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GB/T 30007-2022Ships and marine technology - Guidelines for the assessment of speed and power performance by analysis of speed trial data (English PDF)

船舶和海上技术通过分析测速试航数据以确定速度和功率性能的评估导则

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

October 12, 2022

Implementation date

October 12, 2022

Scope

GB/T 30007-2022 is the English-translated version of 船舶和海上技术通过分析测速试航数据以确定速度和功率性能的评估导则.

GB/T 30007-2022 is the Chinese standard "Ships and marine technology - Guidelines for the assessment of speed and power performance by analysis of speed trial data".

Its scope clause reads: The main purpose of the speed and power trial is to determine the performance of the ship in terms of speed, power and rotational speed under specified conditions, so as to verify the ship's Whether the speed stipulated in the EEDI rules and/or the contract is reached.

Considering the relationship between speed, power and propeller speed, this document defines and specifies the requirements for preparing, implementing, analyzing and reporting ship speed measurements.

The following steps in the sea trial. --- Responsibilities of all parties; --- Sea trial preparation; ---ship status; ---Restricted weather and sea conditions; --- sea trial steps; --- Sea trial implementation; --- Necessary measurements; ---Data collection and recording; --- Evaluation and correction steps; ---Result processing.

The contract speed and EEDI speed are determined in a specific ship condition and draft (contract draft and/or EEDI draft). for For EEDI, the environmental conditions are. no wind, no waves, no current and deep water at 15°C. It is impossible to fully realize the specified conditions in the actual sea trial, so some environmental conditions have to be considered to be corrected, such as water depth, sea surface wind, Waves, currents and ship drafts.

Therefore, in the speed and power trial, it is necessary to measure not only the shaft power and ship speed, but also ship related data and environmental conditions.

This document applies only to displacement ships. In this document, angles are expressed in radians (rad), and speeds are expressed in meters per second (m/s), but degrees (°) can also be used as angles The unit of degree, knot (kn) as the unit of speed.

Therefore, unless otherwise stated, the units of angle and velocity in the calculation formulas are radians (rad) and meters per second (m/s). In addition, for the convenience of users of this document, values in degrees and knots are also given where appropriate.

If the conditions stipulated in this document cannot be met, the actual operation can be carried out according to the written agreement reached by the shipowner, the verifier and the shipyard.

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Document preview — GB/T 30007-2022

National Standard of the People's Republic of China

ICS: 47.020.01
Classification: U 10
Replacing: GB/T 30007-2013

Issued by: State Administration for Market Regulation, China National Standardization Administration

Preface
Introduction
1 Scope
2 Normative references
3 Terms and Definitions
4 Symbols and abbreviations
4.1 Symbol
4.2 Abbreviations
5 Responsibilities
5.1 Responsibilities of the shipyard
5.2 Responsibilities of the sea trial team
6 sea trial preparation
6.1 Step 1.Installation and Calibration
6.2 Step 2.Speed/power trial plan and pre-sea trial meeting
7 Ship Status
7.1 Displacement
7.2 Trim
7.3 Hull and propeller
8 Sea Trial Boundary Conditions
8.1 Area
8.2 Wind
8.3 Sea state
8.4 Water depth
8.5 Stream
9 sea trial step
9.1 Parameters to be recorded
9.2 Parameters measured during each voyage
9.3 Parameters measured at the speed test location
9.4 General information
9.5 Tank test information
9.6 Measurement scope and implementation
10 Sea Trial Implementation
10.1 Preparation
10.2 Trajectories of ships during sea trials
10.3 Voyage duration
10.4 Sea trial direction
10.5 Steering
10.6 Navigation stabilization stage
10.7 Number of voyages
11 Data Acquisition
11.1 General data
11.2 Data per voyage
11.3 Acquisition system
11.4 Manual data collection
12 Analysis step
12.1 Precautions
12.2 Description of analysis steps
13 Result processing
14 report
15 Example of speed test data analysis
Appendix A (Normative) General Information and Sea Trial Record Form
Appendix B (Normative) Beaufort Scale for Wind Speed
Appendix C (Normative) Increased resistance caused by wind
Appendix D (Normative) Increased resistance due to waves
Appendix E (Normative) Effect of Water Temperature and Water Density
Appendix F (Normative) Flow Effects
Appendix G (Normative) Shallow Water Impact
Appendix H (Normative) Displacement Impact
Appendix I (Normative) Conversion of sea trial status to other specified loading status
Appendix J (Normative) Derivation of Variable Load Factor
Appendix K (Normative) Parameter Analysis of Direct Power Method

1 Scope

The main purpose of the speed and power trial is to determine the performance of the ship in terms of speed, power and rotational speed under specified conditions, so as to verify the ship's

Whether the speed stipulated in the EEDI rules and/or the contract is reached.

The following steps in the sea trial.

--- Responsibilities of all parties;

--- Sea trial preparation;

---ship status;

---Restricted weather and sea conditions;

--- sea trial steps;

--- Sea trial implementation;

--- Necessary measurements;

---Data collection and recording;

--- Evaluation and correction steps;

---Result processing.

The contract speed and EEDI speed are determined in a specific ship condition and draft (contract draft and/or EEDI draft). for

For EEDI, the environmental conditions are. no wind, no waves, no current and deep water at 15°C.

It is impossible to fully realize the specified conditions in the actual sea trial, so some environmental conditions have to be considered to be corrected, such as water depth, sea surface wind,

Waves, currents and ship drafts. Therefore, in the speed and power trial, it is necessary to measure not only the shaft power and ship speed, but also ship related data and environmental conditions.

This document applies only to displacement ships.

In this document, angles are expressed in radians (rad), and speeds are expressed in meters per second (m/s), but degrees (°) can also be used as angles

The unit of degree, knot (kn) as the unit of speed. Therefore, unless otherwise stated, the units of angle and velocity in the calculation formulas are radians (rad) and meters per second (m/s). In addition, for the convenience of users of this document, values in degrees and knots are also given where appropriate.

If the conditions stipulated in this document cannot be met, the actual operation can be carried out according to the written agreement reached by the shipowner, the verifier and the shipyard.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references

For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

ITTC7.5-04-01-01.4..2002 ITTC Recommended Practices and Guidelines Speed and Power Sea Trials Part 4.Instrument Installation and

ITTC7.5-02-07-02.2 ITTC recommended procedures and guidelines for power increase model test prediction due to irregular waves (ITTC JT/T 258 | GB/T 37335 | GB/T 20132 | GB/T 30009 | GB/T 30008 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 75 pages — is available in the English PDF.

Referenced standards

Cited by

GB/T 41889-2022Ships and marine technology - Verification method for portable power measurement using a strain gauge

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