エンジンとZ ペラ推進器が船舶の騒音に及ぼす影響及びその低減手法の評価に関する研究

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  • Evaluation and Reduction Approach of Ship Noise from Engine and Z-peller
  • シンポジウム エンジンとZペラ推進器が船舶の騒音に及ぼす影響及びその低減手法の評価に関する研究
  • シンポジウム エンジン ト Zペラ スイシンキ ガ センパク ノ ソウオン ニ オヨボス エイキョウ オヨビ ソノ テイゲン シュホウ ノ ヒョウカ ニ カンスル ケンキュウ

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Recently, the reduction of ship noise and underwater radiated noise has become animportant issue. Engines and Z-pellers (azimuth thrusters) are considered as major sources of noise, and a quantitative evaluation of each sound source is required. In this paper, the contributions of engine and Z-peller were evaluated by noise and vibration measurement results in a hybrid tug ship. In order to predict the structure-borne noise level from the engine, an excitation force measurement was performed for both rigid and rubber-mounted engines. Underwater radiated noise emitted from the Z-peller was evaluated from cavitation noise tests using a water tank. In these tests, two types of Zpeller configurations were proposed, and the noise reduction effect was confirmed. Theresults are presented in this paper.

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