Vehicle crash optimization considering a roof crush test and a side impact test

Lee, Youngmyung; Han, Yong‐Ha; Park, Sang-Ok; Park, Gyung-Jin

doi:10.1177/0954407018794259

Cited by 13 publications

(5 citation statements)

References 26 publications

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“…They also modified the structure with implicit parameterization technology, which reduced the total body mass by 32.41 kg, while the passive safety performance in frontal and side impact scenarios was almost unchanged. Lee et al [8] proposed a collision optimization method that simultaneously considered side impact tests and roof extrusion tests. Topological optimization was used to design the B-pillar stiffener, which reduced the body mass while meeting the crashworthiness requirements.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Rollover Crashworthiness and Vehicle Mass Based on Unreplicated Saturated Factorial Design

et al. 2023

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In the realm of van design, researchers have been diligently working to enhance rollover crashworthiness while concurrently achieving lightweight body structures. Unlike front and side impacts, rollover crashworthiness is impacted by a greater number of structural dimensions and material parameters. As such, this paper implements an unreplicated saturated factorial design to conduct factor screening for vehicle rollover crashworthiness. This approach effectively and accurately resolves the screening challenges that arise from large numbers of factors, and eliminates dependence on traditional design experience. Consequently, it shortens the design cycle and reduces development costs. In addition, this paper establishes four Kriging approximate models that describe the specific energy absorption and total mass of the key body structure, the displacement of the roof, and the maximum angular velocity of the body’s center of mass. To address the multi-objective optimization problem of improving rollover crashworthiness while reducing mass, this paper combines the particle swarm optimization algorithm with the artificial immune algorithm. This hybrid algorithm converges rapidly, and the Pareto solution set exhibits superior uniformity and diversity. Finally, the shortest distance method is employed to identify the optimal design scheme that can enhance the rollover crashworthiness of vans and reduce the mass of body parts.

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Section: Introductionmentioning

confidence: 99%

Optimization of Rollover Crashworthiness and Vehicle Mass Based on Unreplicated Saturated Factorial Design

et al. 2023

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“…The nonlinear dynamic response optimization can be converted to an iterative "linear optimization ↔ nonlinear analysis" process by using the ESL. Many researchers carried out crashworthiness design of automobile frontal structure [20], roof structure [21], front hood panel [22][23][24], and B-pillar [25]. The ESL method bring convenience to solve topometry.…”

Section: Introductionmentioning

confidence: 99%

Topometry Optimization of Energy Absorbing Structure through Targeting Force-Displacement Method considering Tailor Rolled Blank Process

Wang

Lin

et al. 2022

International Journal of Aerospace Engineering

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Inspired by topometry optimization, this work proposed a new design approach that mixed of targeting force-displacement (TFD) method and tailor rolled blank (TRB) process for thin-walled energy absorption structures, which has vast applied prospects in the aerospace and automotive industries. This method not only overcomes manufacturing difficulty caused by the TFD method based on topometry optimization but also provides a new idea for TRB energy absorption structure. The optimized results can be transferred to the computer aided design environment without additional postprocessing. Firstly, a uniform thickness constraint is introduced to make the designed structure have constant thickness distribution along desired direction; topometry optimization is carried out to use TFD method. Secondly, a method that can automatically divide the design domain is developed. The adjacent elements with smaller thickness differences are merged to form TRB subdomains based on the optimization results of forestep, and the TFD method is used again. Finally, TRB finite element modeling codes is developed. According to the second step, modeling of the transition zone is added to finally form the TRB structure that meets the requirements of manufacturing. This method is used to optimize the crashworthiness of the thin-walled tube under axial and oblique loading. Numerical results demonstrate the effectiveness of this method. Therefore, this method can be used to design high-efficiency energy absorber on aircraft or automobile, such as the strut of aircraft and energy absorption box of automobile.

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“…Major reasons for this phenomenon are that the side parts of the vehicle are poorly designed with energy absorption components with respect to engine compartment or trunk [10][11][12]. What's more, the back mirrors and looking ahead are insufficient to provide all the information about adjacent paths [13]. A high frequency of watching the surrounding environment probably is hard for an ordinary driver.…”

Section: Introductionmentioning

confidence: 99%

Advanced post‐impact safety and stability control for electric vehicles

Ao¹,

Zhang

et al. 2022

IET Intelligent Trans Sys

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In terms of the possible secondary or multiple events accidents (MEA) after an initial vehicle to vehicle (V2V) impact, this research proposes an active safety & stability controller for independent-driven electric vehicles towards recovering the vehicle to safety states after an impact. The controller aims to regulate the course angle and lateral deviation that enforce the vehicle back to its original driving path. The upper-level controller is derived based on sliding mode technique. And the low-level controller aims to solve a convex quadratic allocation problem, which inherently incorporates fault-tolerance property. The independent in-wheel-motor (IWM) fault is very likely to happen under a real V2V impact and it contributes much to the driving safety & stability. Two typical real-endcollision scenarios under low-and high longitudinal velocities are designed to verify the proposed controller performance. The low-and high velocities collisions aim to simulate the urban and highway accidents, respectively. Compared to other control methods, i.e. pure braking and static allocation, the RMSEs of safety (lateral deviation, course angle) and stability indexes (yaw rate, sideslip angle) under proposed controller reduce significantly both in urban and highway accidents. Moreover, the controller performs robust enough against the impact-induced IWM fault. It further supports the effectiveness at dealing with the safety and stability of the ego vehicle after an initial impact and prevent possible MEA.

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Vehicle crash optimization considering a roof crush test and a side impact test

Cited by 13 publications

References 26 publications

Optimization of Rollover Crashworthiness and Vehicle Mass Based on Unreplicated Saturated Factorial Design

Optimization of Rollover Crashworthiness and Vehicle Mass Based on Unreplicated Saturated Factorial Design

Topometry Optimization of Energy Absorbing Structure through Targeting Force-Displacement Method considering Tailor Rolled Blank Process

Advanced post‐impact safety and stability control for electric vehicles

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