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GB/T 40523.1-2021: Ships and marine technology - Measurement of changes in hull and propeller performance - Part 1: General principles
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Ships and marine technology - Measurement of changes in hull and propeller performance - Part 1: General principles
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GB/T 40523.1-2021
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| GB/T 40523.1-2021 | English | 544 |
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Ships and marine technology - Measurement of changes in hull and propeller performance - Part 1: General principles
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GB/T 40523.1-2021
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Basic data | Standard ID | GB/T 40523.1-2021 (GB/T40523.1-2021) | | Description (Translated English) | Ships and marine technology - Measurement of changes in hull and propeller performance - Part 1: General principles | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | U40 | | Word Count Estimation | 30,337 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 40523.1-2021: Ships and marine technology - Measurement of changes in hull and propeller performance - Part 1: General principles
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Ships and marine technology - Measurement of changes in hull and propeller performance - Part 1.General principles
ICS 47.020.99
CCSU40
National Standards of People's Republic of China
Ship and Offshore Technology Hull and Propeller Performance
Change measurement part 1.general
(ISO 19030-1.2016, IDT)
Released on 2021-08-20
2022-03-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅲ
Introduction Ⅳ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 General principles 2
4.1 Hull and propeller performance 2
4.2 Ship propulsion efficiency and total resistance 2
4.3 Main parameters for measuring changes in hull and propeller performance 3
4.4 Measuring the secondary parameters of hull and propeller performance changes 3
4.5 Measurement procedure 4
5 Performance Index 5
5.1 Dock repair performance. comparison of the hull and propeller performance after this time out of the dock with the average value of previous undocking performance5
5.2 Operational performance. the average change in hull and propeller performance during the interval between undocking and the end of the docking period6
5.3 Maintenance trigger. the change in the average value of the hull and propeller performance movement from the beginning of the docking interval to any selected time 7
5.4 Repair effect. changes in hull and propeller performance before and after the repair event 8
6 Uncertainty and accuracy of performance index measurement 8
Appendix A (Informative) Methods and Assumptions for Evaluating the Uncertainty of Performance Analysis Procedure 10
Reference 23
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document is the first part of GB/T 40523 "Measurement of Hull and Propeller Performance Changes in Ships and Offshore Technology". GB/T 40523
The following parts have been released.
---Part 1.General Provisions;
---Part 2.Default method;
---Part 3.Alternative methods.
The translation method used in this document is equivalent to the ISO 19030-1.2016 “Measurement of Hull and Propeller Performance Changes in Ships and Marine Technology”.
Volume Part 1.General Provisions.
This document has made the following editorial changes.
---Change "Power >0.3" in ISO 19030-1.2016 Table A.1 to "Power >0.3kW".
---Added in the references.
● Equivalent to adopting ISO 19030-2.2016 GB/T 40523.2-2021 ship and marine technology hull and propeller
Performance change measurement part 2.default method;
● Equivalent to adopting ISO 19030-3.2016 GB/T 40523.3-2021 ship and marine technology hull and propeller
Performance change measurement Part 3.Alternative methods.
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents.
This document was proposed and managed by the National Marine Machinery Standardization Technical Committee (SAC/TC137).
Drafting organizations of this document. China State Shipbuilding Industry Comprehensive Technology and Economic Research Institute, China Merchants Cruise Research Institute (Shanghai) Co., Ltd., Shanghai Jiaotong
Tong University, Shanghai Waigaoqiao Shipbuilding Co., Ltd., Shanghai Rongsheng Marine Engineering Technology Co., Ltd., Guangdong Ocean University.
The main drafters of this document. Qi Chao, Wang Huijun, Huang Chao, Ji Chunzheng, Zhao Yong, Guo Shixi, Zhou Long, Zhao Yongsheng, Zhang Rong, Wu Yingyou, Rigorous.
Introduction
The performance of the hull and propeller refers to the difference between the state of the ship's underwater hull and propeller and the power required for the ship to move in the water at a certain speed.
relation. Measure the performance of a specific hull and propeller of a ship over time, which can indicate the maintenance, repair and modification activities of the hull and propeller
The impact on the overall energy efficiency of the ship.
The purpose of this document is to specify practical methods for measuring changes in ship specific hull and propeller performance, and to provide
Repair and modification activities define a set of related performance indicators. These methods are not suitable for comparing different types of ships of different sizes (including sisters).
The performance of the sister ship is also not applicable to the regulatory framework.
This document consists of 3 parts.
---GB/T 40523.1 outlines the general principles of how to measure the
Performance indicators for maintenance, repair and modification activities of propellers.
---GB/T 40523.2 specifies the default method for measuring hull and propeller performance changes and calculating a set of basic performance indicators.
Guide the expected accuracy of each performance index at the time.
---GB/T 40523.3 specifies an alternative to the default method. Some of these methods reduce the overall accuracy, but increase the standard
applicability. Some methods may produce the same or higher overall accuracy, but include elements that have not been widely used in commercial shipping.
The general principles and defined methods outlined in this document are based on common and internationally recognized measurement equipment, information, procedures and methods.
Ship and Offshore Technology Hull and Propeller Performance
Change measurement part 1.general
1 Scope
This document specifies the general principles for the measurement of hull and propeller performance changes, and specifies the maintenance, repair and maintenance of hull and propellers.
Performance indicators for modification activities.
The general principles and performance indicators specified in this document are applicable to all types of ships driven by traditional fixed-pitch propellers.
It is to measure the changes in the performance of the hull and propeller of the same ship over time.
Note. Whether it is applicable to other configurations (such as variable pitch propellers), it will be revised in future standards as needed.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Hull and propeler performance
The relationship between the state of the ship's underwater hull and propeller and the power required by the ship to navigate at a given speed.
3.2
Received power
PD
The power delivered to the propeller (propeller power).
3.3
Speedthroughthewater
The speed of a ship under a given set of sailing (environmental) and loading (displacement/trim) conditions.
3.4
Accuracy
It is described by truthfulness and precision, where truthfulness refers to how close the average value of the measurement result is to the actual (true) value.
Degree refers to how close a single result is to the actual (true) value.
Note. Please refer to the introduction of 3.6 and 0.1 in ISO 5725-1.1994.
3.5
Uncertainty
The probability of measuring to the actual (true) value within the specified accuracy.
3.6
Filtering
Method to delete unnecessary data.
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