Abstract
When the ship may be considered as an elementary beam, many methods exist for calculating the natural frequencies from a known mass- and stiffness distribution. One of these is elucidated in this paper. The method is well-suited for calculating more than one natural frequency of the ship. Shear stiffness and rotary enertia can be taken into account.
The presentation in this paper is entirely tuned to the use of an electronic digital computer with a modern programme library. The cost of a calculation with such a machine is given; it proves to be remarkably low.
The accuracy of the method is very satisfactory. It is illustrated in three test problems.
Part of the mathematical treatment may be new.
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