Reliability design optimization of vehicle front-end structure for pedestrian lower extremity protection under multiple impact cases

Lv, Xin; Gu, Xianguang; He, Lei; Zhou, Donghua; Liu, Weiguo

doi:10.1016/j.tws.2015.05.014

Cited by 30 publications

(3 citation statements)

References 27 publications

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“…Based on typical engineering processing and applications, the dimensional variables were all considered to be normally distributed. The probability distributions of the variables were determined by defining a coefficient of variation (COV) for each variable [24]. The COVs of the normal distributions of the design variables were determined by referring to definitions in the literature [25,26].…”

Section: Design Variable Uncertainty Analysismentioning

confidence: 99%

Optimal Design of Armored Vehicle Protective Components under Blast Impact

Li,

Fu,

Wang

et al. 2023

Preprint

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Traditional protective structure optimization design processes do not often consider uncertainty factors, such as material properties and structural dimensions. This causes the optimization results to be near the constraint boundaries and leads to insufficient reliability and robustness of the design. In this study, an accurate finite element model was obtained for armored vehicle protective component design through a physical explosion test and a simulation of the whole vehicle. Subsequently, uncertainty optimization, reliability optimization, and robustness optimization were introduced into the optimization process, and the uncertainty optimization results were analyzed and compared for different constraint degrees. The results show that the reliability of the results obtained from traditional deterministic optimization was low. Introducing the reliability optimization and robustness optimization design methods into the protective component design significantly improved the reliability of the protective component results.

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Section: Design Variable Uncertainty Analysismentioning

confidence: 99%

Optimal Design of Armored Vehicle Protective Components under Blast Impact

Li,

Fu,

Wang

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…2 The concept of pedestrian protection for vehicles was put forward in the 1960s. Many scholars have studied the traffic accidents and adopted pedestrian impactor model to carry out collision analysis by means of software modeling and test simulation on pedestrian head, calf, and thigh, 3,4 then more effective pedestrian protection measures are put forward. [5][6][7] At present, there are four kinds of pedestrian safety protection devices for vehicles: the optimized and improved bumper, 8 the pop-up engine hood, 9 the pedestrian airbag protection system, and the intelligent vehicle safety system.…”

Section: Introductionmentioning

confidence: 99%

Studying on the design and simulation of collision protection system between vehicle and pedestrian

Shen

Wang

et al. 2020

International Journal of Distributed Sensor Networks

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Pedestrian protection technology has become the most important issue in the field of vehicle safety. The design and simulation method of pedestrian protection system for vehicles is studied based on the Teoriya Resheniya Izobreatatelskih Zadatch theory in this article. The optimal solution of a new type of all-around airbag system mounted to the front of vehicles is presented after performing some Teoriya Resheniya Izobreatatelskih Zadatch analysis tools, such as the component analysis, causal analysis, resource analysis, and contradiction analysis. The digital modeling is carried out on the airbag deployments by SolidWorks, and the simulation analysis is performed on the collision between vehicle and pedestrian head by HyperWorks and LS-DYNA. The results show that the vehicle equipped with the front-end all-around airbag than without can play a better role in pedestrian head protection during the collision, making the maximum value of head injury criterion decrease by 66.7%, effectively reducing the collision damage and verifying the feasibility of the solution.

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“…Some new bumper systems were designed using new materials [ 11 – 14 ] or structures [ 15 , 16 ] to achieve the purpose of improving the crashworthiness under the two collision circumstances. In study of Lv et al, a systematic method had been performed to design and optimize the car front-end structure in order to reduce pedestrian injury risks [ 17 ]. Shuler designed a new bumper energy absorber using engineering plastics, which included a body and the upper and lower crushable members which would absorb more energy during impact [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Design of a Conceptual Bumper Energy Absorber Coupling Pedestrian Safety and Low-Speed Impact Requirements

Zhao

et al. 2018

Applied Bionics and Biomechanics

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The car front bumper system needs to meet the requirements of both pedestrian safety and low-speed impact which are somewhat contradicting. This study aims to design a new kind of modular self-adaptive energy absorber of the front bumper system which can balance the two performances. The X-shaped energy-absorbing structure was proposed which can enhance the energy absorption capacity during impact by changing its deformation mode based on the amount of external collision energy. Then, finite element simulations with a realistic vehicle bumper system are performed to demonstrate its crashworthiness in comparison with the traditional foam energy absorber, which presents a significant improvement of the two performances. Furthermore, the structural parameters of the X-shaped energy-absorbing structure including thickness (t u), side arc radius (R), and clamping boost beam thickness (t b) are analyzed using a full factorial method, and a multiobjective optimization is implemented regarding evaluation indexes of both pedestrian safety and low-speed impact. The optimal parameters are then verified, and the feasibility of the optimal results is confirmed. In conclusion, the new X-shaped energy absorber can meet both pedestrian safety and low-speed impact requirements well by altering the main deformation modes according to different impact energy levels.

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Reliability design optimization of vehicle front-end structure for pedestrian lower extremity protection under multiple impact cases

Cited by 30 publications

References 27 publications

Optimal Design of Armored Vehicle Protective Components under Blast Impact

Optimal Design of Armored Vehicle Protective Components under Blast Impact

Studying on the design and simulation of collision protection system between vehicle and pedestrian

Design of a Conceptual Bumper Energy Absorber Coupling Pedestrian Safety and Low-Speed Impact Requirements

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