机械振动.船上振动的测量.第2部分:机构振动的测量

[中文适用范围]： 本部分 ISO 20283 提供了指南，并规定了测量、诊断评估和报告由推进装置激发的船舶结构振动的要求和程序。结构振动可以是全局性的或局部性的。此处主要处理全局振动。从宜居性角度出发的甲板结构局部振动在 ISO 6954 中处理。导致疲劳损坏的局部振动发生很少，且与个别配置密切相关。因此，在 ISO 20283（所有部分）的范围内不提供此类振动测量的通用指南。作为参考，在附录 D 中提供了一些关于结构设计的与局部结构振动相关的基本信息。本部分 ISO 20283 不考虑瞬态船舶振动现象，例如由拍击激发的振动。尽管扭转轴或曲轴振动在某些情况下可能导致相关的结构振动，但此处不予考虑。在此方面，可参考相关的船级社规则和 ISO 20283-4。 [外文原描述]： ISO 20283-2:2008 gives guidelines, and specifies requirements and procedures for the measurement, diagnostic evaluation and reporting of structural vibration of ships, excited by the propulsion plant. Structural vibration can be of global or of local nature. Here, primarily global vibration is dealt with. Local vibration of deck structures from a habitability point of view is dealt with in ISO 6954. Occurrence of local vibration leading to fatigue damage is rare and strongly related to the individual configuration. Therefore, no general guideline for the measurement of such type of vibration is provided within the scope of ISO 20283 (all parts). For reference, some basic information regarding the design of structures with respect to local structural vibration is provided. ISO 20283-2:2008 does not consider transient ship vibration phenomena, e.g. , as excited by slamming. Even though torsional shaft or crankshaft vibration may in some cases cause relevant structural vibration, they are not considered here. In this connection, reference can be made to the relevant classification rules and ISO 20283-4.