운행중 전달경로해석법을 이용한 선박의 수중방사소음 예측

It is necessary to predict underwater radiated noise with sensors attached to the ship because measuring noise radiated from ships has limitations such as the requirement for additional measurement systems, the requirement for low background noise, and the need for the absence of ships operating nearby. To estimate underwater radiated noise and determine the contribution of noise sources, operational transfer path analysis is used. Accelerometers are mounted on a variety of machinery and submerged plates to evaluate the transmission path while considering noise sources. To measure the underwater radiation noise, a buoy system is deployed in the water. Under various speed conditions, with or without cavitation, the acceleration and underwater radiated noise are measured simultaneously. The independent principle components describing the transfer function are determined using the singular value decomposition algorithm. The underwater radiated noise predicted using the measured acceleration level and transfer function is compared to the measured noise. For each speed case, the contribution of noise sources is investigated.