Abstract
As a fundamental problem of the local vibration of Ship, I investigated the vibration of a rectangular plate with N columns whose spring constants are k1, k2, …kN-1 and kN, and the coupled vibration of N rectangular plates which are connected by (N-1) columns whose spring constants are k1, k2…, kN-2, and kN-1.
First, I calculated natural frequencies of free vibration, then, I studied the best position of columns when plates are under some external forces.
