Efek Resonansi-Tacoma Narrow Bridge dan Millenium Bridge
Kenapa harus belajar Matematika? Kenapa harus belajar Kimia organik? Kenapa dalam otak yang sama, harus ada dua-duanya? (Kalau mau jadi engineer tentunya...) hehe..
Coba klik ini. Para engineer kelas berat di San Fransisco seharusnya sudah menghitung segala macam hal yang mungkin terjadi pada Tacoma Narrow Bridge sebelum ini dipakai.http://www.enm.bris.ac.uk/research/nonlinear/tacoma/tacnarr.mpg
Dan telah menjadi insiden yang memalukan bagi London saat pembukaan pertama jembatan cantik Millenium Bridge.http://www.galinsky.com/buildings/millenniumbridge/
Hehe..copy-paste dari wikipedia.com
http://en.wikipedia.org/wiki/London_Millennium_Bridge
The bridge was completed at a cost of £18.2m (£2.2m over budget) and opened on June 10, 2000 (2 months late) but unexpected lateral vibration (resonant structural response) caused the bridge to be closed on June 12 for modifications. The movements were produced by the sheer numbers of pedestrians (90,000 users in the first day, with up to 2,000 on the bridge at any one time). The initial small vibrations encouraged the users to walk in synchronisation with the sway, increasing the effect. This swaying motion earned it the nickname the Wobbly Bridge
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