船舶水下辐射噪声计算评估方法应用

Application on Calculation and Evaluation Methods of Ship Underwater Radiated Noise

船体受到动力设备激励时会产生相应的振动,而振动不仅会对居住舱室造成影响,还会引起周围的流体振动,导致水下产生辐射噪声。本文就通过有限元与边界元结合法,借助Patran/Nastran和Virtual.lab有限元的软件对船舶水下的辐射噪声实施联合仿真和计算,在实船测试与船模试验的计算后获取激励源条件下船舶水下的辐射噪声实际情况,进而对初步设计中水下辐射噪声评估法实施修正,提升船舶的声学设计与评估精确度。

When the hull is excited by the power equipment,it will generate corresponding vibration,and the vibration will not only affect the living room,but also cause the surrounding fluid to vibrate,resulting in radiated noise underwater.In this paper,through the combination of finite element and boundary element method,with the help of Patran/Nastran and Virtual.lab finite element software,the joint simulation and calculation of the underwater radiated noise of the ship were carried out,the actual situation of the underwater radiation noise of the ship under the excitation source condition was obtained after the actual ship test and the ship model test calculation,and then the underwater radiation noise evaluation method in the preliminary design was revised to improve the accuracy of the ship's acoustic design and evaluation.