Reverse reconstruction of two-wheeled vehicle accident based on Facet vehicle model and hybrid human model

Wang, Qian; Lou, Yunfeng; Jin, Xian; Kong, Lingshuang; Qin, Chuang; Hou, Xiao

doi:10.1080/13588265.2020.1836840

Cited by 6 publications

(10 citation statements)

References 25 publications

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“…Every parameter (speed, angle, OV type, MC type) was managed by HyperStudy to automatically generate the simulation files with a runtime of 500 ms. As this study only evaluated primary impacts, a 500 ms window was considered adequate to capture these events in agreement with other studies [23][24][25][26][27][28][29]. The coefficient of friction between the dummy and the car was demonstrated to have a remarkable effect on trajectories and head impact time and was therefore set to 0.3, which is in accordance with IOP Publishing doi:10.1088/1757-899X/1306/1/012034 5 several studies [6,18,20,30,31]. A friction coefficient of 0.8 was assumed for the tire-ground contact to represent a dry asphalt road [32][33][34].…”

Section: Simulation Set-upsupporting

confidence: 58%

Influence of car front-end designs on motorcyclists’ trajectory in head-on and side-on-head crashes

Perticone,

Nardomarino,

Baldanzini

2024

IOP Conf. Ser.: Mater. Sci. Eng.

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Motorcyclists are highly vulnerable road users, and cars are one of their primary crash opponents. This study investigates the influence of car front-end designs on motorcyclist trajectory in head-on and side-on-head crashes. The analysis is based on a dataset of 120 multi-body crash simulations conducted using MADYMO and post-processed with MATLAB. An analysis of 1412 real-world Powered Two-Wheeler (PTW) to car accidents was conducted to determine the most common crash configurations and the associated ranges of the variables, such as vehicle speeds and contact points. Three PTW styles (sport-touring, scooter, and sport) and four car front-end designs (Sport utility vehicle (SUV), Family Car/Sedan (FCR), Roadster (RDS), and Multi-purpose vehicle (MPV)) were considered. The study examined the riders’ thrown distance in both collision types. It was observed that, regardless of the collision type, the head was identified overall as the primary body region coming into contact with the opposing vehicle, followed by the chest and neck. In frontal collisions, an augmented bonnet height corresponded to an increased incidence of head contact, whereas a lower bonnet height resulted in a higher frequency of chest contact. Moreover, the thrown distance depended also on PTW speed, particularly for sport and sport-touring motorcycles. Notably, contact with the car windscreen was only observed at velocities exceeding 60 km/h, whereas impact with the bonnet leading edge occurred exclusively below this threshold. Due to the shielding effect of their PTW’s fairing, scooter riders predominantly experienced no contact with the opposing vehicle. Sport-touring motorcycles exhibited a more vertical trajectory upon ejection, leading to a greater likelihood of overturning and subsequent rearward head impact with the vehicle. In contrast, sport motorcycles tended to forward projections with a high likelihood of chest contact. In the case of lateral impacts, it was observed that vehicles with a more prominent profile, such as SUVs and MPVs, equipped with protruding bumpers, effectively restrained riders. In this case, vehicle speed did not exert a significant influence on the thrown distance. Additionally, the presence of a conspicuous fuel tank and the initial posture of the rider on the PTW played a crucial role in determining the final thrown distance. Due to their upright postures and the absence of a pronounced fuel tank, scooter dummies were thrown further than others, thus causing head contact with the windscreen. These findings highlight the importance of car front-end design and PTW fairings in mitigating riders’ injuries and provide valuable insights to vehicle manufacturers for developing tailored safety measures for riders.

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Section: Simulation Set-upsupporting

confidence: 58%

Influence of car front-end designs on motorcyclists’ trajectory in head-on and side-on-head crashes

Perticone,

Nardomarino,

Baldanzini

2024

IOP Conf. Ser.: Mater. Sci. Eng.

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“…It not only ensures accuracy but also saves calculation time. The Facet model was built by importing and exporting to/from 3Dmax, HYPERMESH, and MADYMO, in turn, and setting the relevant grids and nodes [ 1 , 27 , 28 ]. For a Facet model of accident vehicles, such as buses, in the contact coupling calculation, it is necessary to define the equivalent elastic–plastic stiffness curve of the vehicle collision; that is, the relationship between the contact force and penetration, as shown in Figure 1 [ 29 , 30 ].…”

Section: Methodsmentioning

confidence: 99%

“…The head material parameters used in this study are shown in Table 1 . Through the local blunt and accident simulation experiments, it was verified that the contact of each body part of the rigid–flexible coupled HM can function normally and that the contact characteristics of the model conform to the contact characteristics of the human body, which proved the validity of the model [ 1 ].…”

Section: Methodsmentioning

confidence: 99%

“…At present, two-wheeled vehicle accidents account for 28% of world traffic fatalities and make up 20% of all traffic deaths in China [ 1 ]. In recent years, study of the perception and protective equipment of two-wheeled vehicles under complex traffic conditions has also received increasing attention from researchers [ 2 , 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, bus accident reconstruction research has mainly focused on bus–pedestrian collisions [ 6 , 7 , 8 , 9 , 10 ], bus–car collisions [ 11 , 12 ], and collision of multiple buses [ 13 , 14 ]. Two-wheeled vehicle accident reconstructions mainly focus on car–two-wheeled vehicle collisions [ 1 , 15 ]. Reconstruction of TAs involving a bus–two-wheeled vehicle accident is rarely performed.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Research on Accident Reconstruction of Bus–Two-Wheeled Vehicle Based on Vehicle Damage and Human Head Injury

Gao

Wang

et al. 2022

IJERPH

Self Cite

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The problem of large calculation models in bus–two-wheeled vehicle traffic accidents (TA) leads to the difficulty of balancing the calculation efficiency and accuracy, as well as difficulties in accident reconstruction. Herein, two typical accidents were reconstructed, based on the rigid–flexible coupled human model (HM) and the Facet vehicle model, and the vehicle damage conditions and the human head biomechanical injury were analyzed. The simulation results showed that the physical process of the human–vehicle collision was basically consistent with the accident video, the windshield fracture was consistent with the actual vehicle report, and the human biomechanical injury characteristics were also consistent with the autopsy report, which verified the feasibility of the simulation model, and provides a basis and reference for forensic identification and for traffic police to deal with accident disputes.

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An intelligent method for accident reconstruction involving car and e-bike coupling automatic simulation and multi-objective optimizations

Liu

Wan

et al. 2022

Accident Analysis & Prevention

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Reverse reconstruction of two-wheeled vehicle accident based on Facet vehicle model and hybrid human model

Cited by 6 publications

References 25 publications

Influence of car front-end designs on motorcyclists’ trajectory in head-on and side-on-head crashes

Influence of car front-end designs on motorcyclists’ trajectory in head-on and side-on-head crashes

A Research on Accident Reconstruction of Bus–Two-Wheeled Vehicle Based on Vehicle Damage and Human Head Injury

An intelligent method for accident reconstruction involving car and e-bike coupling automatic simulation and multi-objective optimizations

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