GB/T 28784.2-2014 in English

《GB/T 28784.2-2014机械振动 船舶振动测量 第2部分：结构振动测量》由TC53（全国机械振动、冲击与状态监测标准化技术委员会）归口，主管部门为国家标准化管理委员会。
GB/T 28784的本部分提出了对推进装置引起的船舶结构振动进行测量、诊断性评价和报告的指南，规定了相应的要求和方法。结构振动可表现为具有总体特征或局部特征的振动，本部分主要涉及总体特征的振动。GB/T 7452从适居性角度涉及甲板结构的局部振动。局部振动主要取决于自身的结构形式，并很少引起疲劳损坏，因此，本标准（所有部分）没有提出此类振动测量的一般指南。作为参考，在附录D中提供了结构设计中关于局部结构振动的相关内容。 本部分不考虑船舶瞬态振动，例如，砰击引起的振动。 本部分不涉及轴系扭振或曲轴振动可能引起的结构振动，相关内容可参考船级社规范和本标准的第4部分。

Scope

This part of GB/T 28784 proposes guidelines for the measurement, diagnostic evaluation and reporting of ship structural vibrations caused by propulsion devices, and specifies the corresponding requirements and methods. Structural vibration can be manifested as vibration with overall characteristics or local characteristics. This section mainly involves vibration with overall characteristics. GB/T 7452 deals with local vibration of deck structures from the perspective of habitability. Local vibration mainly depends on its own structural form and rarely causes fatigue damage. Therefore, this standard (all parts) does not propose general guidelines for such vibration measurements. For reference, relevant content on local structural vibration in structural design is provided in Appendix D. This section does not consider the transient vibration of the ship, for example, the vibration caused by slamming. This section does not involve structural vibrations that may be caused by shafting torsional vibrations or crankshaft vibrations. For relevant content, please refer to the classification society rules and Part 4 of this standard.