Analysis Method of Vehicle Front-End Low-Speed Collision

Abstract

This invention discloses a method for analyzing low-speed front-end collisions of automobiles. During the design phase of an automobile, a front-end assembly comprising a front-end styling surface, a front anti-collision beam, and front through-lights or the front end of the engine hood can be constructed. An impactor can be inserted into this model, and low-speed front-end collision tests can be simulated directly within the model. Based on the results of each collision test, the model is adjusted to meet the automobile design requirements until the final design model of the automobile's front-end styling is completed. This process, in contrast to existing physical collision tests, is not only more convenient to operate but also shortens the development cycle and reduces development costs for automobile front-end styling.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile collision, and in particular to a method for analyzing low-speed collision of the front end of an automobile. Background Art

[0002] Low-speed collisions cause minimal personal injury, but damage to vehicle components can lead to significant economic losses. Low-speed collision safety is as important as high-speed collision safety and is a crucial component of vehicle passive safety. However, conducting real-car collision tests during the design and development phase is difficult, and the cost and feedback cycle are high. This often makes it difficult to provide feedback and guidance during the vehicle's design and development phase. In comparison, CAE collision simulation analysis based on LS-DYNA allows for earlier involvement in the vehicle's design and development phase. Simulation models can be established early in the design and development process, and feedback based on simulation results can be provided to identify issues in advance and guide design and development optimization.

[0003] For a long time, the freezing of styling data during automobile development has been crucial to the length of the entire automobile development cycle. Simulation has very little involvement in the automobile styling design stage, or even does not participate in the automobile styling design stage. Therefore, it is difficult to detect the irrationality of the automobile styling design in the early stages of development. In the later stages of product development, whether it is in the virtual simulation stage or the experimental collision stage, discovering its styling irrationality is a huge waste of the product development cycle and development costs.

[0004] Therefore, the existing technology has problems of long development cycle and high development cost in the automobile development stage. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems of long development cycle and high development cost in the automobile development stage in the prior art.

[0006] To solve the above problems, an embodiment of the present invention discloses a method for analyzing a low-speed front-end collision of an automobile, which is characterized by comprising the following steps:

[0007] S1: constructing an analysis model, wherein the analysis model includes a front-end assembly of a vehicle;

[0008] S2: inserting a collision device into the front end of the front end assembly in the analysis model;

[0009] S3: simulating a low-speed collision condition of the front end of the vehicle by the collision device, and judging whether the front end assembly is abnormal according to the state of the front end assembly; wherein,

[0010] If yes, go to step S4;

[0011] If not, proceed to step S5;

[0012] S4: Re-adjusting the arrangement of the front end assembly in the analysis model, and repeating step S3 until the adjusted front end assembly does not have any abnormality;

[0013] S5: The front-end assembly of the current analysis model is used as a design model.

[0014] By adopting the above-mentioned technical solution, the vehicle front-end low-speed collision analysis method provided by the present invention enables model analysis to be fully integrated into the design and development phase of the vehicle development process, thus forming a complete closed-loop development analysis and verification process. By considering the design concept of the vehicle front-end assembly during the styling design phase, model analysis is integrated into the vehicle styling design and development phase earlier, and a more rapid and accurate low-speed collision analysis method is proposed. This reduces the possibility of irrational styling design, reduces the number of subsequent modifications and adjustments to the styling, and reduces labor costs and the styling design development cycle.

[0015] According to another embodiment of the present invention, a method for analyzing a low-speed front-end collision of an automobile is provided.

[0016] In step S1: the front end assembly includes at least the front end styling surface of the vehicle, the front bumper, and the front through-light or the front end of the engine hood;

[0017] In step S2: inserting the impactor into the front end of the front end assembly in the analysis model, at a position corresponding to the front end styling surface, the front bumper beam, the front through-lamp or the front end of the engine hood;

[0018] In step S3: determining whether the front end assembly is abnormal by determining whether the front through lamp or the front end of the engine hood is deformed;

[0019] In the step S4: the relative positions of the front anti-collision beam and the front through-lamp or the front end of the engine hood are readjusted in the analysis model.

[0020] By adopting the above technical solution, the low-speed front-end collision analysis method provided in this embodiment only introduces the front-end styling surface, front anti-collision beam, and front through-light or the front end of the engine hood when constructing the model, without introducing other parts of the car. This can greatly reduce the cycle of car styling development and improve the work efficiency of car development.

[0021] According to another embodiment of the present invention, a method for analyzing a low-speed front-end collision of an automobile is provided.

[0022] In step S1, in the longitudinal direction of the automobile, the front penetrating lamp or the front end of the engine hood is located in front of the front anti-collision beam, and the distance between the front penetrating lamp or the front end of the engine hood and the front anti-collision beam is 35mm-45mm.

[0023] According to another embodiment of the present invention, a method for analyzing a low-speed front-end collision of an automobile is provided.

[0024] In step S2: the collision device is set to be 35mm-45mm away from the preset ground line, fit with the outer surface of the front end shape in the length direction of the car, overlap with the front anti-collision beam in the height direction of the car by at least 35mm, and is located in the middle position of the car in the width direction of the car.

[0025] According to another embodiment of the present invention, a method for analyzing a low-speed front-end collision of an automobile is provided.

[0026] In step S3:

[0027] When the front through-lamp or the front end of the engine hood is deformed, it is determined that the front end assembly is abnormal;

[0028] When the front through lamp or the front end of the engine hood is not deformed, it is determined that the front end assembly is not abnormal.

[0029] According to another embodiment of the present invention, a method for analyzing a low-speed front-end collision of an automobile is provided, in step S4:

[0030] When the relative positions of the front anti-collision beam and the front through-light or the front end of the engine hood are readjusted in the analysis model, the distance between the front anti-collision beam and the front through-light or the front end of the engine hood is reduced by 3 mm to 7 mm.

[0031] According to another embodiment of the present invention, a method for analyzing a low-speed front-end collision of an automobile is provided, wherein the front-end assembly further includes a cooling fan system and a front body-in-white.

[0032] According to another embodiment of the present invention, a method for analyzing a low-speed front-end collision of an automobile is provided, in step S1:

[0033] The analysis model is constructed through CAE simulation analysis.

[0034] The beneficial effects of the present invention are:

[0035] Using the low-speed front-end collision analysis method provided by the present invention, during the vehicle design phase, a front-end assembly can be constructed, including the front styling surface, front bumper, and front through-lights or the front end of the hood. Impactors can then be inserted into this model, allowing for direct simulation of low-speed front-end collision tests. Based on the results of each collision test, the model can be adjusted to meet vehicle design requirements until the final front-end design model is completed. This process, in contrast to existing physical collision tests, is not only more convenient to perform but also reduces the development cycle and costs of vehicle front-end styling.

[0036] Furthermore, the low-speed front-end collision analysis method provided by this invention only incorporates components affected by the low-speed front-end collision when constructing the front-end model, eliminating the need for other components. This significantly reduces experimental steps. This method can further shorten the development cycle and reduce development costs for front-end styling.

[0037] Other features and corresponding beneficial effects of the present invention are described in the latter part of the specification, and it should be understood that at least some of the beneficial effects become obvious from the description in the specification of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A flow chart of a method for analyzing a low-speed front-end collision of an automobile provided in an embodiment of the present invention;

[0039] Figure 2 This is a diagram of an analysis model used in a method for analyzing a low-speed front-end collision of a vehicle provided by an embodiment of the present invention;

[0040] Figure 3 A schematic diagram of the structure of the impactor in the vehicle front low-speed collision analysis method provided by an embodiment of the present invention;

[0041] Figure 4 A schematic diagram of the axonometric structure of the analysis model in the vehicle front-end low-speed collision analysis method provided by an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of the main structure of the analysis model in the vehicle front-end low-speed collision analysis method provided by an embodiment of the present invention.

[0043] Description of reference numerals:

[0044] 100, front end assembly;

[0045] 110, front end styling surface;

[0046] 120. Front anti-collision beam;

[0047] 130. Engine hood;

[0048] 200. Collider. DETAILED DESCRIPTION

[0049] The following is an explanation of the embodiments of the present invention by specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiment is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will contain many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0050] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0051] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0052] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0053] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0054] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0055] The embodiment of the present invention discloses a method for analyzing a low-speed front-end collision of an automobile. Figure 1 As shown, the following steps are included:

[0056] S1: constructing an analysis model, the analysis model including a front end assembly 100 of a vehicle;

[0057] S2: The collider 200 (such as Figure 3 The structure shown) is inserted into the front end of the front end assembly 100 in the analysis model;

[0058] S3: Simulate a low-speed collision condition of the front end of the vehicle through the impactor 200, and determine whether the front end assembly 100 is abnormal based on the state of the front end assembly 100; wherein,

[0059] If yes, go to step S4;

[0060] If not, proceed to step S5;

[0061] S4: Re-adjusting the layout of the front end assembly 100 in the analysis model, and repeating step S3 until the adjusted front end assembly 100 does not have any abnormality;

[0062] S5: The front end assembly 100 of the current analysis model is used as the design model.

[0063] Specifically, the vehicle front-end low-speed collision analysis method provided in this embodiment enables model analysis to be integrated into the design and development phase of the vehicle development process, forming a complete, closed-loop development, analysis, and verification process. By considering the design of the vehicle front-end assembly 100 during the styling design phase, model analysis is integrated earlier into the vehicle's design and development phase, providing a faster and more accurate low-speed collision analysis method. This reduces the likelihood of irrational styling design errors, minimizes the number of subsequent styling modifications and adjustments, and reduces labor costs and the styling design development cycle.

[0064] It should be noted that the impactor 200 is a commonly used component for those skilled in the art, and its specific structure is not explained in this embodiment.

[0065] Preferably, in step S1: the front end assembly 100 includes at least the front end styling surface 110 of the vehicle, the front bumper beam 120, and the front end of the front through-light or the engine hood 130;

[0066] In step S2: Figure 2-Figure 5 As shown, the impactor 200 is inserted into the front end of the front end assembly 100 in the analysis model, at a position corresponding to the front end styling surface 110, the front bumper beam 120, the front through-light or the front end of the engine hood 130;

[0067] In step S3: determining whether the front end assembly 100 is abnormal by determining whether the front through lamp or the front end of the engine hood 130 is deformed;

[0068] In step S4 : the relative positions of the front anti-collision beam 120 and the front through-lamp or the front end of the engine hood 130 are readjusted in the analysis model.

[0069] Specifically, the vehicle front-end low-speed collision analysis method provided in this embodiment only introduces the front-end styling surface 110, the front anti-collision beam 120, and the front end of the front through-lamp or the engine hood 130 when constructing the model, without introducing other components of the vehicle. This can greatly reduce the cycle of vehicle styling development and improve the work efficiency of vehicle development.

[0070] It should be noted that, in this embodiment, the front end assembly 100 may include the front end styling surface 110, the front bumper beam 120, and the front through-light of the automobile; the front end styling surface 110, the front bumper beam 120, and the front end of the engine hood of the automobile; the specific selection may be based on the actual vehicle model.

[0071] Preferably, in step S1, in the longitudinal direction of the car, the front end of the front penetrating light or the engine hood 130 is located in front of the front bumper beam 120, and the distance between the front end of the front penetrating light or the engine hood 130 and the front bumper beam 120 is 35mm-45mm.

[0072] Specifically, in this embodiment, the distance between the front through-light or the front end of the engine hood 130 and the front anti-collision beam 120 can be set to various values such as 35mm, 40mm, 45mm, etc., which can be set according to actual needs. This embodiment does not make specific requirements for this.

[0073] Preferably, if Figure 2 and Figure 4 As shown, the distance between the front through-light or the front end of the engine hood 130 and the front anti-collision beam 120 is set to L2 = 40 mm.

[0074] Preferably, in step S2: the impactor 200 is set to: 35mm-45mm away from the preset ground line, fit with the outer surface of the front end shape in the length direction of the car, and overlap with the front anti-collision beam 120 in the height direction of the car by at least 35mm, and is located in the middle position of the car in the width direction of the car.

[0075] Preferably, if Figure 2 and Figure 5 As shown, in this embodiment, the impactor 200 is set to be: 40 mm away from the preset ground line L1, and overlaps with the front anti-collision beam 120 at a height of H = 40 mm in the height direction of the car. Of course, it can also be set in other ways, and the specific setting should be based on actual needs. This embodiment does not limit this.

[0076] Preferably, in step S3:

[0077] When the front through lamp or the front end of the engine hood 130 is deformed, it is determined that the front end assembly 100 is abnormal;

[0078] If the front through lamp or the front end of the engine hood 130 is not deformed, it is determined that the front end assembly 100 is not abnormal.

[0079] Specifically, in the collision test, if any one of the front through-light and the front end of the engine hood is deformed, it is determined that the front end assembly 100 has an abnormality; only when neither the front through-light nor the front end of the engine hood has an abnormality, it is determined that the front end assembly 100 has no abnormality.

[0080] Preferably, in step S4:

[0081] When the relative positions of the front anti-collision beam 120 and the front through-light or the front end of the engine hood 130 are readjusted in the analysis model, the distance between the front anti-collision beam 120 and the front through-light or the front end of the engine hood 130 is reduced by 3 mm to 7 mm.

[0082] Preferably, in a collision test, when it is determined that an abnormality occurs in the front end assembly 100, this embodiment preferably reduces the distance between the front anti-collision beam 120 and the front end of the front through-lamp or the engine hood 130 by 5 mm each time until no abnormality occurs in the collision.

[0083] Preferably, the front end assembly 100 further includes a cooling fan system and a front body-in-white.

[0084] Preferably, in step S1: the analysis model is constructed through CAE simulation analysis.

[0085] It should be noted that this embodiment only shows a means of establishing an analysis model, and it can also be established in other ways. The present invention will not explain this in detail, but all of them fall within the scope of protection of the present invention.

[0086] The automobile front-end low-speed collision analysis method provided by the present invention can construct an automobile front-end assembly 100 having a front-end styling surface 110, a front anti-collision beam 120, and a front through-lamp or an engine hood 130 during the automobile styling design stage, and insert a collision device 200 into the model. The automobile front-end low-speed collision test can be simulated directly in the model, and the model can be adjusted according to the results of each collision test to meet the automobile design requirements until the final automobile front-end styling design model is completed. In this process, since all test actions are implemented in the model, compared with existing physical collision tests, it is not only convenient to operate, but also can shorten the development cycle of the automobile front-end styling and reduce development costs. For example, it can save about 60% of the modeling time and 70% of the calculation time.

[0087] Furthermore, the vehicle front-end low-speed collision analysis method provided by this invention only incorporates components affected by the low-speed collision when constructing the vehicle front-end model, eliminating the need for other components. This significantly reduces experimental steps. This method can further shorten the development cycle and reduce development costs for vehicle front-end styling.

[0088] Although the present invention has been illustrated and described with reference to certain preferred embodiments thereof, it should be understood by those skilled in the art that the above description is provided as a further detailed description of the present invention in conjunction with specific embodiments thereof, and that the specific implementation of the present invention is not limited to these descriptions. Those skilled in the art may make various changes in form and details, including simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A method for analyzing a low-speed front-end collision of an automobile, characterized in that: The following steps are involved: Step S1: constructing an analysis model, wherein the analysis model includes a front end assembly of a vehicle; the front end assembly includes at least a front end styling surface, a front bumper beam, and a front through-light or a front end of an engine hood; Step S2: inserting a collision device into the front end of the front end assembly in the analysis model, at a position corresponding to the front end styling surface, the front anti-collision beam, the front through-lamp or the front end of the engine hood; Step S3: simulating a low-speed collision condition of the front end of the vehicle by the impactor, and determining whether the front through-lamp or the front end of the engine hood is deformed to determine whether the front end assembly is abnormal; wherein, If yes, go to step S4; If not, proceed to step S5; Step S4: Re-adjusting the relative positions of the front anti-collision beam and the front through-lamp or the front end of the engine hood in the analysis model, and repeating step S3 until the adjusted front end assembly does not have any abnormality; Step S5: using the front-end assembly of the current analysis model as a design model.

2. The vehicle front low-speed collision analysis method according to claim 1, characterized in that: In step S1, in the longitudinal direction of the automobile, the front penetrating lamp or the front end of the engine hood is located in front of the front anti-collision beam, and the distance between the front penetrating lamp or the front end of the engine hood and the front anti-collision beam is 35mm-45mm.

3. The vehicle front low-speed collision analysis method according to claim 2, characterized in that: In step S2: the collision device is set to be 35mm-45mm away from the preset ground line, fit with the outer surface of the front end shape in the length direction of the car, overlap with the front anti-collision beam in the height direction of the car by at least 35mm, and is located in the middle position of the car in the width direction of the car.

4. The vehicle front low-speed collision analysis method according to claim 3, characterized in that: In step S3: When the front through-lamp or the front end of the engine hood is deformed, it is determined that the front end assembly is abnormal; When the front through lamp or the front end of the engine hood is not deformed, it is determined that the front end assembly is not abnormal.

5. The vehicle front-end low-speed collision analysis method according to claim 1, characterized in that: In step S4: When the relative positions of the front anti-collision beam and the front through-light or the front end of the engine hood are readjusted in the analysis model, the distance between the front anti-collision beam and the front through-light or the front end of the engine hood is reduced by 3 mm to 7 mm.

6. The vehicle front-end low-speed collision analysis method according to claim 3, characterized in that: The front end assembly also includes a cooling fan system and a front body-in-white.

7. The vehicle front-end low-speed collision analysis method according to any one of claims 1 to 6, characterized in that: In step S1: The analysis model is constructed through CAE simulation analysis.

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