Application Of Underwater Noise Propagation Model Marine Engineering

In the marine environment,sound waves are the main way of transmitting information.An important acoustic feature of the ocean is ocean noise.The study of ocean noise is of great significance.In the ocean noise,human noise has a great impact on marine organisms,especially the piling construction in marine engineering has a certain impact on marine organisms and benthos.Therefore,it is necessary to predict and analyze the underwater noise generated in marine engineering.This paper analyzes mathematical model of the underwater noise generated during various construction stages of marine engineering and the noise in the air under different conditions,and determines the mathematical model of the loss of the propagation of underwater noise on the basis of the propagation characteristics of underwater noise and the combination of empirical formulas and eigenvalue solutions to the sound field.In the pile driving noise propagation model,combined with various environmental parameters,a model is established to make the results of mathematical models more close to real data,making the prediction data more accurate.The underwater noise data processing and noise prediction functions are realized by combining the mathematical model,and developed a GUI sound field calculation software based on MATLAB platform,which is convenient for underwater noise prediction and underwater noise prediction and analysis of offshore engineering.The software is designed to be five main interfaces.The interface of monitoring of underwater noise data processing is mainly for underwater acoustic signal processing analysis and presented as data analysis required;the interface of ocean air noise prediction,mainly to predict the propagation of noise in the air above the water surface,the main source strengths are point source and line source;the interface of ship underwater noise prediction is mainly the noise level of different water layers produced by the ship during navigation in large scale;the interface of underwater noise prediction during project operation mainly predicts the level of underwater noise on different water layers;the interface of engineering construction piling underwater noise prediction is mainly predicts the propagation loss of underwater noise on the horizontal-vertical surface during construction.The design of the predictive software facilitates the processing of underwater data and the prediction of underwater noise under various construction conditions.In order to verify the accuracy of the prediction results of the design software,this paper conducts on-site monitoring of the underwater noise data,airborne noise data,and environmental parameters under construction conditions of each construction stage of Binhai Offshore Wind Farm.At the same time,the environmental parameters obtained by monitoring are used predicted the underwater noise in the engineering phase and the noise in the air.By comparing the forecast results with the real-time monitoring data,the software prediction results are basically in line with the site monitoring data.The software can well reflect the propagation characteristics of underwater noise generated during construction and the underwater noise propagation under a wide range of underwater noise.Compared with on-site monitoring,the software prediction scope is larger and more convenient.This paper compares and analyzes the field survey results of Binhai Wind Farm with the software forecast results designed,and the forecasting results are basically similar to the actual survey results.The forecasting results can reflect the true situation of underwater noise in a certain sea area as a whole,but the survey results and the prediction results are mainly caused by the deviation a phenomenon is the other environmental factors monitoring on-site.Forecasting the underwater radiation noise before the construction of marine engineering and provides a basis for the protection of marine organisms.