Numerical Analysis of Blade Stress of Marine Propellers
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RESEARCH ARTICLE
Numerical Analysis of Blade Stress of Marine Propellers Kai Yu 1 & Peikai Yan 1 & Jian Hu 1 Received: 8 September 2019 / Accepted: 10 May 2020 # The Author(s) 2020
Abstract In this study, a series of numerical calculations are carried out in ANSYS Workbench based on the unidirectional fluid–solid coupling theory. Using the DTMB 4119 propeller as the research object, a numerical simulation is set up to analyze the open water performance of the propeller, and the equivalent stress distribution of the propeller acting in the flow field and the axial strain of the blade are analyzed. The results show that FLUENT calculations can provide accurate and reliable calculations of the hydrodynamic load for the propeller structure. The maximum equivalent stress was observed in the blade near the hub, and the tip position of the blade had the largest stress. With the increase in speed, the stress and deformation showed a decreasing trend. Keywords Marine propeller . Stress distribution . Deformation distribution . Open water performance . Fluid . solid coupling
1 Introduction With the development of large-scale civil ships, the unevenness of the wake flow field at the surface of the ship’s propeller has increased, causing deterioration in the working environment of the propeller. An increase in the power of the host increases the load per unit area of the propeller. These effects require a high strength of the propeller. To improve the propeller strength, the minimum thickness of the propeller blade and the stress distribution of the blade must be considered (Zhao 2003). Many scholars have conducted research on the hydrodynamic performance of propellers and developed many research methods, such as the lifting-line method (Lerbs 1952), lifting-surface method Article Highlights • An increase in the power of the host increases the load per unit area of the propeller, which requires a high strength of the propeller. • A numerical simulation is set up to analyze the open water performance of a propeller. • The stress distribution and blade deformation of the propellers made of different materials at different forward speeds have been obtained using the FSI technique. • The stress and deformation distribution under different working conditions and their relationship with material have been analyzed. * Jian Hu [email protected] 1
College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China
(Sparenberg 1960; Tsakonas et al. 1966; Cummings 1973; Kerwin and Lee 1978; Greeley and Kerwin 1982; Lee 1980), and panel method (Kerwin 1987; Lee 1987; Yamasaki and Ikehata 1992; Koyama 1994; Hoshino 1990). Several scholars have also examined the strength of propellers using fluid–structure interaction (FSI) methods. Lin and Lin (1996) used the lift-surface method and nine-node degenerated shell finite element coupling algorithm to understand the hydrodynamic performance of propellers made of composite materials. Young (2007) studied the panel method and method coupled ABAQUS with the propeller h
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