标准摘要
[中文适用范围]： 本文件概述了替代默认方法的选项。其中一些将导致整体准确性降低，但增加了标准的应用性。其他情况下可以达到相同或更高的整体准确性，但包括尚未在商业航运中广泛应用的元素。本文档所阐述的一般原则和性能指标适用于所有由传统固定桨距螺旋桨驱动的船型，其目标是比较同一船舶在其自身随时间的变化中的船体和推进器性能。本文件在第4条中提出替代测量参数（首先是一级然后是二级），在第5条中提出替代测量程序（包括替代参考和评估时期），在第6条描述性能指标的计算方法，最后在第7条估计性能指标准确性。所使用的结构与ISO 19030-2的结构相同，以促进两份文件之间的互引。 如果合理，对额外配置的支持（例如可变桨距螺旋桨）将包含在未来版本的本文件中。 [外文原描述]： ISO 19030-3:2016 outlines alternatives to the default method. Some will result in lower overall accuracy but increase applicability of the standard. Others can result in same or higher overall accuracy but includes elements which are not yet broadly used in commercial shipping. The general principles outlined and performance indicators defined are applicable to all ship types driven by conventional fixed pitch propellers, where the objective is to compare the hull and propeller performance of the same ship to itself over time. ISO 19030-3:2016 presents alternatives to measurement parameters (primary and then secondary) in Clause 4, then alternatives to measurement procedures (including alternative reference and evaluation periods) in Clause 5, describes the calculation of performance indicators in Clause 6, and finally the estimation of performance indicator accuracy in Clause 7. The structure used duplicates the structure of ISO 19030‑2 to facilitate cross-reference between the two documents. NOTE Support for additional configurations (e.g. variable pitch propellers) will, if justified, be included in later revisions of this document.
英文名称Ships and marine technology — Measurement of changes in hull and propeller performance — Part 3: Alternative methods