Systems Approach in Development of Adaptive Energy Absorbing Steering Columns by Virtual Engineering

Hamid, Mohamed; Narayanasamy, Nirmal; Shah, Minoo J.; Riefe, Richard K.

doi:10.4271/2005-01-0705

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…Therefore, the reasonable matching use of the airbag and seatbelt plays an important role in improving vehicle safety performance. At present, research on restraint systems mainly focuses on the seatbelt, airbag and seat, as well as coordination and matching design for them to achieve optimal restraint performance and reduce the risk of occupant injury [13][14][15]. To reduce the injury risk caused by airbag deployment, Tian et al [16] used computer simulation methods to study the single-stage and doublestage airbag, and the results showed that the double-stage generator airbag had a better protection effect on the occupant.…”

Section: Introductionmentioning

confidence: 99%

Optimization Design and Injury Analysis of Driver’s Restraint System in Sedan Small Offset Collision

Yang

Shi

et al. 2022

Processes

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A combination of airbag, seatbelt, and other restraint systems greatly reduces injury to drivers in small offset collisions. However, the airbag causes accidental injury to the driver in the deployment process. To maximize the protection effect of the restraint system on the driver, this study proposes a pre-tensioned force-limiting seatbelt. A small offset collision accident with video information was simulated by using a Neon sedan and the THUMS (v.4.0.2) finite element model. The effectiveness of the accident model and the matching use of a pre-tensioned force-limiting seatbelt and airbag for driver protection were verified. To obtain the best parameter matching of protection effect, first, the seatbelt force-limiting A, pre-tensioned force B, pre-tensioned time C, airbag ignition time D, and mass flow coefficient E were selected as influencing factors, and orthogonal tests with different factor levels were designed. Then, the direct analysis method was applied to analyze the influence laws of each factor on driver dynamic response and injury. In addition, the radial basis function surrogate model was constructed by synthesizing each kind of critical injury value to the human body. Combined with NSGA-II multi-objective genetic algorithm, the structural performance parameters of the restraint system were optimized and matched. Results showed that the optimal protection matching parameters of the restraint system were 4933.5 N−2499.9 N−16 ms−15.3 ms−0.5 (A−B−C−D−E). Finally, the best matching parameters were input into the accident model for verification. After optimization, the WIC and Nij of drivers were reduced by 37.9% and 45.3%, respectively. The results show that the optimized restraint system can protect the driver the most.

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Section: Introductionmentioning

confidence: 99%

Optimization Design and Injury Analysis of Driver’s Restraint System in Sedan Small Offset Collision

Yang

Shi

et al. 2022

Processes

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“…However, in most cases, the proposed designs require the fitting of an additional control unit to adjust the column crash zoom [15,16] or involve the use of complicated column structures and are therefore incompatible with existing column designs [17,18]. Hamid et al [19] performed FE simulations to examine the impact response of an adaptive EA column incorporating a deformable metal strap drawn over an adjustable pin. It was shown that two levels of load could be achieved by keeping the pin in contact with the strap or moving the pin away from the strap contact respectively.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of a Novel Built-In Energy-Absorbing Component for Adaptive Steering Columns

Liu¹,

Tu²,

Fan³

et al. 2010

Proceedings of the Institution of Mechanical Engineers, Part D:

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The steering-wheel-steering-column assemblies fitted in automobiles must have a high energy absorption performance in order to minimize occupant chest injuries in the event of a collision. This paper proposes a novel built-in energy-absorbing (EA) component which causes the impact load transmitted to the occupant to vary in accordance with the crash severity and the occupant mass. A finite element (FE) model of the steering-column system is constructed on the basis of realistic product computer-aided design data, and a series of LS-DYNA simulations are performed to examine the dynamic responses of the steering wheel and steering column in body block impact tests performed using body blocks of different weights. The validity of the FE model is confirmed by comparing the numerical results for the torso force profile over the duration of the impact with the experimental results obtained in two standard body block tests. The validated model is then used to examine the energy absorption performance of the proposed EA device consisting of a hollow cylindrical tube patterned with an array of circular openings. The simulations focus specifically on the effects of the total holeopening area, the cylinder thickness, and the cylinder material on the torso force profile over the duration of the impact. It is shown that, given an appropriate specification of the design parameters, the proposed EA device satisfies the peak load requirement specified in the FMVSS 203 standard and absorbs 163 J and 235 J of the impact kinetic energy for body block weights of 24 kgf and 34 kgf respectively.

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Effectiveness of a Vehicle Restraint System Considering Different Anthropometric Human Standards

Morassi¹,

Blinder²,

Akiossi³

et al. 2010

SAE Technical Paper Series

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Systems Approach in Development of Adaptive Energy Absorbing Steering Columns by Virtual Engineering

Cited by 5 publications

References 4 publications

Optimization Design and Injury Analysis of Driver’s Restraint System in Sedan Small Offset Collision

Optimization Design and Injury Analysis of Driver’s Restraint System in Sedan Small Offset Collision

Numerical Study of a Novel Built-In Energy-Absorbing Component for Adaptive Steering Columns

Effectiveness of a Vehicle Restraint System Considering Different Anthropometric Human Standards

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