Noise & Vibration Prediction Analysis

After receiving the detailed drawings and information for the target ship – Considering SBN(Structure-Borne Noise) & ABN(Air-Borne Noise) – Confirmation of noise control results conducted in the initial design review – Noise control by using numerical analysis result – Suggestion of additional or alternative noise control method if necessary

The procedure is illustrated in the case of a 49500 dwt Chemicals and Oil Products Carrier. Vibration calculation includes estimation of propeller excitation forces and ship response due to both propeller and engine excitation. Ship hull vibrations are analysed by 1D FEM model, while ship structure vibrations by a combined 3D and 1D FEM model of the aftbody and remaining hull part, respectively.