GB/T 28784.2-2014Mechanical vibration -- Measurement of vibration on ships -- Part 2: Measurement of structural vibration (English PDF)
机械振动 船舶振动测量 第2部分：结构振动测量
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Issued by
General Administration of Quality Supervision, Inspection and Quarantine
Level / Type
National · Recommended
Issue date
June 24, 2014
Implementation date
March 1, 2015
Scope
GB/T 28784.2-2014 is the English-translated version of 机械振动 船舶振动测量 第2部分：结构振动测量.
GB/T 28784.2-2014 is the Chinese standard "Mechanical vibration -- Measurement of vibration on ships -- Part 2: Measurement of structural vibration".
Its scope clause reads: This Part of GB/T 28784 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 GB/T 7452.
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 this Standard (all parts).
For reference, some basic information regarding the design of structures with respect to local structural vibration is provided in Annex D. This Part does not consider transient ship vibration phenomena, e.g., as excited by slamming.
Even though torsional shaft or crankshaft vibration can 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 Part 4 of this Standard. Its clauses include terms and definitions.
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Document preview — GB/T 28784.2-2014
National Standard of the People's Republic of China
- ICS
- 17.160
- Classification
- J 04
Issued by: General Administration of Quality Supervision, Inspection and Quarantine
Contents
- Foreword3
- Introduction5
- 1 Scope6
- 2 Normative references6
- 3 Terms and definitions6
- 4 Measurement conditions and manoeuvres7
- 5 Measurement positions9
- 6 Signal acquisition, processing and storage9
- 7 Test report10
- Annex A12
- Annex B14
- Annex C16
- Annex D20
- Bibliography21
1 Scope
This Part of GB/T 28784 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 GB/T 7452. 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 this Standard (all parts). For reference, some basic information regarding the design of structures with respect to local structural vibration is provided in Annex D.
This Part does not consider transient ship vibration phenomena, e.g., as excited by slamming.
Even though torsional shaft or crankshaft vibration can 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 Part 4 of this
Standard.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2041 Mechanical vibration, shock and condition monitoring -
Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2041 and the following apply. […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 21 pages — is available in the English PDF.
Referenced standards
Normative references
ISO 2041
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Related Standards
GB/T 28784.3-2012 — Mechanical vibration -- Measurement of vibration on ships -- Part 3: Pre-installation vibration measurement of shipboard equipment
GB/T 28784.4-2017 — Mechanical vibration -- Measurement of vibration on ships -- Part 4: Measurement and evaluation of vibration of the ship propulsion machinery
GB/T 28784.5-2022 — Mechanical vibration - Measurement of vibration on ships - Part 5: Guidelines for measurement, evaluation and reporting of vibration with regard to habitability on passenger and merchant ships
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