フルテキストファイル
著者
田村 篤敬 Department of Mechanical and Aerospace Engineering, Tottori University 研究者総覧 KAKEN
Hasegawa, Junji Department of Intelligent Mechanical Systems, Tokyo Metropolitan University
小出 隆夫 Department of Mechanical and Aerospace Engineering, Tottori University 研究者総覧 KAKEN
抄録
A series of pedestrian sideswipe impacts were computationally reconstructed; a fast-walking pedestrian was collided laterally with the side of a moving vehicle at 25 or 40 km/h, which resulted in rotating the pedestrian’s body axially. Potential severity of traumatic brain injury (TBI) was assessed using linear and rotational acceleration pulses applied to the head and by measuring intracranial brain tissue deformation. We found that TBI risk due to secondary head strike with the ground can be much greater than that due to primary head strike with the vehicle. Further, an ‘effective’ head mass, meff, was computed based upon the impulse and vertical velocity change involved in the secondary head strike, which mostly exceeded the mass of the adult head-form impactor (4.5 kg) commonly used for a current regulatory impact test for pedestrian safety assessment. Our results demonstrated that an SUV is more aggressive than a sedan due to the differences in frontal shape. Additionally, it was highlighted that a striking vehicle velocity should be lower than 25 km/h at the moment of impact to exclude the potential risk of sustaining TBI, which would be mitigated by actively controlling meff, because meff is closely associated with a rotational acceleration pulse applied to the head involved in the final event of ground contact.
出版者
American Society of Mechanical Engineers
資料タイプ
学術雑誌論文
外部リンク
ISSN
23329017
EISSN
23329025
掲載誌名
ASCE-ASME JOURNAL OF RISK AND UNCERTAINTY IN ENGINEERING SYSTEMS PART B-MECHANICAL ENGINEERING
4
4
発行日
2018-12
出版者DOI
著者版フラグ
著者版
著作権表記
(C) ASME. This work is made available under the terms of the Creative Commons Attribution 4.0 International license, http://creativecommons.org/licenses/by/4.0/.
掲載情報
Tamura Atsutaka, Hasegawa Junji, Koide Takao. Comparative Analysis on Traumatic Brain Injury Risk Due to Primary and Secondary Impacts in a Pedestrian Sideswipe Accident. ASCE-ASME JOURNAL OF RISK AND UNCERTAINTY IN ENGINEERING SYSTEMS PART B-MECHANICAL ENGINEERING. 2018. 4(4). doi:10.1115/1.4039464
部局名
工学部・工学研究科
言語
英語
Web of Science Key ut
WOS:000448247000004