Real-Time Calculation of Noise Radiated by Ship Structure via Machinery Exciting Force Estimation
A method which combines the estimation of machinery exciting force and mechano-acoustical transfer function is proposed in this paper to predict real-time radiated noise by ship structure. The measurement methods of mechano-acoustical and mechano-vibrational transfer functions which are used in radiated noise calculation are described. The feasibility and accuracy are verified by an underwater model experiment. Measurement and calculation results are consistent. The average error of the exciting force estimation is about 2dB, and the average error of radiated noise pressure calculation is about 3dB. The accuracy of the radiated noise calculation is directly affected by exciting forces estimation errors, which can be corrected by a correction factor to increase the accuracy of radiated noise calculation effectively.
Chunliang Zhang and Paul P. Lin
D. D. Lu and L. He, "Real-Time Calculation of Noise Radiated by Ship Structure via Machinery Exciting Force Estimation", Applied Mechanics and Materials, Vols. 226-228, pp. 87-91, 2012