GB/T 41890.1-2022 Active National standards

GB/T 41890.1-2022 Ships and marine technology—Model test method for propeller cavitation noise evaluation in ship design—Part 1:Source level estimation

Publish Date: 2022-10-12 Implement Date: 2022-10-12 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 41890.1-2022

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Main and auxiliary engines for ships

ICS Name: Maritime engines and propulsion systems

Publish Date: 2022-10-12

Implement Date: 2022-10-12

Pages: 15 pages

Scope

This document describes the model test method for evaluating the sound source level of propeller cavitation noise during the ship design process.
The test process includes noise source simulation, noise measurement, data post-processing, and full-scale prediction. The target noise source of this test is propeller cavitation noise. Therefore, this document details the preparation and conditions for simulating the propeller cavitation noise characteristics of ships based on the similarity principle between models and full-scale ships. The propeller noise measurement is divided into three stages: propeller cavitation noise measurement, background noise measurement, and full-scale prediction. In order to more accurately evaluate the sound source level of cavitation noise, the propeller cavitation noise measured in the test needs to be subjected to signal-to-noise ratio and sound field environment correction. Finally, based on the similarity relationship between models and full-scale ships, the sound source level of propeller cavitation noise on the prototype ship is predicted.
This document is applicable to the evaluation of the sound source level of propeller cavitation noise during the ship design process.