圧電素子による薄板に作用する衝撃圧力の測定

抄録

Impulsive pressure induced on a thin plate by fluid flow is measured by piezoelectric ceramics. Two piezoelectric ceramic transducers are put on the inner side of a plate in contact with fluid and the outer side. The output voltages from each of the piezoelectric ceramics are summed to cancel the effect of the plate-bending deformation. The summation of voltage histories is converted to impulsive pressure according to the calibration of piezoelectric ceramics by the longitudinal impact test. A generator of impulsive pressure is constructed to verify this method. As experimental results, this method can measure impulsive pressure on a thin plate without changing the rigidity of the thin plate, in as far as the plate is deformed by bending.