Research on Application of Scale Loading Technology in Large Hub Body Model

With the rapid development of science and technology, the demand for research on loading performance and structural strength of large and complex systems is increasing. The propeller hub body is the core component of the ship’s controllable pitch propeller device. In order to study the fatigue life and stress of large and compact hubs, considering the constraints of cost and test conditions, the propeller hub body in the high-power hub assembly is taken as an example to introduce the scaled loading technology simulation test and carry out relevant research. In the early stage of the test, by summarizing the practical application of scaled loading technology in various fields and the scaled ratio and parameter relationship values used in the design of scaled models, the scaled values and parameter values required for the propeller hub body design are analyzed. By using finite element simulation, the maximum stress distribution of the bearing stress area in the scaled hub body prototype and the positive prototype under different working conditions is compared. The results of the stress distribution cloud map of the key area of the propeller hub body show that within a certain range, the propeller hub body scaled prototype has a high accuracy in simulating the structure and material behavior. This study proves the feasibility and scientific validity of the application research of scaled loading technology in large hub assemblies.