狭い流路内で軸流を受ける弾性梁の動的安定性に与える構造諸元の影響(<特集>D&D2009)

概要

論文の詳細を見る
The evaluation methodologies for the flow-induced vibration of an elastic beam due to the axial flow in confined narrow passage are reported. One of authors has already proposed the analytical method using Navier-Stokes equation for the dynamic stability of elastic beam subjected to axial flow in confined narrow passage. In this paper, by using this proposed analytical methods, we perform the numerical studies taking three kinds of support conditions as parameters, that is a cantilever fixed at the upstream side, a cantilever fixed at the downstream side, and a simple supported beam at the both sides, respectively. Moreover, we perform also parameter-studies concerning with a width of annular gap, viscosity of a fluid, and structural damping. And we clarify the effects of support conditions of structures, structural damping, and fluid characteristics on the dynamic stability of an elastic beam due to the axial flow in confined narrow passage for proposing the safety dynamic design guideline concerning axial flow-induced vibration in industries.
2010-05-25