基于传递路径分析法的船舶舱室噪声预报研究

Prediction of Ship Cabin Noise Based on the Transfer Path Analysis Approach

基于传递路径分析法结合房间声学常数对船舶舱室噪声进行预报,噪声传递路径传递损耗按照空气噪声和结构噪声分别计算,结合房间常数计算接收点舱室噪声声压级。以传递路径分析法为基础,提出舱室噪声预报的通用计算流程,结合数值计算(SEA)方法确定及优化传递路径分析法中的重要计算参数(传递损耗及传递函数),并通过某内河汽车运输船舱室噪声预报实例,发现基于此方法的计算预报值与实测值吻合良好,验证了其计算参数的可靠性,从而提高了该方法的计算精度。

The ship cabin noise is predicted based on the Transfer Path Analysis(TPA)approach combined with the room acoustic constant.The transmission loss of noise is calculated by combining the airborne noise and structure-borne noise,and the noise pressure level of the receiving space is calculated according to the room constant.The general calculation procedure of the ship cabin noise prediction based on the TPA approach is put forward.The important calculation parameters of transfer path analysis(transmission loss and transfer function)are determined and optimized in combination with numerical calculation SEA method.It is found that the calculated ship cabin noise prediction value of the inland vessel car carrier by TPA approach is in good agreement with the measured value,which verifies the reliability of the calculation parameters.So,the computation accuracy of the TPA approach is improved.