CN-115438423-B - Global vehicle collision safety front collision design method and model

CN115438423BCN 115438423 BCN115438423 BCN 115438423BCN-115438423-B

Abstract

The invention relates to the technical field of automobile parts, in particular to a global vehicle collision safety front collision design method and a model, which are used for solving the problem that the existing collision safety front collision design method is limited to one or two markets and cannot meet the demands facing the global markets. According to the invention, related technology racing car analysis is firstly carried out at the initial stage of new platform design, then a new platform development design stage is carried out, firstly, a pending stage is arranged at the early stage, a collision space required by the left rudder and right rudder height standard collision safety requirements is required to be met, secondly, the whole car collision path design is carried out, thirdly, the front collision key piece design and the passenger cabin structural design are carried out, and thirdly, the front collision multi-working condition matching design is carried out. The invention can avoid platform change caused by the subsequent increase of international markets, can control the overall safety risk, reduce the number of subsequent verification vehicles to the minimum and reduce the development cost of the whole vehicle.

Inventors

ZENG TING
LI PING
LIU SUHONG
XU WENPING
WANG FEI
ZHAO ZHIXIA
KOU SHIHONG
WANG HONGBIN
TU JINGANG

Assignees

奇瑞汽车股份有限公司

Dates

Publication Date: 20260505
Application Date: 20220819

Claims (4)

1. A global vehicle crash safety frontal collision design method, the method comprising: Performing bid analysis to determine performance targets, structural forms and weight targets of global vehicle collision safety front collision design; After the analysis of the competitive products is completed, front collision space design, whole vehicle collision path design, front collision key piece design, passenger cabin structural design and front collision multi-station matching design are sequentially carried out, so that a design scheme meeting the global vehicle collision safety front collision design specification is obtained; the front collision space design comprises the steps of adopting Computer Aided Engineering (CAE) concept design software in the front concept design to verify the influence of space and path on RW working condition and ODB working condition, and is used for competing for collision space and ensuring that the front collision transmission path meets the requirements; Designing a left rudder or right rudder braking system arrangement when the collision space is arranged in the early stage, wherein the space from the power assembly to the vacuum booster or the linear control braking system, the space from the pedal mounting plate to the steering system motor or the mounting plate and the space from the pedal mounting plate to the automobile instrument board beam CCB mounting plate are designed; the whole car collision path design comprises the following steps: the front collision path design and matching specifically comprises the design and matching of a longitudinal beam main path, a shotgun path and an auxiliary frame path; the design of the front transverse supporting strength comprises the design of the Y-direction supporting strength of a main front bumper beam and the Y-direction supporting strength of a lower bumper beam; the front collision key piece design specifically comprises the step-by-step deformation design in the X direction, and energy is absorbed in a front cabin area; The structural design of the passenger cabin specifically comprises the steps of adopting CAE simulation to match the overall deformation mode of RW and ODB working conditions; the front-end collision multi-working condition matching design specifically comprises the steps of adopting CAE to carry out multi-working condition matching design, controlling the robustness of deformation in the early stage, carrying out related detail design and matching on the compatibility of MPDB working conditions, and carrying out RW and ODB working condition verification until the three working conditions of MPDB, RW and ODB are balanced together; carrying out SOB working condition optimization design, adding reinforcing members on the basis of optimizing a vehicle body under three working conditions of MPDB, RW and ODB, and packaging the whole reinforcing members in a SOB working condition package mode for meeting SOB related structural requirements in a passenger cabin; In the front collision multi-working condition matching design, a key piece light-weight step is adopted, and the method specifically comprises the steps of carrying out strength matching on front cabin key pieces, namely carrying out profile, material and material thickness design on a bumper beam, an energy absorption box and a longitudinal beam, and carrying out light-weight design on passenger cabin key pieces, namely carrying out profile, material and material thickness design on an A column vertical plate, a firewall reinforcing beam and a floor longitudinal beam in a multi-working condition matching process.
2. A global vehicle crash safety frontal collision design method according to claim 1, wherein, The competitive product analysis comprises the steps of determining a safety performance target requirement according to a new platform vehicle model market definition, selecting a competitive product vehicle meeting the target market collision safety target requirement, analyzing the arrangement form, the structural frame and the cross section of a key piece of the competitive product vehicle, combining the weight and the safety performance of the conventional vehicle model of the company to achieve the condition, formulating a weight target for the new platform vehicle model according to a light weight coefficient, and decomposing the target to a relevant market front collision structural design target according to the safety target requirement.
3. The global vehicle collision safety frontal collision design model is characterized by comprising a bid product analysis unit and a development design unit: the bidding product analysis unit is used for determining performance targets, structural forms and weight targets of global vehicle collision safety front collision design; The development design unit is used for sequentially carrying out front collision space design, whole vehicle collision path design, front collision related key piece design, passenger cabin structural design and front collision multi-working condition matching design after the analysis of the competitive products, and obtaining a design scheme meeting the global vehicle collision safety front collision design specification after the front collision multi-working condition matching design is completed; the front collision space design comprises the steps of adopting Computer Aided Engineering (CAE) concept design software in the front concept design to verify the influence of space and path on RW working condition and ODB working condition, and is used for competing for collision space and ensuring that the front collision transmission path meets the requirements; Designing a left rudder or right rudder braking system arrangement when the collision space is arranged in the early stage, wherein the space from the power assembly to the vacuum booster or the linear control braking system, the space from the pedal mounting plate to the steering system motor or the mounting plate and the space from the pedal mounting plate to the automobile instrument board beam CCB mounting plate are designed; the whole car collision path design comprises the following steps: the front collision path design and matching specifically comprises the design and matching of a longitudinal beam main path, a shotgun path and an auxiliary frame path; the design of the front transverse supporting strength comprises the design of the Y-direction supporting strength of a main front bumper beam and the Y-direction supporting strength of a lower bumper beam; the front collision key piece design specifically comprises the step-by-step deformation design in the X direction, and energy is absorbed in a front cabin area; The structural design of the passenger cabin specifically comprises the steps of adopting CAE simulation to match the overall deformation mode of RW and ODB working conditions; the front-end collision multi-working condition matching design specifically comprises the steps of adopting CAE to carry out multi-working condition matching design, controlling the robustness of deformation in the early stage, carrying out related detail design and matching on the compatibility of MPDB working conditions, and carrying out RW and ODB working condition verification until the three working conditions of MPDB, RW and ODB are balanced together; carrying out SOB working condition optimization design, adding reinforcing members on the basis of optimizing a vehicle body under three working conditions of MPDB, RW and ODB, and packaging the whole reinforcing members in a SOB working condition package mode for meeting SOB related structural requirements in a passenger cabin; In the front collision multi-working condition matching design, a key piece light-weight step is adopted, and the method specifically comprises the steps of carrying out strength matching on front cabin key pieces, namely carrying out profile, material and material thickness design on a bumper beam, an energy absorption box and a longitudinal beam, and carrying out light-weight design on passenger cabin key pieces, namely carrying out profile, material and material thickness design on an A column vertical plate, a firewall reinforcing beam and a floor longitudinal beam in a multi-working condition matching process.
4. A global vehicle crash safety frontal collision design model according to claim 3, wherein, The bid analysis unit is used for: according to the market definition of the new platform vehicle type, the safety performance target requirement is determined, the racing car meeting the target market collision safety target requirement is selected, the arrangement form, the structural frame and the key piece section of the racing car are analyzed, the weight and the safety performance of the conventional vehicle type of the company are combined to achieve the condition, the weight target is formulated for the new platform vehicle type according to the light weight coefficient, and the target is decomposed to the related market front collision structural design target according to the safety target requirement.

Description

Global vehicle collision safety front collision design method and model Technical Field The invention relates to the technical field of automobile parts, in particular to a global vehicle collision safety front collision design method and model. Background In recent decades, automobile technology and innovation are different day by day, and main automobile accident characteristics of the country are also focused on by each country, so that collision safety regulations of each country are integrally updated in recent two years, including a C-NCAP of 2021 edition of China and a safety index C-IASI of China of 2020 edition of China, euro-NCAP of European 2020 edition, L-NCAP of 2020 edition of Lamet, A-NCAP of 2020 edition of Australia and 2021 edition ASEAN NCAP of the east Asia. Along with the expansion of global markets of companies, a platform or a vehicle type needs to meet the corresponding high-level collision safety requirements of all areas, so that in the early-stage research and development design, the platform development needs to meet the requirements of meeting five stars or G levels of all markets globally, and the development and design difficulty of a new platform is improved to a new level. In the development of a new platform, only front collision working conditions of all markets around the world need to be considered, the working conditions comprise a working condition that a test vehicle collides with a 100% front rigid wall (hereinafter referred to as RW) at a speed of 50km/h-56km/h, the test vehicle collides with a moving progressive barrier trolley respectively at a collision speed of 50km/h in a front 50% overlapping offset manner (hereinafter referred to as MPDB,2021 standard is newly added), the test vehicle collides with a fixed variable obstacle avoidance (hereinafter referred to as ODB) working condition with a 40% overlapping rate at a speed of 64km/h, and the test vehicle collides with a fixed rigid wall (hereinafter referred to as SOB) working condition at a speed of 64.4km/h and a 25% overlapping rate. Since the development vehicle type strategy marketed before 2021 does not need to consider meeting the high standard requirement of collision safety in so many markets on the same platform, and the new MPDB working condition compatibility penalty of 2021 version increases a difficulty in vehicle design requirement, the new vehicle enterprise design platform is not limited to two markets any more, but is intended to design vehicles meeting the 2021 global vehicle requirement in the present day of gradually advancing and expanding the China automobile market, which is a challenge for each host factory. In summary, the existing design method of collision safety front collision is limited to one or two markets, and cannot meet the demands of global markets. Disclosure of Invention Aiming at the problems in the background technology, the invention provides a global vehicle collision safety front collision design method and a model, which are used for solving the problem that the existing collision safety front collision design method is limited to one or two markets and cannot meet the demands facing the global market. A global vehicle crash safety frontal collision design method, the method comprising: Performing bid analysis to determine performance targets, structural forms and weight targets of global vehicle collision safety front collision design; After the analysis of the competitive products is completed, front collision space design, whole vehicle collision path design, front collision key piece design, passenger cabin structural design and front collision multi-station matching design are sequentially carried out, so that a design scheme meeting the global vehicle collision safety front collision design specification is obtained. Further, the bid analysis comprises the steps of determining a safety performance target requirement according to a new platform vehicle model market definition, selecting a bid vehicle meeting the target market collision safety target requirement, analyzing the arrangement form, the structural frame and the cross section of a key piece of the bid vehicle, combining the weight and the safety performance of the past vehicle model of the company to achieve the condition, making a weight target for the new platform vehicle model according to a light weight coefficient, and decomposing the target to a related market front collision structural design target according to the safety target requirement. Further, the front collision space design comprises the steps of verifying the influence of space and paths on RW working conditions (a test vehicle collides with 100% front rigid wall working condition at the speed of 50km/h-56 km/h-for short RW) and ODB working conditions (a test vehicle collides with fixed variability obstacle avoidance-for short ODB with the overlapping rate of 40% at the speed of 64 km/h) by adopting computer aided engineering CAE sof