AN INITIAL-VALUE PROBLEM FOR THE MOTION OF A SHIP MOVING WITH CONSTANT MEAN VELOCITY IN AN ARBITRARY SEAWAY
Abstract
The motion of a freely floating or submerged body, which is moving with a constant average forward speed and oscillating arbitrarily in any of the six degrees of freedom, is formulated as an initial-value problem. The seaway is assumed to be arbitrary. The body is assumed to be 'smooth', but no symmetry of the body is required. The fundamental assumption is that both the free-surface disturbance due to forward motion of the body and the oscillations are small enough so that the problem may be linearized. By an approach similar to that of Wehausen (1965), it is shown how the present treatment of the problem leads also to Ogilvie's (1965) modified results of Cummins' (1962) decomposition of the velocity potential for the case of an oscillating body with a constant average forward speed. The linearized equations of motion of the body are then derived as a set of six integro-differential equations. Existence and uniqueness theorems are not established either for the boundary-value problem or for the integral equation which is constructed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1966
- Accession Number
- AD0803983
Entities
People
- Wen-chin Lin
Organizations
- University of California, Berkeley