反向多级传递路径分析方法研究

Research on Reverse Multi-Stage Transfer Path Analysis Method

摘要:

为解决舰船复杂结构中噪声与振动传递路径识别精度不足及计算不稳定问题，提出一种基于反向激励的多级传递路径分析方法。该方法利用工况传递路径分析建立输入输出关系，引入奇异值分解的截断总体最小二乘算法修正病态矩阵，提高识别稳定性与精度。通过多级分解实现对各子系统能量传递的分层识别，构建复杂结构的噪声传递模型。消声水池实验表明，该方法能准确重构正、反向传递特性，验证路径互易性，并在减振器失效工况下有效识别异常能量传递，实现故障定位。结果表明，该方法可显著提升噪声传递路径识别的可靠性，为舰船减振降噪与状态监测提供技术支撑。

Abstract:

To improve the accuracy and stability of noise and vibration transfer path identification in complex ship structures，a reverse multi-stage transfer path analysis method is proposed. The method establishes the input-output relationship using operational transfer path analysis and introduces a truncated total least squares algorithm based on singular value decomposition to correct ill-conditioned matrices and enhance computational robustness. By applying hierarchical decomposition ， the method identifies energy contributions between subsystems and constructs a multi-level noise transfer model. Experimental verification in an anechoic water tank shows that the proposed approach accurately reconstructs forward and reverse transfer characteristics，validates reciprocity of transfer paths，and effectively identifies abnormal energy transmission and faults under isolator failure conditions. The results demonstrate that this method significantly improves the reliability and precision of transfer path identification and provides strong technical support for ship vibration reduction and condition monitoring.