This thesis presents the investigation for the transverse vibration of rectangular plates having circular holes in air and in water.
The systematic experiments are carried out to investigate the effects due to the change of number, space and distribution of holes.
All the test plates have the same area ratio, i.e., ratio of hole area to plate area. The holes are made symmetrically about the centerline of the plates. The outer boundaries are all clamped and inner boundaries are free.
Some of the results are as follows;
(1) When the plate having circular holes exists in air and in water, the nondimensional fundamental frequency parameter of the plate is similar to that of the plate having a circular hole of the same area ratio within 15% range.
(2) As the space between the holes of two hole plate increases, the nondimensional fundamental frequency parameter decreases in air and in water. The differences are within 15% range as compared to the nondimensional fundamental frequency parameter of the plate having a circular hole of the same area ratio.
(3) The nondimensional fundamental frequency parameter of the rectangular plates having circular holes in water can be estimated within 15% range from the results of those plates in air by using the nondimensional mass increment parameters, or from the results of no hole plate in water by using the effects of number of holes.
