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GB/T 45901-2025: Ships and marine technology - Full-scale test method for propeller cavitation observation and hull pressure measurement
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GB/T 45901-2025: Ships and marine technology - Full-scale test method for propeller cavitation observation and hull pressure measurement

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ICS 47.020.20 CCSU47 National Standard of the People's Republic of China Ship and marine technology propeller cavitation observation and Full-scale test method for hull pressure measurement (ISO 22098.2020, IDT) Released on June 30, 2025 Implementation on January 1, 2026 State Administration for Market Regulation The National Standardization Administration issued

Preface

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is equivalent to ISO 22098.2021 “Ships and marine technology – Full-scale test instruments for propeller cavitation observation and hull pressure measurement”. Test Methods". Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed and coordinated by the National Technical Committee for Standardization of Marine Machinery (SAC/TC137). This document was drafted by. China Shipbuilding Industry Corporation Comprehensive Technology and Economic Research Institute, Zhenjiang Tongzhou Propeller Co., Ltd., Tianjin Hao Ye Technology Co., Ltd., China Merchants Industrial Technology (Shanghai) Co., Ltd., Harbin Engineering University, Shanghai Jiao Tong University, Tianjin Hanhai Blue Sail Marine Technology Co., Ltd., Jiangsu University of Science and Technology, Wuhan University, and COSCO Shipping Bulk Co., Ltd. The main drafters of this document are. Sun Meng, Ji Wei, Wang Chao, Han Ye, Tian Zhengjun, Hu Chuanlin, Zhao Yong, Yan Liang, Sun Cong, Wang Benlong, Yang Chenjun, Wang Changqiang, Zhang Minge, Zhang Jian, Hua Shi, Cheng Huaiyu, Long Xinping, Zhang Yongliang, and Xie Kun. Ship and marine technology propeller cavitation observation and Full-scale test method for hull pressure measurement

1 Scope

This document specifies a full-scale test method for propeller cavitation observation and hull pressure measurement. The purpose of the test is to study the propeller cavitation Characteristics and their impact on hull vibration. The test method includes test instruments and equipment, structural requirements to ensure structural safety, test and measurement procedures, and report documentation. This document is applicable to ships in the following stages. --- Before or during sea trials, before the delivery stage (for ships under construction); ---After the delivery phase.

2 Normative references

This document has no normative references.

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 measured ship speed The ship's speed (3.4) is calculated from the distance between the starting position and the ending position and the running time within the speed measurement cycle. 3.2 observation window Transparent window for observing and investigating cavitation phenomena in ship propellers. 3.3 propeller plane A plane perpendicular to the axis and containing the propeller reference line and the reference line of the root section point. 3.4 Ship speed shipspeed The speed achieved by a vessel under specified conditions. 3.5 Sidescuttle Circular or oval openings with an area not exceeding 0.16m2. Note. A circular or oval opening with an area exceeding 0.16 m2 is a “window”. For specific definitions, see IACSU ILL 62 or IMO Resolution MSC.143 (77). 3.6 Sea chest seachest A device installed in the hull below the waterline for taking in or out water. ...