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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
- 車椅子マラソンの平地及び下り坂を走行する際の走行姿勢および走行速度が空気抵抗 に与える影響について：:風洞実験と走行シミュレーションから
- タイトル（英）
- Influence of driving posture and driving velocity on wind drag while traveling on flat land and a downward slope in the wheelchair marathon::Wind tunnel experiment and driving simulation
- 参照URL
- https://researchmap.jp/yamanobe_k-180920/published_papers/4116548
- 著者
- 明石 啓太,山辺 芳,白崎 啓太,宮崎 祐介,三井 利仁
- 著者（英）
- Akashi Keita,Yamanobe Kaoru,Shirasaki Keita,Miyazaki Yusuke,Mitsui Toshihito
- 担当区分
- 概要
- The purpose of this study was to clarify the influence of wind drag and the importance of reducing wind drag while traveling over flat ground or down a slope in the wheelchair marathon. Three wheelchair athletes were measured for F<sub>D</sub> (wind drag) while moving themselves in a wheelchair in a wind tunnel, and S<sub>D</sub> (drag area) was calculated from F<sub>D</sub>. The athletes took 4 positions (Position 1: inclining the trunk and gripping the handlebar, Position 2: inclining the trunk and reaching the arm backward, Position 3: raising the trunk and gripping the top dead point of the hand rim, Position 4: inclining the trunk and the bottom dead point of the hand rim) for the measurement, and the relationships between posture and S<sub>D</sub> were investigated. Calculated S<sub>D</sub> was used for estimation of differences in the required power according to the changes in velocity and simulation of driving on a down slope. <br> Position 1 had the smallest S<sub>D</sub> (0.155 ± 0.010 m2) and Position 3 had the largest (0.320 ± 0.021 m2). As Position 3 also had largest sitting height and trunk incline angle, it was considered that the raised trunk posture was subject to wind drag because of the increased forward projection area. Using S<sub>D</sub> and P<sub>T</sub> (total power required to maintain a certain velocity), P<sub>D</sub> (power required to overcome F<sub>D</sub> when driving at a certain velocity) was estimated. It was clarified that when athletes drive at a velocity faster than the win time of the wheelchair marathon men's T54 in the Paralympic Games, P<sub>T</sub> was at least 145.2 W and P<sub>D</sub> accounted for at least 60% of P<sub>T</sub>. Thus, the simulation of driving on the down slope (gradient: 2.5% distance: 200 m and initial velocity: 8.27 m/s) revealed that Position 1 reached 9.00 m/s and Position 4 reached 8.15 m/s at the end of the slope. When Position 1 reached the end of the slope, Position 4 was located 11 m behind Position 1. Therefore, Position 1 is more advantageous than Position 4 in terms of both velocity and distance.
- 概要（英）
- The purpose of this study was to clarify the influence of wind drag and the importance of reducing wind drag while traveling over flat ground or down a slope in the wheelchair marathon. Three wheelchair athletes were measured for F<sub>D</sub> (wind drag) while moving themselves in a wheelchair in a wind tunnel, and S<sub>D</sub> (drag area) was calculated from F<sub>D</sub>. The athletes took 4 positions (Position 1: inclining the trunk and gripping the handlebar, Position 2: inclining the trunk and reaching the arm backward, Position 3: raising the trunk and gripping the top dead point of the hand rim, Position 4: inclining the trunk and the bottom dead point of the hand rim) for the measurement, and the relationships between posture and S<sub>D</sub> were investigated. Calculated S<sub>D</sub> was used for estimation of differences in the required power according to the changes in velocity and simulation of driving on a down slope. <br> Position 1 had the smallest S<sub>D</sub> (0.155 ± 0.010 m2) and Position 3 had the largest (0.320 ± 0.021 m2). As Position 3 also had largest sitting height and trunk incline angle, it was considered that the raised trunk posture was subject to wind drag because of the increased forward projection area. Using S<sub>D</sub> and P<sub>T</sub> (total power required to maintain a certain velocity), P<sub>D</sub> (power required to overcome F<sub>D</sub> when driving at a certain velocity) was estimated. It was clarified that when athletes drive at a velocity faster than the win time of the wheelchair marathon men's T54 in the Paralympic Games, P<sub>T</sub> was at least 145.2 W and P<sub>D</sub> accounted for at least 60% of P<sub>T</sub>. Thus, the simulation of driving on the down slope (gradient: 2.5% distance: 200 m and initial velocity: 8.27 m/s) revealed that Position 1 reached 9.00 m/s and Position 4 reached 8.15 m/s at the end of the slope. When Position 1 reached the end of the slope, Position 4 was located 11 m behind Position 1. Therefore, Position 1 is more advantageous than Position 4 in terms of both velocity and distance.
- 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）
- 一般社団法人 日本体育学会
- 誌名
- 体育学研究
- 誌名（英）
- Taiikugaku kenkyu (Japan Journal of Physical Education, Health and Sport Sciences)
- 巻
- 64
- 号
- 1
- 開始ページ
- 67
- 終了ページ
- 77
- 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.17132
- 共同研究・競争的資金等の研究課題