WORKABILITY LIMITS AND FATIGUE ASPECTS ON A FAST PATROL VESSEL

摘要

Full scale measurements and observations were made onboard Her Majesty's Customs and Excise Cutter "Valiant". Objective of these measurements and observations was to find, with respect to the motion climate, practical limits to the use of this class of vessels. The measurements were carried out in December 2004 in the Irish Sea near Glasgow so that there was some guarantee of a significant sea state in the short measurement period available (i.e. only 3 days). This paper presents the results of the measurements on board the "Valiant" and discusses the analysis of the signals and the results of the observations on board, aimed at relating the motions to the human performance and comfort on board. The analysis is largely based on the approach as given in the ISO 2631:1997 standard "Evaluation of human exposure to whole body vibration"; notably the root-mean-quad is used for the extreme events and the Vibration Dose Value is used to quantify fatigue on board. The problem of finding acceptable limits of the VDV for this crew of professionals will be discussed. One result of the observations is the importance of crew fatigue over a longer period compared to direct performance degradation due to the motion climate.