In order to obtain the energy contribution of all paths transmitting vibration from the underwater vehicle power plant to the outer shell, a new method named TPA (Transfer Path Analysis) power flow which combines classical TPA and power flow theory was proposed. Calculation results showed that isolators were the critical paths for transmitting vibration energy to the shell in low frequency band. In addition the main engine and sea water pump were critical vibration sources, which provided directions for reducing the vibration energy transmitted from vibration sources to the target body. To the best of our knowledge, this was the first time to assess the vibration transmission path of the underwater vehicle by TPA power flow method. This method can be employed in other works that need to evaluate the contribution of vibration energy.

为了获得水下航行器动力装置向外壳传递振动的所有路径的能量贡献，提出了一种结合经典TPA和功率流理论的新方法TPA（Transfer Path Analysis）功率流。计算结果表明，隔振器是低频段振动能量向壳体传递的关键路径。此外，主机和海水泵是关键的振动源，为减少从振动源传递到目标体的振动能量提供了方向。据我们所知，这是第一次用TPA能流法评估水下航行器的振动传递路径。该方法可用于其他需要评估振动能量贡献的工作。