251 空力振動する三次元正方形角柱の圧力変動場に関する研究 : POD解析のモードに着目した検討

概要

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This paper describes characteristics of air pressure variation field on the surface of the 3-dimentional square prism under aerodynamic vibration. The analysis is conducted by means of Proper Orthogonal Decomposition. The improved hybrid aerodynamic vibration technique is used to measure the air pressure. As a result, two typical modes, which are symmetrical mode and inversely symmetrical mode, are included in the POD mode. It is found out that the inversely symmetrical mode is a governing mode to generate the aerodynamic vibration, and in the case of generating Vortex Induced Vibration or Galloping Vibration, we can distinguish these phenomena from the information of phase angle distribution of inversely symmetrical mode.
一般社団法人日本機械学会の論文
2011-09-05