Large-amplitude and narrow-band vibration phenomenon of a foursquare fix-supported flexible plate in a rigid narrow channel

An experiment was performed to analyze the flow-induced vibration behavior of a foursquare fix-supported flexible plate exposed to the axial flow within a rigid narrow channel. The large-amplitude and narrow-band vibration phenomenon was observed in the experiment when the flow velocity varied with the range of 0–5 m/s. The occurring condition and some characteristics of the large-amplitude and narrow-band vibrations were investigated.

► FIV of a foursquare fix-supported flexible plate exposed to axial flow was studied.
► Special designed test section and advanced measuring equipments were adopted.
► The narrow-band vibration phenomenon with large amplitude was observed.
► Line of plate's vibration amplitude and flow rate was investigated.
► The phenomenon and the measurement error were analyzed.