Ship structure vibration and noise forecasting system based on S-P-R

Abstract

The invention provides a ship structure vibration and noise forecasting system based on S-P-R, comprising a database module, a modeling and calculating module, and a result processing module. The database module stores the vibration intensity data of various kinds of vibration sources in each cabin of a ship, and the noise intensity data of various kinds of noise sources; the modeling and calculating module comprises a ship modeling submodule, a key excitation source recognition submodule, a transmission path determination submodule, and a receiving station energy calculating module, and is used for defining transmission paths, calculating the transmission loss of the vibration / noise energy generated by each excitation source by the transmission to a receiving station along a transmission path, and then calculating the vibration / noise total energy of the receiving station. The system of the invention combines an analysis method, a numerical method and an experimental method to analyze ship structure vibration source and transmission path characteristics, calculates cabin air noise levels according to the analysis procedure of an S-P-R method, and overcomes the problem that corresponding remedial measures can not be taken according to vibration and noise measurement results until a ship is completed.

Description

technical field [0001] The invention belongs to the technical field of ship design and construction, and in particular relates to an S-P-R-based ship structure vibration and noise forecasting system. Background technique [0002] Ship noise and vibration not only damage the health of the crew, hinder the normal work of the crew, but also easily cause fatigue and damage to the hull structure, so it is necessary to control ship noise and vibration. Especially as IMO and various classification societies have stricter restrictions on ship structural vibration and cabin noise, ship engineers and technicians have carried out a series of studies on ship structural vibration and structural sound transmission mechanisms, and put forward corresponding mitigation measures. Vibration and noise reduction measures, the research scope ranges from simple typical ship connection structure to the whole ship structure vibration, from a single plane wave to multiple non-plane waves coupled with...

AI Technical Summary

Problems solved by technology

[0026] Aiming at the defects existing in the prior art, the present invention provides a ship structural vibration and noise forecast system based on S-P-R, which overcomes the problem that corresponding remedial measures can be taken according to the measurement results of vibration and noise only after the ship is completed, and reduces the vibration and noise of the ship. The measurement cost saves the corresponding technical transformation cost, and greatly reduces the technical risk of being fined because the ship's vibration and noise do not meet the standards

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