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Huang Q.,Wuhan University of Technology | Zhang C.,Wuhan University of Technology | Jin Y.,Key Laboratory of Marine Power Engineering and Technology Ministry of Transportation | Yuan C.,Wuhan University of Technology | And 3 more authors.
Journal of Vibroengineering | Year: 2015

Marine propulsion shafting connects the main engine and propeller, and plays an important role in promoting the movement of ships. Along with the operation of shafting system, various vibration forms couple with each other and cause different kinds of coupled vibrations, which seriously threaten the safety and reliability of ships. In this paper, a finite element model of marine propulsion shafting is established with coupled constraint on the elements of propeller, and the coupled torsional and transverse vibration under idling and loading conditions are studied at different rotational speeds. According to comparison of numerical simulation results and experimental tests, the coupled finite element method can reveal the basic principles of coupled dynamics of marine propulsion shafting and provide good technical support for predicting the coupled vibration, thus improving the safety and reliability of sailing performance of the ships. © 2015 JVE International Ltd.

Yan X.-P.,Wuhan University of Technology | Yan X.-P.,Key Laboratory of Marine Power Engineering and Technology Ministry of Transportation | Li Z.-X.,Wuhan University of Technology | Li Z.-X.,Key Laboratory of Marine Power Engineering and Technology Ministry of Transportation | And 6 more authors.
Chuan Bo Li Xue/Journal of Ship Mechanics | Year: 2013

This paper reviews theory and methodology that were developed to cope with the matching optimization of the ship propulsion system and hull. The recent advancement on the strip theory for the forecasting of hull deflection under various wave loads, and the impact of the hull deformation on the propulsion shaft line are discussed. The advantages and shortcomings of traditional shafting alignment techniques are reviewed and illustrated through examples. Applications and the state of-the-art in advanced shafting dynamic alignment are also reviewed. Finally, several main areas for future development in this field are discussed. These include development of the precise modeling theory of the large ship propulsion system under uncertainty, the coupled dynamic modeling method for the large ship propulsion system and hull deflection, and the optimization database for the coupling design of the propulsion system and ship type.

Tan W.,Wuhan University of Technology | Tan W.,National Water Research Institute | Tan W.,Key Laboratory of Marine Power Engineering and Technology Ministry of Transportation | Yan X.,Wuhan University of Technology | And 12 more authors.
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2015

Shaftless rim-driven propulsion system is a new type of ship propulsion system developed in recent years, which is a successful attempt of innovative mode of thinking on ship propulsion system. The shaftless propulsion system can effectively reduce the cabin space occupied by propulsion system and increase ship propulsive efficiency significantly. It can also meet the concealment requirement of warship by reducing vibration and noise. Therefore, it has widely application prospect and great application value in both military and civilian areas. This paper introduces the fundamental and structure of shaftless propulsion system. The characteristics and application prospect of shaftless propulsion system are also summarized based on the technology development and key technologies. ©, 2015, Wuhan University of Technology. All right reserved.

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