TOPOLOGY OPTIMIZATION OF SHIP THRUSTER PROPELLER

In the paper the possibilities of topology optimization for searching for lightweight structure versions designed for hydrodynamic criteria ship thruster propeller is demonstrated. A possible reduction in the mass of the propeller while maintaining its geometric model allows to increase the efficiency of the entire thruster. Finite-element models for topological optimization of the cavities of the blade and the hub of the propeller are developed. For optimization procedures, the SIMP method to parameterize the properties of an isotropic material is used. Optimization calculations separately for the propeller blade and for its hub are performed. Due to the cyclical nature of the geometry and external load, optimization for only one blade under the assumption that it was rigidly fixed on the hub is carried out. Reinforcement structures grown in internal cavities as a result of topological optimization resemble natural and biological objects that are the result of natural evolutionary optimization. The reinforcement concept for the direct manufacture of propellers using direct laser growing technology is adapted. The result is a reduction in propeller mass by 26%. A strength test is performed, which showed that a propeller with an optimized structure has reliability characteristics similar to the traditional version.