A design system and method for improving the mode of spare tire groove of automobile

Abstract

The present invention discloses a design system and method for improving the mode of a spare tire groove of an automobile, which includes an initial model construction module, a partitioning module, a morphology analysis module, a morphology optimization module, a modal analysis module and a morphology re-optimization module. The present invention optimizes the morphology of the spare tire groove model by partitioning, fully considers the process feasibility, and optimizes and generates the best direction of the reinforcement ribs. The local structure of the spare tire groove model is strengthened and optimized by the calculated modal strain energy to generate a final optimization scheme. The target achievement efficiency of the spare tire groove mode is greatly improved, and the optimal feasible arrangement scheme of the reinforcement ribs of the spare tire groove is realized.

Description

Technical Field

[0001] The invention relates to the technical field of automobile design and manufacturing, and in particular to a design system and method for improving the mode of a spare tire groove of an automobile. Background Art

[0002] The size of the spare tire groove of a car is generally large, and the overall structure is stamped from metal sheet metal. Unreasonable design can easily produce local low-order modes, causing resonance, leading to noise and cracking problems. The current optimization design scheme for the spare tire groove mainly includes the following aspects: 1. According to the experience of designers, characteristic reinforcement ribs are arranged in the spare tire groove to improve the local mode of the spare tire groove, but if there is insufficient experience, the reinforcement ribs will be arranged unreasonable, affecting the performance. 2. Directly refer to the design structure of previous models or benchmark models on the market to design the spare tire groove, but due to differences in the length, width, depth, thickness, etc. of the spare tire groove, there is a structural mismatch problem, resulting in the subsequent performance not being able to achieve the ideal effect. 3. Add a reinforced structure to the spare tire groove. Generally, a crossbeam reinforcement plate is added to the bottom of the spare tire groove to strengthen the local structural overlap and improve the local mode. However, since the structural characteristics of the spare tire groove are not fully utilized, it is not conducive to lightweight design, and additional reinforcements need to be added. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned background technology and to provide a reasonable and effective design system and method for improving the mode of the spare tire groove of an automobile.

[0004] To achieve this purpose, the design system for improving the mode of the spare tire groove of an automobile designed in the present invention is characterized in that: it includes an initial model building module, a partitioning module, a morphology analysis module, a morphology optimization module, a modal analysis module and a morphology re-optimization module;

[0005] The initial model building module is used to build an initial model of the spare tire groove;

[0006] The partition module is used to partition the initial model of the spare tire groove according to the structural characteristics and determine the reinforcing rib structural characteristics of each partition;

[0007] The morphology analysis module is used to perform working condition analysis on the initial model of the spare tire groove to obtain the modal vibration frequency of the initial model of the spare tire groove;

[0008] The morphology optimization module is used to set the reinforcement rib process parameters of each partition according to the reinforcement rib structural characteristics of each partition and the modal vibration frequency of the initial model of the spare tire groove, generate the reinforcement rib structure of each partition, and form an optimized spare tire groove model with the reinforcement rib structure;

[0009] The modal analysis module is used to perform modal strain energy analysis on the optimized spare tire groove model to determine the concentrated area of ​​modal strain energy;

[0010] The shape re-optimization module is used to generate a reinforcing rib structure in a concentrated area of ​​modal strain energy to form a re-optimized spare tire groove model.

[0011] Furthermore, the method in which the initial model building module is used to build the initial model of the spare tire well is: according to the size of the spare tire well, the parameters of the initial geometric model of the spare tire well are set to generate the initial model of the spare tire well.

[0012] Furthermore, the partitioning module is used to partition the initial model of the spare tire groove according to the structural characteristics in a method of: dividing the initial model of the spare tire groove into at least three areas according to the reinforcement rib arrangement characteristics of the initial model of the spare tire groove.

[0013] Furthermore, the initial model of the spare tire groove includes a first plane area where reinforcing ribs can be freely arranged; a second plane area composed of a circular ring and a rectangular splicing surface where annular reinforcing ribs can be arranged; and a third plane area composed of a circular and a rectangular splicing surface where circular and rectangular reinforcing ribs can be arranged.

[0014] Furthermore, the morphology analysis module is used to perform working condition analysis on the initial model of the spare tire groove, and the method for obtaining the modal vibration frequency of the initial model of the spare tire groove is: performing working condition analysis on the initial model of the spare tire groove to obtain the first-order modal vibration frequency and the second-order modal vibration frequency of the initial model of the spare tire groove.

[0015] Furthermore, the morphology optimization module is used to set the reinforcement process parameters of each partition according to the reinforcement structure characteristics of each partition and the modal vibration frequency of the initial model of the spare tire groove, generate the reinforcement structure of each partition, and form an optimized spare tire groove model with a reinforcement structure. The method is: calculate the maximum value that the first-order modal vibration frequency and the maximum value that the second-order modal vibration frequency of the initial model of the spare tire groove can reach, set the reinforcement process parameters of each planar area according to the reinforcement structure characteristics of each partition, determine the reinforcement layout position and shape of each planar area, so that the first-order modal vibration frequency and the second-order modal vibration frequency of the initial model of the spare tire groove arranged with reinforcement are maximized.

[0016] Furthermore, the modal analysis module is used to perform modal strain energy analysis on the optimized spare tire groove model, and the method for determining the concentrated area of ​​modal strain energy is: respectively calculating the modal strain energy of each plane area and the modal strain energy of the annular vertical connection area between two adjacent plane areas, and determining the concentrated area of ​​modal strain energy.

[0017] Furthermore, the concentrated area of ​​the modal strain energy includes the annular facade connection area.

[0018] Furthermore, the morphology re-optimization module is used to generate a reinforcing rib structure in an area where modal strain energy is concentrated, and a method for forming a re-optimized spare tire groove model is: a plurality of vertical reinforcement ribs are arranged at intervals along the annular direction of the annular vertical connection area, so that the modal strain energy of the annular vertical connection area is the same as the lowest modal strain energy of each planar area.

[0019] Still further, a design method for improving the mode of a spare tire groove of an automobile is characterized in that it comprises the following steps:

[0020] Step 1: Construct the initial model of the spare tire slot;

[0021] Step 2: partition the initial model of the spare tire groove according to the structural characteristics, and determine the structural characteristics of the reinforcement ribs of each partition;

[0022] Step 3: Perform working condition analysis on the initial model of the spare tire groove to obtain the modal vibration frequency of the initial model of the spare tire groove;

[0023] Step 4: according to the structural characteristics of the reinforcement ribs of each partition and the modal vibration frequency of the initial model of the spare tire groove, the reinforcement rib process parameters of each partition are set, the reinforcement rib structure of each partition is generated, and the optimized spare tire groove model with the reinforcement rib structure is formed;

[0024] Step 5: Perform modal strain energy analysis on the optimized spare tire groove model to determine the concentrated area of ​​modal strain energy;

[0025] Step 6: Generate a reinforcing rib structure in the concentrated area of ​​modal strain energy to form a re-optimized spare tire groove model.

[0026] The beneficial effects of the present invention are as follows: the present invention optimizes the morphology of the spare tire groove model by partitioning, fully considers the process feasibility, and optimizes and generates the best direction of the reinforcement ribs. The local structure of the spare tire groove model is strengthened and optimized by the calculated modal strain energy to generate the final optimization scheme. The target achievement efficiency of the spare tire groove mode is greatly improved, and the optimal feasible arrangement scheme of the reinforcement ribs of the spare tire groove is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A module connection diagram of a design system for improving the mode of a spare tire groove of an automobile in the present invention;

[0028] Figure 2 This is a front view of the initial model of the spare tire groove in the present invention;

[0029] Figure 3 A three-dimensional diagram of the initial model of the spare tire groove in the present invention;

[0030] Figure 4 This is the front view of the optimized spare tire groove model in the present invention;

[0031] Figure 5 A three-dimensional diagram of the optimized spare tire groove model in the present invention;

[0032] Figure 6 This is the front view of the optimized spare tire groove model in the present invention;

[0033] Figure 7 This is a three-dimensional diagram of the optimized spare tire groove model in the present invention;

[0034] Among them, 1—initial model construction module, 2—partition module, 3—morphology analysis module, 4—morphology optimization module, 5—modal analysis module, 6—morphology re-optimization module, 7—spare tire groove initial model (7.1—first plane area, 7.2—second plane area, 7.3—third plane area), 8—optimized spare tire groove model, 9—re-optimized spare tire groove model, 10—annular facade connection area, 11—facade reinforcement ribs. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] like Figure 1 As shown, the design system for improving the mode of the spare tire groove of an automobile designed in the present invention includes an initial model building module 1, a partitioning module 2, a morphology analysis module 3, a morphology optimization module 4, a modal analysis module 5 and a morphology re-optimization module 6.

[0037] like Figure 2 As shown in FIG. 3 , the initial model building module 1 sets the parameters of the initial geometric model of the spare tire groove according to the size of the spare tire groove, and generates the spare tire groove initial model 7.

[0038] The partition module 2 divides the spare tire groove initial model 7 into three areas according to the reinforcement arrangement characteristics of the spare tire groove initial model 7, including a first plane area 7.1 where reinforcement ribs can be freely arranged; a second plane area 7.2 composed of a circular ring and a rectangular splicing surface where annular reinforcement ribs can be arranged; and a third plane area 7.3 composed of a circular and rectangular splicing surface where circular and rectangular reinforcement ribs can be arranged.

[0039] The morphology analysis module 3 performs a working condition analysis on the spare tire groove initial model 7 to obtain a first-order modal vibration frequency and a second-order modal vibration frequency of the spare tire groove initial model 7 .

[0040] like Figure 4—5, the morphology optimization module 4 calculates the maximum value that the first-order modal vibration frequency and the maximum value that the second-order modal vibration frequency of the initial model 7 of the spare tire groove can reach, sets the reinforcement process parameters of each plane area according to the reinforcement rib structural characteristics of each plane area (the first plane area 7.1 can freely arrange reinforcement ribs, the second plane area 7.2 can arrange annular reinforcement ribs, and the third plane area 7.3 can arrange circular and rectangular reinforcement ribs), determines the reinforcement rib arrangement position and shape of each plane area, so that the first-order modal vibration frequency and the second-order modal vibration frequency of the initial model 7 of the spare tire groove arranged with reinforcement ribs are maximized.

[0041] like Figure 6 As shown in FIG. 7 , the modal analysis module 5 calculates the modal strain energy of each plane area and the modal strain energy of the annular facade connection area 10 between two adjacent plane areas, and determines the concentrated area of ​​the modal strain energy, which includes the annular facade connection area 10.

[0042] The morphology re-optimization module 6 arranges a plurality of facade reinforcement ribs 11 at intervals along the annular direction of the annular facade connection area 10, so that the modal strain energy of the annular facade connection area 10 is the same as the lowest modal strain energy of each plane area.

[0043] The design method of the above system is described in detail below in conjunction with a specific embodiment, which includes the following steps:

[0044] According to the initial geometric model, the finite element model of the spare tire groove is constructed using the automesh function module of HyperMesh software.

[0045] The finite element model constructed above is divided into zones according to the structural characteristics of the spare tire groove to ensure process feasibility and optimization feasibility: the first plane area 7.1 can freely arrange reinforcement ribs; the second circular ring and rectangular splicing plane (second plane area 7.2) construct annular reinforcement ribs; the third circular ring and rectangular splicing plane (third plane area 7.3) construct circular and rectangular reinforcement ribs.

[0046] Perform morphology optimization analysis on the partitioned finite element model, and use the normalmodes function under the Opitistruct module to set the modal analysis condition to calculate the modal frequency. The modal frequency is the natural frequency of the structure. If the modal frequency is close to the external excitation frequency, resonance may occur, and the structure will produce noise and damage due to resonance. The modal frequency is the focus of attention on the dynamic performance of the components on the body. The modal frequencies obtained in the analysis are sorted from small to large. The first vibration frequency is the first-order modal vibration frequency, followed by the second-order and third-order modes. In the patterngrouping sub-function in the topography function, set the plane, annular, circular and other reinforcement rib process parameters respectively, and use the topography function of the Optistruct module under the Hyperwoks software to optimize the morphology of the finite element model. The optimization goal is to maximize the first and second-order modal frequencies of the spare tire groove. With the goal of maximizing the first and second-order modal frequencies of the spare tire groove, the following is generated. Figure 4 —5 shows the recommended arrangement position and shape of the reinforcement ribs. After completing the morphology optimization analysis, the optimization results are analyzed and the reinforcement ribs are designed according to the recommended reinforcement rib distribution.

[0047] Combined with the modal strain energy obtained by finite element modal analysis, the modal strain energy is obtained according to the output ESE set in normal modes. In modal analysis, the modal strain energy of a certain area is high, which means that this area is easy to be excited. The modal strain energy is mainly distributed in the annular facade connection area 10 between the first plane area 7.1 and the second plane area 7.2. The strain energy concentration position is annular. Combined with the morphology optimization results and strain energy analysis results, annular spaced facade reinforcement ribs 11 are added in the annular facade connection area 10, and the design is as follows Figure 6 —The final optimized model shown in 7.

[0048] The present invention optimizes the spare tire groove model by partitioning, fully considers the process feasibility, and optimizes the optimal direction of the reinforcement ribs. The local structure of the spare tire groove model is strengthened and optimized by the calculated modal strain energy to generate the final optimization scheme. The target achievement efficiency of the spare tire groove mode is greatly improved, and the optimal feasible arrangement scheme of the reinforcement ribs of the spare tire groove is realized.

[0049] The above are only preferred embodiments of the present invention, and do not limit the structure of the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A design system for improving the mode of spare tire groove of automobiles, Features: It includes an initial model building module (1), a partitioning module (2), a morphology analysis module (3), a morphology optimization module (4), a modal analysis module (5) and a morphology re-optimization module (6); The initial model building module (1) is used to build an initial model (7) of the spare tire groove; The partitioning module (2) is used to partition the initial model of the spare tire groove (7) according to the structural characteristics, and determine the reinforcing rib structural characteristics of each partition; The morphology analysis module (3) is used to perform a working condition analysis on the spare tire groove initial model (7) to obtain a modal vibration frequency of the spare tire groove initial model (7); The morphology optimization module (4) is used to set the reinforcement rib process parameters of each partition according to the reinforcement rib structural characteristics of each partition and the modal vibration frequency of the spare tire groove initial model (7), generate the reinforcement rib structure of each partition, and form an optimized spare tire groove model (8) with the reinforcement rib structure; The modal analysis module (5) is used to perform modal strain energy analysis on the optimized spare tire groove model (8) to determine a concentrated area of ​​modal strain energy; The morphology re-optimization module (6) is used to generate a reinforcing rib structure in a concentrated area of ​​modal strain energy to form a re-optimized spare tire groove model (9); The partitioning module (2) is used to partition the initial model of the spare tire groove (7) according to the structural characteristics, and the method is: according to the reinforcement rib arrangement characteristics of the initial model of the spare tire groove (7), the initial model of the spare tire groove (7) is divided into at least three areas; The spare tire groove initial model (7) comprises a first plane area (7.1) where reinforcing ribs can be freely arranged; a second plane area (7.2) composed of a circular ring and a rectangular joint surface where annular reinforcing ribs can be arranged; and a third plane area (7.3) composed of a circular and a rectangular joint surface where circular and rectangular reinforcing ribs can be arranged.

2. The design system for improving the mode of the spare tire groove of an automobile as claimed in claim 1, Features: The method in which the initial model building module (1) is used to build the initial model (7) of the spare tire groove is as follows: according to the size of the spare tire groove, the parameters of the initial geometric model of the spare tire groove are set to generate the initial model (7) of the spare tire groove.

3. The design system for improving the mode of the spare tire groove of an automobile as claimed in claim 1, Features: The morphology analysis module (3) is used to perform a working condition analysis on the initial model of the spare tire groove (7), and a method for obtaining the modal vibration frequency of the initial model of the spare tire groove (7) is: performing a working condition analysis on the initial model of the spare tire groove (7) to obtain a first-order modal vibration frequency and a second-order modal vibration frequency of the initial model of the spare tire groove (7).

4. The design system for improving the mode of the spare tire groove of an automobile as claimed in claim 3, Features: The morphology optimization module (4) is used to set the reinforcement process parameters of each partition according to the reinforcement structure characteristics of each partition and the modal vibration frequency of the spare tire groove initial model (7), generate the reinforcement structure of each partition, and form an optimized spare tire groove model (8) with a reinforcement structure. The method is: calculate the maximum value that the first-order modal vibration frequency and the maximum value that the second-order modal vibration frequency of the spare tire groove initial model (7) can reach, set the reinforcement process parameters of each plane area according to the reinforcement structure characteristics of each partition, determine the reinforcement arrangement position and shape of each plane area, so that the first-order modal vibration frequency and the second-order modal vibration frequency of the spare tire groove initial model (7) arranged with reinforcement are maximized.

5. The design system for improving the mode of the spare tire groove of an automobile as claimed in claim 4, Features: The modal analysis module (5) is used to perform modal strain energy analysis on the optimized spare tire groove model (8), and a method for determining a concentrated area of ​​modal strain energy is: respectively calculating the modal strain energy of each plane area and the modal strain energy of the annular vertical connection area (10) between two adjacent plane areas, and determining the concentrated area of ​​modal strain energy.

6. The design system for improving the mode of the spare tire groove of an automobile as claimed in claim 5, Features: The concentrated area of ​​modal strain energy includes the annular facade connection area (10).

7. The design system for improving the mode of the spare tire groove of an automobile as claimed in claim 6, Features: The morphology re-optimization module (6) is used to generate a reinforcing rib structure in a concentrated area of ​​modal strain energy, and a method for forming a re-optimized spare tire groove model (9) is: a plurality of vertical reinforcing ribs (11) are arranged at intervals along the annular direction of the annular vertical connection area (10), so that the modal strain energy of the annular vertical connection area (10) is the same as the lowest modal strain energy of each planar area.

8. A design method for improving the mode of spare tire groove of automobile: Features: It includes the following steps: Step 1: construct an initial model of the spare tire slot (7); Step 2: partition the initial model of the spare tire groove (7) according to the structural characteristics, and determine the structural characteristics of the reinforcement ribs of each partition; Step 3: Performing a working condition analysis on the initial model (7) of the spare tire groove to obtain a modal vibration frequency of the initial model (7) of the spare tire groove; Step 4: setting the reinforcement process parameters of each partition according to the reinforcement structure characteristics of each partition and the modal vibration frequency of the initial model of the spare tire groove (7), generating the reinforcement structure of each partition, and forming an optimized spare tire groove model (8) with the reinforcement structure; Step 5: Perform modal strain energy analysis on the optimized spare tire groove model (8) to determine the concentrated area of ​​modal strain energy; Step 6: Generate a reinforcing rib structure in the concentrated area of ​​modal strain energy to form a re-optimized spare tire groove model (9); The method for partitioning the spare tire groove initial model (7) according to the structural characteristics is: dividing the spare tire groove initial model (7) into at least three areas according to the reinforcement rib arrangement characteristics of the spare tire groove initial model (7); The spare tire groove initial model (7) comprises a first plane area (7.1) where reinforcing ribs can be freely arranged; a second plane area (7.2) composed of a circular ring and a rectangular joint surface where annular reinforcing ribs can be arranged; and a third plane area (7.3) composed of a circular and a rectangular joint surface where circular and rectangular reinforcing ribs can be arranged.

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