A new source separation method was presented based on velocity transfer function ( VTF) , and its interconnection to the method based on frequency response function (FRF) was deduced theoretically. It was found that the VTF-based method is the simplified representation of the FRF-based method without considering coupling among noise sources. The separation efficiency could increase dramatically with the VTF-based method because the velocity of noise sources could be measured directly without requiring any impedence or mobility parameters. Since resilient isolators were extensively used in modern submarines, the coupling effect among structural noise sources was greatly weakened, that provided a precondition for widely applying the proposed method. Finally, the validity of the proposed method was examined using a test to separate noise sources among supports of a pipeline.%提出一种基于速度传函的噪声源分离方法,并从理论上推导了该方法与TPA法之间的内在联系,发现基于速度传函的噪声源分离方法是TPA法在不考虑源耦合下的简化形式.由于噪声源处的振动速度可直接测量且无需预先测量任何阻抗或导纳参数,显著提高了基于速度传函的噪声源分离方法的分离效率.而现代舰船中隔振器的大量应用,大大削弱了不同源之间的耦合影响,为该方法的广泛工程应用提供了先决条件.最后通过管路马脚间噪声源分离实验证明了该方法的正确性.
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