Titanium alloy strap with corner reinforcing ribs and optimization design method thereof

Abstract

The invention relates to a titanium alloy strap with corner reinforcing ribs and an optimization design method of the titanium alloy strap. The titanium alloy strap with the corner reinforcing ribs comprises a bending part, a reinforcing part and a connecting part, the locking part comprises a first straight part, a second straight part and a lock hole, the first straight part and the second straight part are connected through the bending part, the first straight part can be attached to the second straight part, and the lock hole penetrates through the first straight part and the second straight part; the corner part is located between the bending part and the first straight part and / or the second straight part, and a hoop space is defined by the bending part and the corner part and used for containing a structural part; and the reinforcing ribs are arranged at the corner parts and are used for reinforcing the fatigue strength of the titanium alloy strap with the corner reinforcing ribs. The titanium alloy strap with the corner reinforcing ribs has better fatigue tensile property.

Description

Technical Field

[0001] The present disclosure relates to the field of aerospace technology, and particularly to a titanium alloy hoop with corner stiffeners. Background Art

[0002] In the field of aerospace technology, aerospace engine pipelines are usually fixed to the airframe or casing structure by hoops. Most of the currently used hoops are made of stainless steel. However, the hoops made of stainless steel are relatively heavy.

[0003] Moreover, the currently used hoops have poor fatigue tensile properties. When subjected to alternating loads, they are prone to fatigue cracks, resulting in problems such as hoop fracture and failure.

[0004] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure. Therefore, it may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0005] The purpose of the present disclosure is to provide a titanium alloy hoop with corner stiffeners and its optimized design method. The titanium alloy hoop with corner stiffeners has good fatigue tensile properties.

[0006] On the one hand, the present disclosure provides a titanium alloy hoop with corner stiffeners, including:

[0007] A bent portion;

[0008] A locking portion, including: a first straight portion, a second straight portion, and a locking hole. The first straight portion and the second straight portion are connected by the bent portion. The first straight portion can be attached to the second straight portion. The locking hole penetrates through the first straight portion and the second straight portion;

[0009] A corner portion located between the bent portion and the first straight portion and / or the second straight portion. The bent portion and the corner portion enclose a clamping space for accommodating structural members;

[0010] Reinforcing ribs are provided on the corner portion to enhance the fatigue tensile properties of the titanium alloy hoop with corner stiffeners.

[0011] In an exemplary embodiment of the present disclosure, the reinforcing ribs protrude from the surface of the corner portion facing away from the clamping space.

[0012] In an exemplary embodiment of the present disclosure, the center point of the reinforcing ribs in the first direction is located on the center line of the corner portion extending in the second direction;

[0013] Wherein, the first direction is perpendicular to the second direction, the second direction is perpendicular to the third direction, the second direction is the axial direction of the lock hole when the first flat portion is attached to the second flat portion, and the third direction is the direction in which the locking portion points to the bending portion.

[0014] In an exemplary embodiment of the present disclosure, the projection of the reinforcing rib in the third direction is circular or elliptical.

[0015] In an exemplary embodiment of the present disclosure, the reinforcing rib and the corner portion are of an integral structure.

[0016] In an exemplary embodiment of the present disclosure, the reinforcing rib is formed on the corner portion by stamping.

[0017] On the other hand, the present disclosure provides an optimization design method for a titanium alloy hoop with corner reinforcement. The optimization design method for the titanium alloy hoop with corner reinforcement is used to optimize the titanium alloy hoop with corner reinforcement described in any one of the above, and the optimization design method for the titanium alloy hoop with corner reinforcement includes:

[0018] Construct a tensile model of the titanium alloy hoop with corner reinforcement, and obtain the optimization objective function of the titanium alloy hoop with corner reinforcement;

[0019] Select the design variables that need to be optimized for the titanium alloy hoop with corner reinforcement, and set the initial range for each of the design variables;

[0020] Select an optimization design algorithm, and set the algorithm parameters of the optimization design algorithm;

[0021] According to the optimization objective function of the titanium alloy hoop with corner reinforcement, the initial ranges of each of the design variables, and the optimization design algorithm, optimize the titanium alloy hoop with corner reinforcement to obtain the optimization design results of each of the design variables;

[0022] Verify the optimization design results; when the verification result meets the preset requirements, the optimization design results of each of the design variables are the final optimization design results; when the verification result does not meet the preset requirements, re-execute the above steps;

[0023] Design the titanium alloy hoop with corner reinforcement according to the final optimization design results.

[0024] In an exemplary embodiment of the present disclosure, the obtaining of the optimization objective function of the titanium alloy hoop with corner reinforcement includes:

[0025] Obtain the maximum equivalent stress and mean stress of the tensile model of the titanium alloy hoop with corner stiffeners in the second direction;

[0026] Obtain the maximum equivalent stress and mean stress of the tensile model of the titanium alloy hoop with corner stiffeners in the third direction;

[0027] Construct an optimization objective function for the titanium alloy hoop with corner stiffeners according to the maximum equivalent stress and mean stress of the tensile model of the titanium alloy hoop with corner stiffeners in the second direction and the third direction;

[0028] Wherein, the second direction is the axial direction of the lock hole when the first straight portion is attached to the second straight portion, and the third direction is the direction in which the locking portion points to the bending portion.

[0029] In an exemplary embodiment of the present disclosure, the optimization design algorithm is a multi-objective genetic algorithm, and the algorithm parameters include: the initial sample number and the iterative sample number; the titanium alloy hoop with corner stiffeners is optimized according to the optimization objective function of the titanium alloy hoop with corner stiffeners, the initial range of each design variable, and the optimization design algorithm to obtain the optimized design results of each design variable, including:

[0030] Set the minimum value of the maximum equivalent stress and mean stress of the tensile model of the titanium alloy hoop with corner stiffeners in the second direction and the third direction as the target constraint;

[0031] According to the optimization objective function, the initial range of each design variable, the target constraint, the initial sample number, the iterative sample number and the number of iterations of the multi-objective genetic algorithm, use the multi-objective genetic algorithm to optimize the titanium alloy hoop with corner stiffeners to obtain the optimized design results of each design variable.

[0032] In an exemplary embodiment of the present disclosure, the stiffeners are formed at the corner portions by stamping; the design variables include:

[0033] The stamping radius of the stiffeners, the stamping depth of the stiffeners, and the fillet radius between the stiffeners and the corner portions.

[0034] The technical solution provided by the present disclosure can achieve the following beneficial effects:

[0035] The present disclosure provides a titanium alloy hoop with corner stiffeners. The titanium alloy hoop with corner stiffeners is made of titanium alloy material. Compared with the prior art, it has a lighter mass and can meet the requirements of aircraft lightweight. Moreover, the titanium alloy hoop has high strength, which can ensure good fatigue tensile performance, reduce the probability of generating cracks under alternating loads, and thus reduce the probability of fracture failure.

[0036] Meanwhile, for the titanium alloy hoop with corner stiffeners provided by the present disclosure, stiffeners are arranged at the corner positions, which can further improve the fatigue tensile performance of the titanium alloy hoop with corner stiffeners by using the stiffeners, thereby further reducing the probability of generating cracks under alternating loads, and further reducing the probability of fracture failure.

[0037] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0039] Figure 1 FIG. 15 shows a schematic structural diagram of a titanium alloy hoop with corner stiffeners from a first perspective according to an exemplary embodiment of the present disclosure;

[0040] Figure 2 FIG. 19 shows a schematic structural diagram of a titanium alloy hoop with corner stiffeners from a second perspective according to an exemplary embodiment of the present disclosure;

[0041] Figure 3 FIG. 23 shows a schematic structural diagram of a tensile model of a titanium alloy hoop with corner stiffeners from a first perspective according to an exemplary embodiment of the present disclosure;

[0042] Figure 4 FIG. 27 shows a schematic structural diagram of a tensile model of a titanium alloy hoop with corner stiffeners from a second perspective according to an exemplary embodiment of the present disclosure;

[0043] Figure 5 FIG. 31 shows a schematic flow diagram of an optimization design method for an exemplary titanium alloy hoop with corner stiffeners according to the present disclosure.

[0044] DESCRIPTION OF REFERENCE NUMERALS:

[0045] 1. Bent portion; 2. Locking portion; 21. First straight portion; 22. Second straight portion; 23. Locking hole; 3. Corner portion; 4. Reinforcing rib; 5. Clamp space; 6. Mandrel; 7. Metal washer;

[0046] X. First direction; Y. Second direction; Z. Third direction. Detailed implementation manners

[0047] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their detailed descriptions will be omitted.

[0048] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification only for convenience, for example, according to the directions of the examples described in the accompanying drawings. It can be understood that if the device of the icon is turned upside down, the component described as "upper" will become the component described as "lower". When a structure is "on" another structure, it may mean that a structure is integrally formed on another structure, or that a structure is "directly" disposed on another structure, or that a structure is "indirectly" disposed on another structure through another structure.

[0049] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to mean an open inclusion and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc.; the terms "first" and "second", etc. are used only as labels and are not a limitation on the quantity of their objects.

[0050] The present disclosure first provides a titanium alloy hoop with corner reinforcement. The titanium alloy hoop with corner reinforcement can be used to restrain pipelines in an aircraft and fix the pipelines in the aircraft to the airframe or casing structure. However, it is not limited thereto. The titanium alloy hoop with corner reinforcement can also be used in other fields, for example: it can also be used for clamping and fixing wire harnesses, etc.

[0051] As Figures 1 to 2As shown, the titanium alloy hoop with corner stiffening provided by the present disclosure may include: a bending portion 1, a locking portion 2, a corner portion 3, and a reinforcing rib 4. Among them, the bending portion 1 may be a partial annular structure. The locking portion 2 may include: a first straight portion 21, a second straight portion 22, and a locking hole. The first straight portion 21 and the second straight portion 22 may be connected through the bending portion 1, and the first straight portion 21 can be fitted with the second straight portion 22. The locking hole may penetrate through the first straight portion 21 and the second straight portion 22, and a locking member may pass through the locking hole to fix the titanium alloy hoop with corner stiffening to the fuselage or the casing structure, thereby realizing the fixation of the pipeline.

[0052] The corner portion 3 may be located between the bending portion 1 and the first straight portion 21 and / or the second straight portion 22. For example: the corner portion 3 may be located between the bending portion 1 and the first straight portion 21, or the corner portion 3 may be located between the bending portion 1 and the second straight portion 22, or the corner portion 3 may be provided between the bending portion 1 and both the first straight portion 21 and the second straight portion 22. By providing the corner portion 3, the transition between the bending portion 1 and the first straight portion 21 and / or the second straight portion 22 can be made smoother, the concentrated stress at the connection between the bending portion 1 and the first straight portion 21 and / or the second straight portion 22 can be reduced, and the fatigue tensile performance of the titanium alloy hoop with corner stiffening can be improved. The bending portion 1 and the corner portion 3 may enclose a clamp space 5 for accommodating structural members, such as: for accommodating a mandrel 6, a metal washer 7, or pipeline and other structural members in an aircraft.

[0053] The reinforcing rib 4 may be provided on the corner portion 3, and the reinforcing rib 4 can be used to enhance the fatigue tensile performance of the titanium alloy hoop with corner stiffening.

[0054] The titanium alloy hoop with corner stiffening is made of titanium alloy material. Compared with the prior art, it has a lighter mass and can meet the requirements of aircraft lightweight. Moreover, the titanium alloy hoop has a higher strength, which can ensure its better fatigue tensile performance, reduce the probability of generating cracks under alternating loads, and thus reduce the probability of fracture failure.

[0055] At the same time, for the titanium alloy hoop with corner stiffening provided by the present disclosure, a reinforcing rib 4 is provided at the position of the corner portion 3, which can further improve the fatigue tensile performance of the titanium alloy hoop with corner stiffening by using the reinforcing rib 4, thereby further reducing the probability of generating cracks under alternating loads, and further reducing the probability of fracture failure.

[0056] In an embodiment of the present disclosure, the reinforcing rib 4 may protrude from the side of the corner portion 3 facing away from the clamping space 5. With such a setting, it is possible to prevent the reinforcing rib 4 from occupying the clamping space 5 and reducing the inner diameter of the clamping space 5, and it can ensure that the clamping space 5 can clamp a pipeline with a larger diameter. At the same time, with such a setting, it is also possible to prevent damage to the pipeline when the titanium alloy hoop with corner reinforcement clamps the pipeline.

[0057] The center point of the reinforcing rib 4 in the first direction X may be located on the center line of the corner portion 3 extending in the second direction Y. Wherein, the first direction X may be perpendicular to the second direction Y, and the second direction Y may be perpendicular to the third direction Z; the second direction Y may be the axial direction of the locking hole 23 when the first straight portion 21 is attached to the second straight portion 22; the third direction Z may be the direction from the locking portion 2 to the bending portion 1. That is, it can be understood that in this embodiment, the reinforcing rib 4 may be located at the central position of the corner portion 3 in the first direction X. With such a setting, the fatigue tensile performance of the reinforcing rib 4 can be further improved, the stress value at the key position of the titanium alloy hoop with corner reinforcement can be further reduced, thereby the probability of generating cracks under alternating loads can be further reduced, and further the probability of its fracture failure can be further reduced.

[0058] In an embodiment, the projection of the reinforcing rib 4 in the third direction Z may be circular or elliptical. Since the circular or elliptical structure has strong force uniformity. Therefore, through the above setting in this embodiment, the bearing capacity of the reinforcing rib 4 can be improved, and the strengthening effect of the reinforcing rib 4 on the overall titanium alloy hoop structure can be further improved. However, it is not limited thereto, and the projection of the reinforcing rib 4 in the third direction Z may also be other shapes, and it can also be selected and set according to actual needs, which are all within the protection scope of the present disclosure.

[0059] In an embodiment, the reinforcing rib 4 and the corner portion 3 may be an integral structure, that is: the reinforcing rib 4 and the corner portion 3 may be integrally formed by an integral process, and it is not necessary to connect the reinforcing rib 4 and the corner portion 3 together by connection methods such as welding, riveting, and screw connection. In this way, the connection points between the reinforcing rib 4 and the corner portion 3 can be reduced, thereby the connection strength between the reinforcing rib 4 and the corner portion 3 can be improved, and further the structural strengthening effect of the reinforcing rib 4 can be ensured.

[0060] The reinforcing rib 4 may be formed with the corner portion 3 by stamping, that is: the reinforcing rib 4 may be a part of the corner portion 3. With such a setting, while ensuring the structural strengthening effect of the reinforcing rib 4, adding a strengthening structure on the corner portion 3 can be avoided, and further the weight of the titanium alloy hoop with corner reinforcement can be reduced.

[0061] In this embodiment, the reinforcing rib 4 may have three design variables: a stamping radius R of the reinforcing rib 4 , a stamping depth D of the reinforcing rib 4 , and a fillet radius r between the reinforcing rib 4 and the corner portion 3 .

[0062] The stamping radius R of the rib 4 refers to the cross-sectional profile radius of the rib 4. The stamping radius R of the rib 4 is a design variable that is critical to the processing and structural strength of the rib 4. A smaller stamping radius R may cause stress concentration inside the rib 4, reducing the bending and tensile strength of the rib 4. A larger stamping radius R may result in a poor structural reinforcement effect of the rib 4.

[0063] In this embodiment, the stamping radius R of the reinforcing rib 4 can be 0.5 mm. Such a setting helps material flow, reduces defects that may occur during the forming process, and ensures that the reinforcing rib 4 can have a good structural strengthening effect on the titanium alloy hoop with corner reinforcement.

[0064] The punching depth D of the reinforcing rib 4 refers to the distance that the reinforcing rib 4 protrudes from the side of the corner portion 3 close to the clamp space 5 to the side of the corner portion 3 away from the clamp space 5 .

[0065] In this embodiment, the punching depth D of the reinforcing rib 4 may be 1.25 mm. This arrangement can effectively improve the bearing capacity of the reinforcing rib 4.

[0066] In the stamping process, the fillet radius r between the reinforcing rib 4 and the corner portion 3 directly affects the edge quality and shape accuracy of the final product. If the fillet radius r between the reinforcing rib 4 and the corner portion 3 is too small, the reinforcing rib 4 may crack during stamping, while if the fillet radius r is too large, the stamping effect may be unsatisfactory and increase material waste.

[0067] In this embodiment, the fillet radius r between the reinforcing rib 4 and the corner portion 3 may be 2.3 mm. This arrangement can improve the stability when punching the reinforcing rib 4, reduce burrs and deformation during the punching process, and improve the quality of the reinforcing rib 4 finally formed.

[0068] On the other hand, the present disclosure provides an optimization design method for a titanium alloy hoop with corner reinforcement, and the optimization design method can be used to optimize the design of the titanium alloy hoop with corner reinforcement described above.

[0069] It should be noted that, since the specific structure and beneficial effects of the titanium alloy hoop with corner reinforcement have been described in detail in the previous topic of the present disclosure, the specific structure and beneficial effects of the titanium alloy hoop with corner reinforcement will not be described in detail in this topic, and the above description can be referred to, which is also within the protection scope of the present disclosure.

[0070] likeFigures 1 to 5 As shown, the optimization design method of the titanium alloy hoop with corner stiffeners provided by the present disclosure may include:

[0071] Step S10: Construct a tensile model of the titanium alloy hoop with corner stiffeners, and obtain the optimization objective function of the titanium alloy hoop with corner stiffeners.

[0072] Step S20: Select the design variables to be optimized for the titanium alloy hoop with corner stiffeners, and set the initial ranges for each design variable.

[0073] Step S30: Select an optimization design algorithm and set the algorithm parameters of the optimization design algorithm.

[0074] Step S40: Optimize the design of the titanium alloy hoop with corner stiffeners according to the optimization objective function of the titanium alloy hoop with corner stiffeners, the initial ranges of each design variable, and the optimization design algorithm, so as to obtain the optimization design results of each design variable.

[0075] Step S50: Verify the optimization design results; when the verification results meet the preset requirements, the optimization design results of each design variable are the final optimization design results; when the verification results do not meet the preset requirements, re - execute the above steps.

[0076] Step S60: Design the titanium alloy hoop with corner stiffeners according to the final optimization design results.

[0077] The optimization design method of the titanium alloy hoop with corner stiffeners provided by the present disclosure uses an optimization design algorithm to optimize the selected optimization design variables, which can ensure that the selected design variables are optimal values, thereby improving the performance of the finally designed titanium alloy hoop with corner stiffeners and ensuring that the finally designed titanium alloy hoop with corner stiffeners can have good fatigue tensile performance.

[0078] In step S10, a tensile model of the titanium alloy hoop with corner stiffeners can be constructed, and the tensile model can be processed to cut the collector, remove the redundant edges, and check whether there are missing faces in the established tensile model. For example, a finite element software can be used to construct the tensile model of the titanium alloy hoop with corner stiffeners, but it is not limited to this.

[0079] Furthermore, the maximum equivalent stress and the average stress of the titanium alloy hoop with corner stiffeners in the second direction Y can be obtained. The maximum equivalent stress and the average stress of the titanium alloy hoop with corner stiffeners in the third direction Z can be obtained. The optimization objective function of the titanium alloy hoop with corner stiffeners can be constructed according to the maximum equivalent stress and the average stress of the titanium alloy hoop with corner stiffeners in the second direction Y and the third direction Z.

[0080] In step S20, the design variables to be optimized for the titanium alloy hoop with corner stiffeners can be selected, and an initial range can be set for each design variable. Among them, when the stiffener 4 is formed at the corner 3 by stamping, the above design variables can include: the stamping radius R of the stiffener 4, the stamping depth D of the stiffener 4, and the fillet radius r between the stiffener 4 and the corner 3. However, it is not limited to this, and the design variables of the stiffener 4 can also be other variables.

[0081] In step S30, an optimization design algorithm can be selected, and the algorithm parameters of the optimization design algorithm can be set. For example: the optimization design algorithm can be a multi-objective genetic algorithm, and the algorithm parameters can include: the initial sample number and the iterative sample number. However, it is not limited to this, and the optimization design method can also be other optimization design algorithms, which can be selected and set according to the actual situation.

[0082] In step S40, the minimum value among the maximum equivalent stress and the average stress of the tensile model of the titanium alloy hoop with corner stiffeners in the second direction Y and the third direction Z can be set as the target constraint. According to the optimization objective function, the initial range of each design variable, the target constraint, the initial sample number of the multi-objective genetic algorithm, the iterative sample number, and the number of iterations, the titanium alloy hoop with corner stiffeners can be optimized by using the multi-objective genetic algorithm to obtain the optimized design results of each design variable.

[0083] However, it is not limited to this, and the optimization target constraint can also be the maximum equivalent stress and / or the average stress of other structural surfaces or structures, which are all within the protection scope of the present disclosure and can be selected and set according to the actual situation.

[0084] In step S50, the optimized design results can be verified. For example: the optimized design results can be verified by simulation, comparison, and sensitivity analysis, etc.

[0085] When the verification result meets the preset requirements, the optimized design results of each design variable can be the final optimized design results. At this time, the final titanium alloy hoop with corner stiffeners can be designed by using this optimized result.

[0086] When the verification result does not meet the preset requirements, the above steps need to be executed again. That is: steps S10, S20, S30, S40, and S50 need to be executed again in sequence until the final optimized result meets the requirements.

[0087] The above optimization design method of the titanium alloy hoop with corner stiffeners will be further explained below through specific embodiments.

[0088] A tensile model of a titanium alloy hoop with corner stiffeners can be established using finite element software, and the model can be processed in the finite element software to cut the geometric structure and remove the redundant edges. The titanium alloy hoop with corner stiffeners can be set as a shell element to reduce the number of elements. However, when setting the titanium alloy hoop with corner stiffeners as a shell element, it is necessary to check whether there are missing faces in the established model.

[0089] Appropriate material parameters can be assigned to the tensile model of the titanium alloy hoop with corner stiffeners. Among them, the material used for the titanium alloy hoop with corner stiffeners is titanium alloy, with a density of 4150 Kg / m³. -3 The elastic modulus is 107800 MPa, and the Poisson's ratio is 0.34. The material of the metal washer 7 in the tensile model uses stainless steel, with a density of 7850 Kg / m³. -3 The elastic modulus is 10 MPa, and the Poisson's ratio is 0.3. The material of the mandrel 6 uses stainless steel, with a density of 7850 Kg / m³. -3 The elastic modulus is 200 MPa, and the Poisson's ratio is 0.3.

[0090] The tensile model of the titanium alloy hoop with corner stiffeners can be meshed, and contact constraints can be set for each structural member. The contact between the titanium alloy hoop with corner stiffeners and the mandrel 6 can be set as frictionless contact, and the two locking holes 23 of the titanium alloy hoop with corner stiffeners can be fixed. A 1-mm static tensile analysis in the second direction Y and the third direction Z can be performed on the tensile model of the titanium alloy hoop with corner stiffeners, and the maximum equivalent stress and average stress of the titanium alloy hoop with corner stiffeners after stretching can be exported to jointly construct an optimization objective function with the above various parameters.

[0091] The design variables can be selected. The selected design variables are: the stamping radius R of the stiffener 4, the stamping depth D of the stiffener 4, and the fillet radius r between the stiffener 4 and the corner part 3. Among them, the initial range of the stamping radius R of the stiffener 4 can be set from 1.55 mm to 2.5 mm. The initial range of the stamping depth D of the stiffener 4 can be set from 0.5 mm to 1.5 mm. The initial range of the fillet radius r between the stiffener 4 and the corner part 3 can be set from 0.5 mm to 0.95 mm.

[0092] The multi-objective genetic algorithm can be selected as the optimization algorithm, and the initial sample size can be selected as 100, and the iterative sample size can be 50. The objective constraints can be set according to the maximum equivalent stress and average stress of the titanium alloy hoop strip with corner stiffeners after stretching. Based on the above various parameters and objective functions, the multi-objective genetic algorithm can be used for iterative optimization calculation, which converges after 384 iterations. The final optimized design results are that the stamping radius R of the stiffener 4 is 2.3 mm, the stamping depth D of the stiffener 4 is 1.25 mm, and the fillet radius r between the stiffener 4 and the corner part 3 is 0.5 mm.

[0093] Using simulation, the above optimization results are verified. When the titanium alloy hoop strip with corner stiffeners is stretched in the second direction Y, the average stress at the edge of the locking hole 23 of the fatigue source metal hoop strip is 93.9 Mpa. When the metal hoop strip without the stiffener 4 is stretched in the second direction Y, the average stress at the edge of the locking hole 23 of the fatigue source metal hoop strip is 124.1 Mpa. It can be seen that the above optimization design results meet the requirements. When the titanium alloy hoop strip with corner stiffeners designed according to the optimization design results is stretched in the second direction Y, the average stress is reduced by 24.3%.

[0094] Moreover, through simulation, when the titanium alloy hoop strip with corner stiffeners is stretched in the second direction Y, the maximum stress at the edge of the locking hole 23 of the fatigue source metal hoop strip is 548.7 Mpa. When the metal hoop strip without the stiffener 4 is stretched in the second direction Y, the maximum stress at the edge of the locking hole 23 of the fatigue source metal hoop strip is 850.7 Mpa. It can be seen that the above optimization design results meet the requirements. When the titanium alloy hoop strip with corner stiffeners designed according to the optimization design results is stretched in the second direction Y, the maximum stress is reduced by 35.5%.

[0095] When the titanium alloy hoop strip with corner stiffeners is stretched in the third direction Z, the average stress at the corner section of the fatigue source hoop strip is 113 Mpa. When the metal hoop strip without the stiffener 4 is stretched in the third direction Z, the average stress at the corner section of the fatigue source hoop strip is 129 Mpa. It can be seen that the above optimization design results meet the requirements. When the titanium alloy hoop strip with corner stiffeners designed according to the optimized design structure is stretched in the third direction Z, the average stress is reduced by 12.4%.

[0096] Moreover, through simulation, when the titanium alloy hoop with corner stiffeners is subjected to tensile stress in the third direction Z, the maximum stress at the edge of the locking hole 23 of the fatigue source metal hoop is less than 300 Mpa. When the metal hoop without the stiffener 4 is subjected to tensile stress in the third direction Z, the maximum stress at the edge of the locking hole 23 of the fatigue source metal hoop is 422 Mpa. It can be seen that the above optimization design results meet the requirements. When the titanium alloy hoop with corner stiffeners designed according to the optimization design results is subjected to tensile stress in the third direction Z, the maximum stress is reduced by at least 29%.

[0097] After considering the specification and practicing the invention disclosed herein, those skilled in the art will readily conceive of other embodiments of the present disclosure. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only illustrative, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

Claims

1. A titanium alloy hoop with corner stiffeners, characterized in that, Comprising: A bent portion; A locking portion, including: a first straight portion, a second straight portion, and a locking hole. The first straight portion is connected to the second straight portion through the bent portion. The first straight portion can be attached to the second straight portion, and the locking hole penetrates through the first straight portion and the second straight portion; A corner portion located between the bent portion and the first straight portion and / or the second straight portion. The bent portion and the corner portion enclose a clamping space for accommodating a structural member; Reinforcing ribs are provided on the corner portion to enhance the fatigue tensile performance of the titanium alloy hoop with corner reinforcements.

2. The titanium alloy hoop with corner stiffeners according to claim 1, characterized in that, The reinforcing ribs protrude from a surface of the corner portion facing away from the clamping space.

3. The titanium alloy hoop with corner stiffeners according to claim 2, characterized in that, The center point of the reinforcing ribs in the first direction is located on the center line of the corner portion extending in the second direction; Wherein, the first direction is perpendicular to the second direction, the second direction is perpendicular to the third direction. The second direction is the axial direction of the locking hole when the first straight portion is attached to the second straight portion, and the third direction is the direction in which the locking portion points to the bent portion.

4. The titanium alloy hoop strap with corner stiffeners according to claim 3, characterized in that The projection of the reinforcing ribs in the third direction is circular or elliptical.

5. The titanium alloy hoop band with corner stiffeners according to any one of claims 2 to 4, characterized in that, The reinforcing ribs and the corner portion are of an integral structure.

6. The titanium alloy hoop band with corner stiffening according to claim 5, wherein The reinforcing ribs are formed on the corner portion by stamping.

7. An optimized design method for a titanium alloy hoop with corner stiffeners, characterized in that, The optimization design method of the titanium alloy hoop with corner reinforcements is used to optimize the titanium alloy hoop with corner reinforcements described in any one of claims 1 to 6 above. The optimization design method of the titanium alloy hoop with corner reinforcements includes: Constructing a tensile model of the titanium alloy hoop with corner reinforcements and obtaining an optimization objective function of the titanium alloy hoop with corner reinforcements; Selecting design variables that need to be optimized for the titanium alloy hoop with corner reinforcements and setting initial ranges for each of the design variables; Selecting an optimization design algorithm and setting algorithm parameters of the optimization design algorithm; According to the optimization objective function of the titanium alloy hoop with corner reinforcements, the initial ranges of each of the design variables, and the optimization design algorithm, optimizing the design of the titanium alloy hoop with corner reinforcements to obtain optimization design results for each of the design variables; Verifying the optimization design results; when the verification results meet the preset requirements, the optimization design results of each of the design variables are the final optimization design results; when the verification results do not meet the preset requirements, re-execute the above steps; Designing the titanium alloy hoop with corner reinforcements according to the final optimization design results.

8. The optimized design method of the titanium alloy hoop with corner stiffeners according to claim 7, characterized in that, The obtaining of the optimization objective function of the titanium alloy hoop with corner reinforcements includes: Obtaining the maximum equivalent stress and average stress of the tensile model of the titanium alloy hoop with corner reinforcements in the second direction; Obtaining the maximum equivalent stress and average stress of the tensile model of the titanium alloy hoop with corner reinforcements in the third direction; Constructing an optimization objective function of the titanium alloy hoop with corner reinforcements according to the maximum equivalent stress and average stress of the tensile model of the titanium alloy hoop with corner reinforcements in the second direction and the third direction. Wherein, the second direction is the axial direction of the lock hole when the first flat part is attached to the second flat part, and the third direction is the direction in which the locking part points to the bent part.

9. The optimized design method of the titanium alloy hoop with corner stiffeners according to claim 8, characterized in that, The optimization design algorithm is a multi-objective genetic algorithm, and the algorithm parameters include: the number of initial samples and the number of iterative samples; optimizing the titanium alloy hoop with corner stiffeners according to the optimization objective function of the titanium alloy hoop with corner stiffeners, the initial ranges of the design variables, and the optimization design algorithm to obtain the optimized design results of the design variables, including: Setting the minimum value of the maximum equivalent stress and the average stress of the tensile model of the titanium alloy hoop with corner stiffeners in the second direction and the third direction as the target constraint; According to the optimization objective function, the initial ranges of the design variables, the target constraint, the number of initial samples, the number of iterative samples and the number of iterations of the multi-objective genetic algorithm, using the multi-objective genetic algorithm to optimize the titanium alloy hoop with corner stiffeners to obtain the optimized design results of the design variables.

10. The optimized design method of the titanium alloy hoop with corner stiffeners according to any one of claims 7 to 9, characterized in that, The stiffeners are formed at the corner by stamping; the design variables include: The stamping radius of the stiffeners, the stamping depth of the stiffeners, and the fillet radius between the stiffeners and the corner.

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