COMPUTATIONAL FLUID DYNAMICS SIMULATION AND STABILITY ANALYSIS OF VEHICLE ON BRIDGE UNDER STRONG WINDS
- 1 January 2021
- journal article
- Published by Japan Society of Civil Engineers in Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE))
- Vol. 77 (1), 107-120
- https://doi.org/10.2208/jscejseee.77.1_107
Abstract
本研究は，まず，Large Eddy Simulation (LES)により橋桁上にある車両の周辺流を再現し，車両に対する空気力を求め，次に，その空気力を用いた車両の動力学的安定解析から横転，横滑り，ヨーイング現象の発生限界風速を求めている．その結果，1）車両周りの流れ場は，橋桁の端部から剥離するせん断流の影響を強く受け，車両の車線位置により流れ場が大きく変わり，そのため車両に作用する空気力特性も大きく異なる．次に，2）5質点7自由度の車両モデルに，得られた空気力を作用させ，横転，横滑り，ヨーイングの不安定モードの発生限界風速を求め，3）3つのうち，ヨーイングが支配的な不安定モードであり，限界風速は風上側車線に位置するときが最も低く，風下側車線に位置が変わるにつれ高くなることが分かった．Keywords
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