The thickness is designed for the first warp yarn. This represents the error between the actual thickness of the warp yarns and the designed thickness of the first warp yarn. .

[0028] In this embodiment, due to the rounding down operation during the initial warp layer calculation, there is an error between the final calculated actual warp thickness and the first warp design thickness. To solve this problem, the technical solution of this invention adjusts the thickness distribution between the warp and weft yarns, transferring the thickness error caused by the warp yarns to the thickness of the weft yarns, thereby adjusting the first weft design thickness to obtain the second weft design thickness. The second warp design thickness is: T J,new = T J - ε J T J The second warp yarn is designed to have a thickness of: T W,new = T W + ε J T J .

[0029] Specifically, the adjusted first warp yarn design thickness (i.e., the actual warp yarn thickness) and the adjusted first weft yarn design thickness (i.e., the second weft yarn design thickness) are determined through an error transfer mechanism: the warp yarn thickness error is subtracted from the first warp yarn design thickness, while this error is simultaneously added to the first weft yarn design thickness. By adjusting the distribution of warp and weft yarn thickness, the warp yarn thickness error is transferred to the weft yarn, ensuring the accuracy of the overall thickness. For example, if the warp yarn design thickness is smaller than the actual thickness, the error will be transferred to the weft yarn, keeping the overall thickness unchanged. The advantage of this method is that it can absorb errors through the weft yarn while ensuring the accuracy of the warp yarn design, thus improving the accuracy of the overall design.

[0030] In one embodiment of the present invention, based on the second weft yarn design thickness, weft yarn density, and weft yarn specification, for each interlacing point on the same column of weft yarns, the number of weft yarn layers at each interlacing point is calculated sequentially in ascending order of thickness. During the calculation process, the residual thickness error of the current interlacing point is transferred to the layer calculation of the next interlacing point, resulting in the initial number of weft yarn layers at each interlacing point, including: For each interlacing point on the same column of weft yarns, calculate the number of weft yarn layers at each interlacing point in order of increasing thickness; The effective weft yarn thickness at the current interlacing point is obtained by adding the design thickness of the second weft yarn at the current interlacing point to the residual thickness error of the previous interlacing point. Calculate the initial number of weft layers at the current interlacing point based on the effective weft thickness, weft density, weft specification, and weft bending coefficient. The actual thickness of the weft yarn at the current interlacing point is calculated based on the initial number of weft yarn layers. The difference between the effective weft yarn thickness and the actual weft yarn thickness is taken as the thickness residual error and transferred to the next interlacing point to calculate the effective weft yarn thickness of the next interlacing point. Repeat the above calculation steps until the initial number of weft yarn layers at each interlacing point is obtained.

[0031] In this embodiment, after obtaining the second weft yarn design thickness, the weft yarn parameters, including the number of weft yarn layers and the weft yarn specification, can be calculated. For each interlacing point on the same column of weft yarns, they are first sorted according to their thickness from smallest to largest, and the design begins sequentially from the interlacing point with the smallest thickness. For the first interlacing point on each column of weft yarns... k At the interlacing point, the effective weft thickness currently used in the calculation is the sum of the second weft design thickness at that interlacing point and the residual thickness error passed from the previous interlacing point. For the _th k For each interlacing point with non-zero thickness, the initial number of weft layers is calculated based on the effective thickness, weft density, weft specification, and weft curvature coefficient. The specification and quantity of each weft layer are then determined accordingly. After calculating the initial number of weft layers for each interlacing point, the residual thickness error is calculated and passed to the next interlacing point as input for its effective thickness calculation. This process is repeated until the initial number of weft layers at all interlacing points on the same weft yarn column is obtained.

[0032] In one embodiment of the present invention, for the first [unclear] on the same column of weft yarns k The initial number of weft yarn layers at each interlacing point is calculated using the following formula: For the first k The initial number of weft yarn layers at each interlacing point T k For the first k Effective weft yarn thickness at each interlacing point , For the first k The design thickness of the second weft yarn at each interlacing point R k-1 This is the residual thickness error from the previous interlacing point. γ W This is the weft yarn bending coefficient. M W For weft yarn density, t 0 represents the unit thickness.K W The weft yarn specification indicates the number of yarns in each layer of weft yarn. K W One 1K yarn; The actual thickness of the weft yarn at the current interlacing point is calculated using the following formula. : The residual thickness error at the current interlacing point is calculated using the following formula. R k : R k This represents the residual thickness error at the current interlacing point.

[0033] In this embodiment, for the first weft yarn in the same column... k There are several interlacing points, and the initial number of weft yarn layers at each point is determined by a preset calculation formula. Specifically, based on the effective weft yarn thickness, weft yarn density, weft yarn specification, and weft yarn curvature coefficient at the interlacing point, the initial number of weft yarn layers is obtained after rounding down. Based on this initial number of weft yarn layers and the aforementioned parameters, the actual weft yarn thickness at the interlacing point can be further calculated, and the difference between the effective weft yarn thickness and the actual weft yarn thickness is used as the residual thickness error and passed to the next interlacing point.

[0034] In one embodiment of the present invention, the plying scheme of the yarn at each interlacing point is determined based on the difference between the initial number of warp yarn layers and the initial number of weft yarn layers, and the difference in the base number of layers, as well as the target number of warp yarn layers and the target number of weft yarn layers after implementing the plying scheme, including: Calculate the difference between the initial number of warp yarn layers and the initial number of weft yarn layers; If the difference between the initial number of warp yarn layers and the initial number of weft yarn layers is greater than the difference in the base number of layers, then the excess warp yarns will be plyed together. If the difference between the initial number of warp yarn layers and the initial number of weft yarn layers is less than the difference in the base number of layers, then the excess weft yarns will be plyed.

[0035] In this embodiment, after determining the initial number of warp and weft yarn layers, the arrangement of warp and weft yarns is determined according to the weaving structure type at each interlacing point. The weaving structure type at each interlacing point is obtained, and the basic warp and weft yarn layers corresponding to that structure are determined. The difference between the two, i.e., the basic layer difference, is then calculated. Based on the difference between the initial warp and weft yarn layers calculated at the current interlacing point, and the relationship between the basic layer difference, the following three cases are identified: In the first case, when the difference between the initial number of warp yarn layers and the initial number of weft yarn layers is equal to the difference in the number of basic layers, it means that the number of layers designed for this interlacing point matches the number of layers in the basic structure. No plying is required; simply expand the number of layers in the basic structure proportionally to match the designed number of layers.

[0036] In the second scenario, when the difference between the initial warp yarn layer count and the initial weft yarn layer count is greater than the difference in the base layer count, it indicates that the number of warp yarn layers is excessive relative to the number of weft yarn layers, and the layer count does not match the basic structure. In this case, the warp yarns need to be plyed (during the plying process, the warp yarns are arranged and grouped in order from both sides towards the center, prioritizing grouping by structure type, until excess warp yarns are plyed). This involves merging multiple warp yarns into one equivalent warp yarn, ensuring that the difference between the plyed warp yarn layer count and the weft yarn layer count equals the difference in the base layer count. Then, the final number of warp and weft yarn layers is determined according to the first scenario.

[0037] In the third scenario, when the difference between the initial warp yarn layer count and the initial weft yarn layer count is less than the difference in the base layer count, it indicates that the weft yarn layer count is excessive relative to the warp yarn layer count, resulting in a mismatch with the layer count relationship of the basic structure. In this case, the weft yarns need to be plyed (during the plying process, the weft yarns are arranged and grouped in order from the middle outwards, prioritizing grouping by structure type, until excess weft yarns are plyed). This involves merging multiple weft yarns into one equivalent weft yarn, ensuring that the difference between the warp yarn layer count and the plyed weft yarn layer count equals the difference in the base layer count. Then, the final warp and weft yarn layer counts are determined according to the first scenario.

[0038] Through the above plying process, the target number of warp yarn layers and the target number of weft yarn layers after implementing the plying scheme at each interlacing point can be obtained.

[0039] In a specific example, the basic structure of a three-dimensional woven fabric has 3 warp layers and 4 weft layers, meaning there is one less warp layer than weft layer. When the number of warp layers is greater than 3, according to the warp and weft layer relationship in the fabric structure, the warp yarns are arranged and grouped in order from both sides towards the center, and the weft yarns are arranged and grouped in order from the center towards both sides.

[0040] It should be noted that, unless otherwise specified, the terms "number of yarn layers" or "number of warp yarn layers" and "number of weft yarn layers" used in this patent refer to a single, independent yarn. After the plying operation, the described "number of warp yarn layers after plying" or "combined yarn" refers to a single equivalent yarn formed by combining, twisting, or bundling multiple independent yarns. In other words, the plying process combines multiple yarns into a thicker yarn to reduce the equivalent number of yarn layers, thereby satisfying the layer relationship constraints of the basic woven structure.

[0041] Example 1: When the design has 15 warp layers and 10 weft layers: In this case, the number of warp layers was too high. Therefore, the 15 warp layers were merged into 9 layers. After merging, the original number of warp layers in each layer was 2, 2, 2, 1, 1, 1, 2, 2, 2. The original 15 warp layers were numbered as follows after merging: 1, 1, 2, 2, 3, 3, 4, 5, 6, 7, 7, 8, 8, 9, 9.

[0042] Example 2: When the design has 15 warp layers and 20 weft layers: In this case, the number of weft yarn layers was too high. Therefore, the 20 weft yarn layers were merged into 16 layers. After merging, the original number of weft yarn layers in each layer is as follows: 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1. The original 20 weft yarn layers are numbered as follows after merging: 1, 2, 3, 4, 5, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 12, 13, 14, 15, 16.

[0043] The warp yarn layer distribution, designed based on stiffness and thickness, is shown in Table 4, and the weft yarn layer distribution is shown in Table 5.

[0044] Table 4 - Distribution of Warp Yarn Layers Table 5 - Distribution of Weft Yarn Layers The path distribution of warp and weft yarns is as follows Figure 5 As shown, the yarns are automatically distributed and combined according to the structural form. When there are many weft yarn layers, the weft yarns are automatically merged; when there are many warp yarn layers, the warp yarns are automatically merged.

[0045] The fluctuation of fiber volume fraction is as follows Figure 6 As shown in the figure. In this example, the target volume fraction was 55%, and the final designed volume fraction fluctuated between 54.8% and 55.2%.

[0046] like Figure 2 , Figure 3 As shown, this specification provides a device for targeted design of process parameters for three-dimensional woven preforms. The device can be implemented via software, hardware, or a combination of both. From a hardware perspective, as... Figure 2 The diagram shown is a hardware architecture diagram of an electronic device for targeted design of process parameters of a three-dimensional woven preform, as provided in an embodiment of this specification. (Except for...) Figure 2In addition to the processor, memory, network interface, and non-volatile memory shown, the electronic device in the embodiment may also include other hardware, such as a forwarding chip responsible for processing packets. Taking software implementation as an example, such as... Figure 3 As shown, a device in a logical sense is formed by the CPU of the electronic device in which it is located reading the corresponding computer program from the non-volatile memory into the memory for execution.

[0047] like Figure 3 As shown, this embodiment provides a process parameter targeted design device for a three-dimensional woven preform, comprising: The yarn thickness allocation module 300, based on the total thickness of each interlacing point in the three-dimensional woven prefabricated model and the ratio of warp stiffness to weft stiffness, allocates the total thickness of the interlacing point to the thickness of the warp yarn and the thickness of the weft yarn to obtain the first warp yarn design thickness and the first weft yarn design thickness. The initial warp layer number determination module 302 is connected to the yarn thickness allocation module. Based on the first warp design thickness, warp density and warp specifications, it calculates the initial warp layer number at each interlacing point. The weft yarn design thickness adjustment module 304 is connected to the initial warp yarn layer number determination module. It calculates the actual warp yarn thickness based on the initial warp yarn layer number and transfers the error between the actual warp yarn thickness and the first warp yarn design thickness to the weft yarn thickness to obtain the second weft yarn design thickness. The initial weft yarn layer number determination module 306 is connected to the weft yarn design thickness adjustment module. Based on the second weft yarn design thickness, weft yarn density and weft yarn specification, for each interlacing point on the same column of weft yarns, the number of weft yarn layers at each interlacing point is calculated sequentially in order of thickness from small to large. During the calculation process, the thickness residual error of the current interlacing point is transferred to the layer number calculation of the next interlacing point to obtain the initial weft yarn layer number at each interlacing point. The thickness residual error is the difference between the actual thickness of the weft yarn at each interlacing point and the second weft yarn design thickness. The yarn plying module 308 is connected to the initial weft yarn layer determination module. It obtains the basic warp yarn layer number and basic weft yarn layer number according to the weaving structure type of each interlacing point. It obtains the basic layer difference based on the difference between the basic warp yarn layer number and the basic weft yarn layer number. Based on the difference between the initial warp yarn layer number and the initial weft yarn layer number and the basic layer difference, it determines the yarn plying scheme at each interlacing point, as well as the target warp yarn layer number and target weft yarn layer number after executing the plying scheme, so as to complete the process parameter design of the three-dimensional woven preform.

[0048] In this embodiment of the invention, the yarn thickness allocation module 300 can be used to execute step 100 in the above method embodiment, the initial warp layer number determination module 302 can be used to execute step 102 in the above method embodiment, the weft yarn design thickness adjustment module 304 can be used to execute step 104 in the above method embodiment, the initial weft layer number determination module 306 can be used to execute step 106 in the above method embodiment, and the yarn plying module 308 can be used to execute step 108 in the above method embodiment.

[0049] In one embodiment of the present invention, the yarn thickness distribution module is configured to perform the following operations: Based on the total thickness at the interlacing point and the ratio of warp stiffness to weft stiffness, the design thickness of the first weft yarn at the interlacing point is obtained using the following formula: T W The thickness is designed for the first weft yarn. T i,j Intersection point ( i,j The total thickness of the yarn at point ) η s It is the ratio of the longitudinal stiffness to the latitudinal stiffness; Based on the design thickness of the first weft yarn, the design thickness of the first warp yarn is obtained using the following formula: T J The thickness is designed for the first warp yarn.

[0050] In one embodiment of the present invention, the initial number of warp layers is calculated using the following formula: N J This represents the initial number of warp layers. Indicates rounding down. T J(i,j) Intersection point ( i,j The design thickness of the first warp yarn at point ) γ J The warp coefficient is the bending factor of the warp yarn. M J For warp density, t 0 represents the thickness per unit thickness, indicating the thickness of 1K yarn at the target volume fraction. 1K yarn is yarn containing one thousand fibers. , m 1k The weight of 1cm length of 1K yarn. v fg For the target volume fraction, ρf Fiber density, K J This refers to the warp yarn specification, indicating the number of warp yarns in each layer. K J 1K yarn.

[0051] In one embodiment of the present invention, the weft yarn thickness adjustment module is configured to perform the following operations: Based on the initial number of warp layers, the actual warp thickness is calculated using the following formula: T d This refers to the actual thickness of the warp yarns. γ J The warp coefficient is the bending factor of the warp yarn. M J For warp density, t 0 represents the unit thickness. N J This represents the initial number of warp layers. K J Specifications for warp yarns; The error between the actual warp thickness and the first warp design thickness is transferred to the weft thickness, and the second weft design thickness is calculated using the following formula: T W,new The thickness is designed for the second weft yarn. T W The thickness is designed for the first weft yarn. T J The thickness is designed for the first warp yarn. This represents the error between the actual thickness of the warp yarns and the designed thickness of the first warp yarn. .

[0052] In one embodiment of the present invention, the initial weft yarn layer determination module is configured to perform the following operations: For each interlacing point on the same column of weft yarns, calculate the number of weft yarn layers at each interlacing point in order of increasing thickness; The effective weft yarn thickness at the current interlacing point is obtained by adding the design thickness of the second weft yarn at the current interlacing point to the residual thickness error of the previous interlacing point. Based on the effective weft thickness, weft density, weft specification, and weft bending coefficient, calculate the initial number of weft layers at the current interlacing point; Calculate the actual weft thickness at the current interlacing point based on the initial weft layer number, and use the difference between the effective weft thickness and the actual weft thickness as the thickness residual error, and continue to transfer it to the next interlacing point to calculate the effective weft thickness of the next interlacing point. Repeat the above calculation steps until the initial number of weft yarn layers at each interlacing point is obtained.

[0053] In one embodiment of the present invention, for the first [unclear] on the same column of weft yarns k For each interlacing point, the initial number of weft yarn layers at that interlacing point is calculated using the following formula: For the first k The initial number of weft yarn layers at each interlacing point T k For the first k Effective weft yarn thickness at each interlacing point , For the first k The design thickness of the second weft yarn at each interlacing point R k-1 This is the residual thickness error from the previous interlacing point. γ W This is the weft yarn bending coefficient. M W For weft yarn density, t 0 represents the unit thickness. K W The weft yarn specification indicates the number of yarns in each layer of weft yarn. K W One 1K yarn; The actual thickness of the weft yarn at the current interlacing point is calculated using the following formula. : The residual thickness error at the current interlacing point is calculated using the following formula. R k : R k This represents the residual thickness error at the current interlacing point.

[0054] In one embodiment of the present invention, the yarn twisting module is configured to perform the following operations: Calculate the difference between the initial number of warp layers and the initial number of weft layers; If the difference between the initial number of warp yarn layers and the initial number of weft yarn layers is greater than the difference in the base number of layers, then the excess warp yarns will be plyed. If the difference between the initial number of warp yarn layers and the initial number of weft yarn layers is less than the difference in the base number of layers, then the excess weft yarns will be plyed.

[0055] It is understood that the structures illustrated in the embodiments of this specification do not constitute a specific limitation on a process parameter targeting design device for a three-dimensional woven preform. In other embodiments of this specification, a process parameter targeting design device for a three-dimensional woven preform may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0056] The information interaction and execution process between the modules in the above-mentioned device are based on the same concept as the method embodiments in this specification, and the specific details can be found in the descriptions in the method embodiments in this specification, so they will not be repeated here.

[0057] This specification also provides an electronic device, including a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it implements a method for targeted design of process parameters for a three-dimensional woven preform according to any embodiment of this specification.

[0058] This specification also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform a process parameter targeting design method for a three-dimensional woven preform according to any embodiment of this specification.

[0059] Specifically, a system or apparatus equipped with a storage medium may be provided, on which software program code implementing the functions of any of the embodiments described above is stored, and the computer (or CPU or MPU) of the system or apparatus may read and execute the program code stored in the storage medium.

[0060] In this case, the program code read from the storage medium can itself implement the function of any of the above embodiments, and therefore the program code and the storage medium storing the program code constitute a part of this specification.

[0061] Storage media embodiments for providing program code include floppy disks, hard disks, magneto-optical disks, optical disks (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), magnetic tapes, non-volatile memory cards, and ROMs. Alternatively, program code can be downloaded from a server computer via a communication network.

[0062] Furthermore, it should be clear that not only can the program code read by the computer be executed, but also the operating system or other components operating on the computer can be instructed based on the program code to perform some or all of the actual operations, thereby realizing the function of any of the embodiments described above.

[0063] Furthermore, it is understood that the program code read from the storage medium is written to the memory set in the expansion board inserted into the computer or to the memory set in the expansion module connected to the computer. Then, based on the instructions of the program code, the CPU or other components installed on the expansion board or expansion module execute some and all of the actual operations, thereby realizing the function of any of the above embodiments.

[0064] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0065] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium includes various media that can store program code, such as ROM, RAM, magnetic disk, or optical disk.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this specification, and are not intended to limit them. Although this specification has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this specification.

Claims

1. A method for targeted design of process parameters for a three-dimensional woven preform, characterized in that, include: Based on the total thickness at each interlacing point in the three-dimensional woven prefabricated body model and the ratio of warp stiffness to weft stiffness, the total thickness of the interlacing point is allocated to the thickness of the warp yarn and the thickness of the weft yarn to obtain the first warp yarn design thickness and the first weft yarn design thickness. Based on the design thickness, density and specification of the first warp yarn, calculate the initial number of warp layers at each interlacing point; The actual warp thickness is calculated based on the initial number of warp layers. The error between the actual warp thickness and the first warp design thickness is transferred to the weft thickness to obtain the second weft design thickness. Based on the second weft yarn design thickness, weft yarn density and weft yarn specification, for each interlacing point on the same column of weft yarns, the number of weft yarn layers at each interlacing point is calculated in order of increasing thickness. During the calculation process, the residual thickness error of the current interlacing point is transferred to the layer calculation of the next interlacing point to obtain the initial number of weft yarn layers at each interlacing point. The residual thickness error is the difference between the actual thickness of the weft yarn at each interlacing point and the second weft yarn design thickness. The basic warp yarn layer number and basic weft yarn layer number are obtained according to the woven structure type of each interlacing point. The basic layer difference is obtained based on the difference between the basic warp yarn layer number and the basic weft yarn layer number. Based on the difference between the initial warp yarn layer number and the initial weft yarn layer number and the basic layer difference, the yarn plying scheme at each interlacing point is determined, as well as the target warp yarn layer number and target weft yarn layer number after implementing the plying scheme, so as to complete the process parameter design of the three-dimensional woven preform.

2. The method according to claim 1, characterized in that, The total thickness at each interlacing point in the three-dimensional woven prefabricated model, along with the ratio of warp stiffness to weft stiffness, is used to allocate the total thickness of the interlacing points to the thickness of the warp and weft yarns, resulting in the first warp design thickness and the first weft design thickness. This includes: Based on the total thickness at the interlacing point and the ratio of warp stiffness to weft stiffness, the design thickness of the first weft yarn at the interlacing point is obtained using the following formula: T W The thickness is designed for the first weft yarn. T i,j Intersection point ( i,j The total thickness of the yarn at point ) η s It is the ratio of the longitudinal stiffness to the latitudinal stiffness; Based on the design thickness of the first weft yarn, the design thickness of the first warp yarn is obtained using the following formula: T J The thickness is designed for the first warp yarn.

3. The method according to claim 1, characterized in that, The initial number of warp layers is calculated using the following formula: N J This represents the initial number of warp layers. Indicates rounding down. T J(i,j) Intersection point ( i,j The design thickness of the first warp yarn at point ) γ J The warp coefficient is the bending factor of the warp yarn. M J For warp density, t 0 represents the thickness per unit thickness, indicating the thickness of 1K yarn at the target volume fraction. 1K yarn is yarn containing one thousand fibers. , m 1k The weight of 1cm length of 1K yarn. v fg For the target volume fraction, ρ f Fiber density, K J This refers to the warp yarn specification, indicating the number of warp yarns in each layer. K J 1K yarn.

4. The method according to claim 3, characterized in that, The step of calculating the actual warp thickness based on the initial number of warp layers, and transferring the error between the actual warp thickness and the first warp design thickness to the weft thickness to obtain the second weft design thickness includes: Based on the initial number of warp layers, the actual warp thickness is calculated using the following formula: T d This refers to the actual thickness of the warp yarns. γ J The warp coefficient is the bending factor of the warp yarn. M J For warp density, t 0 represents the unit thickness. N J This represents the initial number of warp layers. K J Specifications for warp yarns; The error between the actual warp thickness and the first warp design thickness is transferred to the weft thickness, and the second weft design thickness is calculated using the following formula: T W,new The thickness is designed for the second weft yarn. T W The thickness is designed for the first weft yarn. T J The thickness is designed for the first warp yarn. This represents the error between the actual thickness of the warp yarns and the designed thickness of the first warp yarn. .

5. The method according to claim 4, characterized in that, Based on the second weft yarn design thickness, weft yarn density, and weft yarn specifications, for each interlacing point on the same column of weft yarns, the number of weft yarn layers at each interlacing point is calculated sequentially in ascending order of thickness. During the calculation process, the residual thickness error of the current interlacing point is transferred to the layer calculation of the next interlacing point, resulting in the initial number of weft yarn layers at each interlacing point, including: For each interlacing point on the same column of weft yarns, calculate the number of weft yarn layers at each interlacing point in order of increasing thickness; The effective weft yarn thickness at the current interlacing point is obtained by adding the design thickness of the second weft yarn at the current interlacing point to the residual thickness error of the previous interlacing point. Based on the effective weft thickness, weft density, weft specification, and weft bending coefficient, calculate the initial number of weft layers at the current interlacing point; Calculate the actual weft thickness at the current interlacing point based on the initial weft layer number, and use the difference between the effective weft thickness and the actual weft thickness as the thickness residual error, and continue to transfer it to the next interlacing point to calculate the effective weft thickness of the next interlacing point. Repeat the above calculation steps until the initial number of weft yarn layers at each interlacing point is obtained.

6. The method according to claim 5, characterized in that, For the first on the same weft yarn k For each interlacing point, the initial number of weft yarn layers at that interlacing point is calculated using the following formula: For the first k The initial number of weft yarn layers at each interlacing point T k For the first k Effective weft yarn thickness at each interlacing point , For the first k The design thickness of the second weft yarn at each interlacing point R k-1 This is the residual thickness error from the previous interlacing point. γ W This is the weft yarn bending coefficient. M W For weft yarn density, t 0 represents the unit thickness. K W The weft yarn specification indicates the number of yarns in each layer of weft yarn. K W One 1K yarn; The actual thickness of the weft yarn at the current interlacing point is calculated using the following formula. : The residual thickness error at the current interlacing point is calculated using the following formula. R k : R k This represents the residual thickness error at the current interlacing point.

7. The method according to claim 1, characterized in that, The step of determining the yarn plying scheme at each interlacing point based on the difference between the initial warp yarn layer number and the initial weft yarn layer number, and the difference in the base layer number, as well as the target warp yarn layer number and target weft yarn layer number after implementing the plying scheme, includes: Calculate the difference between the initial number of warp layers and the initial number of weft layers; If the difference between the initial number of warp yarn layers and the initial number of weft yarn layers is greater than the difference in the base number of layers, then the excess warp yarns will be plyed. If the difference between the initial number of warp yarn layers and the initial number of weft yarn layers is less than the difference in the base number of layers, then the excess weft yarns will be plyed.

8. A device for targeted design of process parameters for a three-dimensional woven preform, characterized in that, include: The yarn thickness allocation module, based on the total thickness at each interlacing point in the three-dimensional woven prefabricated model and the ratio of warp stiffness to weft stiffness, allocates the total thickness of the interlacing point to the thickness of the warp yarn and the thickness of the weft yarn, thereby obtaining the first warp yarn design thickness and the first weft yarn design thickness. The initial warp layer number determination module is connected to the yarn thickness allocation module. Based on the first warp design thickness, warp density and warp specifications, it calculates the initial warp layer number at each interlacing point. The weft yarn design thickness adjustment module is connected to the initial warp yarn layer number determination module. It calculates the actual warp yarn thickness based on the initial warp yarn layer number and transfers the error between the actual warp yarn thickness and the first warp yarn design thickness to the weft yarn thickness to obtain the second weft yarn design thickness. The initial weft yarn layer number determination module is connected to the weft yarn design thickness adjustment module. Based on the second weft yarn design thickness, weft yarn density and weft yarn specification, for each interlacing point on the same column of weft yarns, the number of weft yarn layers at each interlacing point is calculated sequentially in order of thickness from small to large. During the calculation process, the thickness residual error of the current interlacing point is transferred to the layer number calculation of the next interlacing point to obtain the initial weft yarn layer number at each interlacing point. The thickness residual error is the difference between the actual thickness of the weft yarn at each interlacing point and the second weft yarn design thickness. The yarn plying module, connected to the initial weft yarn layer determination module, obtains the basic warp yarn layer number and basic weft yarn layer number based on the weaving structure type of each interlacing point. Based on the difference between the basic warp yarn layer number and the basic weft yarn layer number, it obtains the basic layer difference. Based on the difference between the initial warp yarn layer number and the initial weft yarn layer number, as well as the basic layer difference, it determines the yarn plying scheme at each interlacing point, and the target warp yarn layer number and target weft yarn layer number after executing the plying scheme, so as to complete the process parameter design of the three-dimensional woven preform.

9. An electronic device, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed in a computer, causes the computer to perform the method described in any one of claims 1-7.

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