Investigation of the Zarnick Non-Linear Mathematical Model of Planing Craft Motions

摘要

The report presents an initial investigation into an analytical method for determining planing craft motions. The severe bow accelerations encountered on planing craft in waves has previously been attributed to the effects produced by slamming impact. It is hypothesized that the motions and accelerations may be due predominantly to the non-linear effects of buoyancy when the upper hull of the craft is plunged into waves. At the transition speed between full planing and full buoyancy conditions normally encountered by planing craft in heavy seas, the buoyancy may well account for severe motions.