主機関負荷に与える船体曲げ応力の影響

概要

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It is the purpose of this paper to clarify the influence of longitudinal bending stress on a fluctuation of main engine load. We adopted a stochastic approach using a Multi-variate Auto Regressive (MAR) model in order to analyze vector time series which were obtained in the several on board experiments. And, we derived relative power contributions, impulse response functions and frequency response functions for the stress-engine system from the fitted MAR coefficient matrix. The results of these analysis are as follows. The relative power contribution of the longitudinal bending stress to a power spectrum of a fluctuation of main engine load takes maximum value in quartering seas. And, a strong correlation is observed between them in case that the stress was based on ship motions. Furthermore, according to the result of impulse response functions, the main engine load increases in hogging condition but decreases in sagging condition. In this paper, we describe the outline of these analysis, and discuss a few points about the mechanism of that phenomenon.
社団法人日本航海学会の論文
1994-03-25