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最終更新日：2024/04/09
山辺 芳
ヤマノベ カオル
(Kaoru YAMANOBE)
論文
- タイトル
- 自転車競技の隊列構成人数の違いが並走者に与える空気力学的な影響
- タイトル（英）
- Aerodynamic variation with differences in the number of riders in a cycling group
- 参照URL
- https://researchmap.jp/yamanobe_k-180920/published_papers/24546102
- 著者
- 白﨑 啓太,山辺 芳,明石 啓太,高嶋 渉
- 著者（英）
- Shirasaki Keita,Yamanobe Kaoru,Akashi Keita,Takashima Wataru
- 担当区分
- 概要
- In when riding in a group during cycling competitions, cyclists may become located side-by-side during positioning, rotation, and overtaking. The primary objective of this study was to analyze aerodynamic variation with differences in the number of riders (1 and 3) while cycling in parallel. It was assumed that the last cyclist would be riding in parallel with the immediate leading cyclist in the group. Wind tunnel experiments were implemented using a static mannequin and athletes as participants. A floor-mounted 6-component force balance was employed for conducting the measurements, and the athlete sat on a bicycle mounted on a bicycle stand.
Experiments were subsequently conducted on groups comprising 2 riders (2R) and 4 riders (4R). The aerodynamic drag of the last rider (i.e., the mannequin) was measured for a wind speed of 16.67 m/s and for various relative spatial positions with respect to the front end of the immediate leading rider's front wheel as the origin (longitudinal distance X = -1.38 m–0.07 m, lateral distance Y = 0.25 m–0.90 m; X = -1.38 m was applied solely when Y = 0.90 m for the case of 2R). The results indicated that at Y = 0.75 m–0.90 m, the drag of the last rider for both the 2R and 4R cases was equal to or higher than that for the single state. At Y = 0.50 m, the drag in the 2R case was equal to or higher than that for the single state (maximum value, 108.5% of the single state), whereas the drag in the 4R case was less (87.8–95.1%).
It was also found that when a parallel cyclist approached a riding group comprising 3 or more cyclists, it was possible to decrease the drag to a value less than for the single state by riding in a position strictly adjacent to the riding group. - 概要（英）
- In when riding in a group during cycling competitions, cyclists may become located side-by-side during positioning, rotation, and overtaking. The primary objective of this study was to analyze aerodynamic variation with differences in the number of riders (1 and 3) while cycling in parallel. It was assumed that the last cyclist would be riding in parallel with the immediate leading cyclist in the group. Wind tunnel experiments were implemented using a static mannequin and athletes as participants. A floor-mounted 6-component force balance was employed for conducting the measurements, and the athlete sat on a bicycle mounted on a bicycle stand.
Experiments were subsequently conducted on groups comprising 2 riders (2R) and 4 riders (4R). The aerodynamic drag of the last rider (i.e., the mannequin) was measured for a wind speed of 16.67 m/s and for various relative spatial positions with respect to the front end of the immediate leading rider's front wheel as the origin (longitudinal distance X = -1.38 m–0.07 m, lateral distance Y = 0.25 m–0.90 m; X = -1.38 m was applied solely when Y = 0.90 m for the case of 2R). The results indicated that at Y = 0.75 m–0.90 m, the drag of the last rider for both the 2R and 4R cases was equal to or higher than that for the single state. At Y = 0.50 m, the drag in the 2R case was equal to or higher than that for the single state (maximum value, 108.5% of the single state), whereas the drag in the 4R case was less (87.8–95.1%).
It was also found that when a parallel cyclist approached a riding group comprising 3 or more cyclists, it was possible to decrease the drag to a value less than for the single state by riding in a position strictly adjacent to the riding group. - 出版者・発行元
- 一般社団法人 日本体育学会
- 出版者・発行元（英）
- Japan Society of Physical Education, Health and Sport Sciences
- 誌名
- 体育学研究
- 誌名（英）
- Taiikugaku kenkyu (Japan Journal of Physical Education, Health and Sport Sciences)
- 巻
- 64
- 号
- 2
- 開始ページ
- 637
- 終了ページ
- 645
- 出版年月
- 2019年
- 査読の有無
- 査読有り
- 招待の有無
- 掲載種別
- ISSN
- 0484-6710
- DOI URL
- https://doi.org/10.5432/jjpehss.18086
- 共同研究・競争的資金等の研究課題