Cross-Bispectral Analysis: Application to Ship Resistance in Waves

Abstract

The objective of the present work has been to demonstrate by analyses of experimental data that a postulated quadratic functional polynomial model is a reasonable representation of the added ship resistance produced by waves. The evidence so far produced is fairly strong that this is so, and that the model shows considerable promise as a unifying concept for the analysis and interpretation of added ship resistance in random waves. In the course of the work cross-bispectral analysis methods were developed and applied to the derivation of or "identification" of the "added resistance operator" from data obtained in irregular waves. These methods appear to have further promise as a research tool, but, at their present stage of development, do not appear to be an efficient testing tool.