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Ocean Systems Engineering
  Volume 6, Number 2, June 2016 , pages 191-201
DOI: https://doi.org/10.12989/ose.2016.6.2.191
 

Uncertainty reaction force model of ship stern bearing based on random theory and improved transition matrix method
Sheng dong Zhang and Zheng lin Liu

 
Abstract
    Stern bearing is a key component of marine propulsion plant. Its environment is diverse, working condition changeable, and condition severe, so that stern bearing load is of strong time variability, which directly affects the safety and reliability of the system and the normal navigation of ships. In this paper, three affecting factors of the stern bearing load such as hull deformation, propeller hydrodynamic vertical force and bearing wear are calculated and characterized by random theory. The uncertainty mathematical model of stern bearing load is established to research the relationships between factors and uncertainty load of stern bearing. The validity of calculation mathematical model and results is verified by examples and experiment yet. Therefore, the research on the uncertainty load of stern bearing has important theoretical significance and engineering practical value.
 
Key Words
    stern bearing; uncertainty model; random theory; stochastic theory; improved transition matrix method
 
Address
Sheng dong Zhang: School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, P.R. China
Zheng lin Liu: School of Energy and Power Engineering Wuhan University of Technology, Wuhan, Hubei Province, 430063, P.R. China
 

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