In a significant stride towards enhancing underwater vehicle performance, researchers have developed a novel approach to actively control vibration and noise in the stern system of submarines and other underwater vehicles. The study, led by Yaqi Tian from the School of Transportation and Logistics Engineering at Wuhan University of Technology, along with the State Key Laboratory of Maritime Technology and Safety and the National Engineering Research Center for Water Transport Safety, has been published in the journal ‘Applied Ocean Research’ (which translates to ‘Applied Ocean Research’ in English).
The research focuses on mitigating low-frequency vibration and acoustic radiation caused by propeller bearing forces and surface force excitations. Tian and his team established an analytical dynamic model of the shaft-shell system using Flügge theory and Euler–Bernoulli theory. This model was then verified through finite element and boundary element methods, ensuring its accuracy and reliability.
One of the key findings of the study is the impact of actuator placement, error signal selection, and control strategies on the effectiveness of active control. The researchers proposed a combined active control scheme that involves installing electromagnetic actuators on both the shaft and the shell. This innovative approach effectively controls shaft vibration, shell vibration, and far-field acoustic radiation simultaneously.
“The theoretical model established in this paper can be used as a reference for low-frequency vibration control of an underwater vehicle,” said Tian. This breakthrough has significant implications for the maritime industry, particularly in the design and operation of submarines and other underwater vehicles.
The commercial impacts of this research are substantial. By reducing vibration and noise, underwater vehicles can achieve better stealth capabilities, which is crucial for military applications. Additionally, the enhanced performance can lead to increased efficiency and reduced maintenance costs, benefiting both military and commercial sectors.
The opportunities for maritime sectors are vast. Shipbuilders can incorporate these findings into their designs to create quieter and more efficient vessels. Maritime engineers can use this research to develop advanced control systems that improve the performance of existing underwater vehicles. Furthermore, the technology can be applied to other areas, such as offshore wind turbines and marine propulsion systems, broadening its commercial potential.
In summary, Yaqi Tian’s research represents a significant advancement in the field of underwater vehicle technology. By addressing the challenges of vibration and noise control, this study opens up new possibilities for the maritime industry, paving the way for more efficient, stealthy, and cost-effective underwater vehicles.