Kajian Eksperimental Soft Flutter Pada Model Seksional Jembatan


Aeroelastic testing of a sectional bridge model in a wind tunnel with scale 1:20 had been conducted. The model was tested to study the characterictis of aeroelastics dynamic, such as Vortex Induced Vibration (VIV) and flutter. Based on the testing, phenomenon soft flutter was found in the test. Soft flutter has different characteristics as classical or hard flutter. In hard flutter, there are  obvious divergence point, which is the point of wind speed when  the amplitude increases suddenly and might be catastrophic. In soft  flutter phenomenon, the vibration amplitude increases gradually as increasing of wind speed. In this paper, the characteristics of soft flutter on a model will be described and the method to determine its critical flutter speed.

Keywords: Aeroelastic, flutter, divergence, critical flutter speed


Pengujian aeroelastika di terowongan angin pada model seksional jembatan dengan skala 1:20 dilakukan untuk mengetahui karakteristik aeroelastika dinamik, yaitu Vortex Induced Vibration (VIV) dan flutter. Berdasarkan hasil pengujian terlihat fenomena flutter yang terjadi adalah soft flutter. Fenomena soft flutter berbeda dengan classical flutter atau hard flutter, dimana pada hard flutter terdapat titik divergen yang jelas. Pada hard flutter titik divergen ditandai dengan naiknya amplitudo menjadi sangat besar secara tiba-tiba dan dapat mengakibatkan kerusakan yang fatal. Pada soft flutter amplitudo getaran akan meningkat secara bertahap dengan bertambahnya kecepatan angin. Makalah membahas karakteristik soft flutter yang terjadi dan metode untuk menentukan kecepatan kritis flutter.

Kata kunci : Aeroelastika, flutter, divergen, kecepatan kritis flutter



Fariduzzaman dan Leonardo Gunawan. Flutter Margin Determination of A Long span Bridge. Journal of 4th Pacific International Conference on Aerospace Science and Technology. 2001

Sun Yanguo, Haili Lia,dan Mingshui L. Experimental Study on Flutter Performance of a 1700m Long Truss Girder Suspension Bridge. Journal of Advance in Civil, Enviromental, and Materials Research (ACEM16). 2016

ZhangMing-Jie , Fu-You Xu,dan Xu-Yong Ying. 2016. Experimental Investigations on the Soft Flutter of a Bridge Deck. Journal of Advance in Civil, Enviromental, and Materials Research(ACEM16). 2016

Wright, Jan R dan Jonathan E. Copper. Introduction to Aircraft Aeroelasticity and Loads. John Wiley & Son, Ltd. 2007

E. Simiu, R H. Scanlan. Wind Effects on Structures. 2nd Ed, New York. John Wiley & Sons.1986

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