Properties of single shear layer instabilities and vortex-induced excitation mechanisms of thick plates

Added mass and wave radiation damping for flow-induced rotational vibrations of skinplates of hydraulic gates

“…(1) Instability-induced excitation, due to a fluid instability (frequently linked to the fluid viscosity) as is the case in vortex shedding, as discussed, for example, in Bearman (1984), Nguyen and Naudascher (1986), Jongeling (1988), Billeter (2004) and Billeter and Staubli (2000); and, (2) movement-induced excitation, involving an initiating impulsive or vibratory structural motion such as a structural vibration mode or the coupling of multiple structural modes that produces a fluid perturbation which in turn reinforces the structural motion, as discussed, for example, in Ishii and Imaichi (1977) and Ishii and Naudascher (1992).…”

Modeling of fluid-induced vibrations and identification of hydrodynamic forces on flow control valves

“…Many studies have been undertaken to determine this mechanism and the optimum lower edge shape minimizing flow-induced vibrations [10,13]. Experimental research on this mechanism for a rectangular plate with two degrees of freedom was done by MAUDASCHER and ROCKWELL [14] and BILLETER [15] who found that the vibrations were caused by two phenomena: the streamline impinging-leading-edge-vortex (SILEV) mechanism and the instability of the shear layer (ISL) in the tail water.…”