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PVAST Propeller Vibration and Strength Analysis Program Version 7.3 Examples Manual

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Technical Report

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MARTEC Limited Halifax, Nova Scotia Canada

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This report is an examples manual for the finite element analysis code called PVAST Propeller Vibration And STrength that is used for prediction of stress and vibration in marine propellers. PVAST can automatically generate propeller finite element models from basic propeller geometry defined by the orientation of 20 wrapped blade sections at specified radii. A number of different models can be considered including a single blade, a single blade with fillet, a blade-fillet-palm model, a blade-fillet-hub segment model, and multiple blade and hub model. The types of structural finite element analyses that can be conducted include static analysis with user-defined blade pressure distributions and point loads, natural frequency analysis in air and in water, time domain analysis with applied loads and support motion, response spectrum analysis and frequency response analysis. The program provides 20 and 3D plotting of blade geometry, finite element models and post-processing to provide visualization of predicted finite element model displacements, stresses and mode shapes. The code has been modified recently to include a Windows graphical user interface implemented with a combination of GKS and MS Visual C. This provides a more friendly user interface and is a major change in the look and feel of PVAST Version 7.3 compared with earlier versions of the code. This manual provides a number of example problems, considered with PVAST Version 7.3 for a range of model types, analysis options and results.

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