STUDY ON FLOW-INDUCED VIBRATION OF A LAMINATED-PLATE-TYPE STRUCTURE

The pipe theory is introduced into the flow-induced vibration research of a plate-type structure. The mechanical model is set to describe the plate-type structure in potential flow. The dynamic equation is deduced based on Hamilton principle. The differential quadrature method is used to solve the differential equations. The system’s natural frequencies and modes are investigated when the flow’s velocity is zero. The critical velocity and the form of instability are studied by the means of eigenvalue analysis and response analysis. The results show that the cantilevered model has the flutter instability over the critical velocity, the fixed model has buckling instability over the critical velocity.