Abstract
The pressure distribution of a misaligned elastomeric journal bearing is crucial for analyzing the uneven excessive wearing of the propulsion shaft bearing. However, analysis of the misaligned bearing is usually mainly based on the finite element method (FEM), which lacks a convenient and effective calculation method. This paper uses the influence coefficient factors (ICs) method to analyze the contact pressure of the misaligned bearing. First, the elastic displacement of the cylindrical shell subjected to a single point of concentrated force is derived and used to attain the new influence coefficient factors. Then, the geometric boundary conditions of planar conformal cylindrical contact are extended to the case of non-planar contact. Finally, the proposed method is applied and compared with other methods. The results show that the influence coefficient factors are greatly affected by the shape and constraints of the contact object. The proposed method is suitable for cylindrical shell contact analysis and has the same accuracy as FEM with half of the time consumption. In addition, the bearing capacity and contact stiffness are decreased as the effective contact area decreases due to misalignment.
Highlights
Journal bearing is an important part of a ship’s propulsion shafting
Comparison of Different Influence Coefficient Factors shaft stiffness, a multi-point bending was used to ensure its curvature by applying a disThe influence represent relationship the force and the placement load ofcoefficient
The displacement solution of the cylindrical shell is affected by the The parameters
Summary
Journal bearing is an important part of a ship’s propulsion shafting. Bearing failure will cause increased shaft vibration, reduced propulsion efficiency, and oil leakage. Some researchers have used the influence coefficient factors journal bearing are difficult to obtain. The change in bearing load caused by external factors leads to a change in the bearing contact area, which will make it impossible to determine the geometric boundary conpressure. This research studied the calculation method of the contact pressure of misaligned been seen. This research studied the calculation thethe contact of misaligned subjected to a single concentrated force is method derived,ofand radialpressure displacement distribuelastomeric journal bearing. Theshell geosubjected to a single concentrated is derived, andcylindrical the radial displacement distribution metric boundary condition of theforce planar conformal contact is extended to the isnon-planar taken as the influence coefficient of thepressure cylindrical. Be obtained boundary condition of the planar conformal cylindrical contact is extended to nonnew factors and a boundary condition into the ICs method. Some cases are studied and compared byApproaches different approaches to verify the effectiveness of the proposed method
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