VIBRATION ANALYSIS OF A SUBMARINE PROPELLER-SHAFT-HULL SYSTEM USING FRF BASED SUBSTRUCTURING METHOD

摘要

A dynamic model to study the vibration characteristics of a submarine propeller-shaft-hull system is developed using the FRF-based substructuring method (FBSM). The propeller-shaft system and the hull is firstly modelled separately, while the elastic propeller is modelled by using harmonic disc and blade of array element, and the hull is modelled using finite element method. After that, the two substructures are synthesized using FBSM. The modes and nature frequencies of the propeller-shaft subsystem, the hull and the total system are analysed. The coupled vibration characteristics of the propeller-shaft subsystem, the hull and the total system are simulated.