理論的メカニズム:ミレニアム・ブリッジの群衆シンクロニー
Steven H Strogatz1, Daniel M Abrams, Allan McRobie
1Department of Theoretical and Applied Mechanics, Cornell University, Ithaca, New York 14853-1503, USA. strogatz@cornell.edu
Nature
|November 4, 2005
まとめ
ロンドンのミレニアム・ブリッジの歩行者は歩みを同期させ,その揺れを拡大した. この研究は,生物学的振動器の原理を使用して,群衆によって引き起こされる振動に対する橋の安定化を支援するために,現象をモデル化しています.
科学分野:
- 土木工学 土木工学とは
- 物理 物理学 物理学とは
- 応用数学 応用数学
背景:
- ロンドンのミレニアム・ブリッジは,歩行者の足跡のために開通時に大きな横の振動を経験しました.
- 当初の理論では,橋の革新的な設計によって揺れ動いたが,これは後に否定された.
研究 の 目的:
- 歩行者が引き起こした橋の揺れ現象をモデル化するために.
- 歩行者の集合的同期を,貢献する要因として理解する.
- エンジニアに,混雑した歩行橋を安定させる方法を提供する.
主な方法:
- 適応された数学的モデルは,もともとは生物学的振動器 (例えば,ニューロン,) の集合的同期のために開発された.
- ミレニアム・ブリッジの歩行者による振動を分析するためにこれらのモデルを適用しました.
主要な成果:
- この研究は,ミレニアム・ブリッジの悪名高い横横の揺れを成功裏にモデル化しました.
- 橋の自然周波数との歩行者の同期が,設計ではなく,主な原因として特定されました.
- このモデルは,そのような現象を理解し予測するための枠組みを提供します.
結論:
- 群衆の同期は,歩行橋のダイナミックな反応の重要な要因です.
- 適応モデリングアプローチは,エンジニアが効果的な減圧システムを設計するために貴重なツールを提供します.
- この研究は,歩行者の集団行動によって引き起こされる過剰な橋の振動の将来の発生を防ぐのに役立ちます.
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