Dynamic Design of a 100MW Steam Turbine Shaft

This project focused on the dynamic design and analysis of a 100MW steam turbine shaft using finite element methods (FEM) and MATLAB simulations. The analysis covered key aspects such as shaft deformation, bearing loads, critical speeds, and system stability under various rotational speeds.

Key Features:
- Elastic Line of the Shaft: The project calculated the sag line (elastic deformation) of the shaft under its own weight, providing insights into the loads exerted on the bearings.
- Campbell Diagram and Stability Map: A comprehensive Campbell diagram and stability map were generated for rotational speeds ranging from 0 to 6500 RPM, indicating the stability factors for the first four natural frequencies and identifying the maximum stability factor.
- Unbalance Response Analysis: The unbalance response of the shaft was calculated for both single and coupled unbalance cases. Critical speeds and the corresponding responses at the bearings were evaluated, allowing for better insight into the shaft’s performance.
- Shaft Orbits: The orbits of the shaft at operating speed (5800 RPM) were analyzed, with special attention given to backward whirl phenomena, demonstrating the shaft’s behavior under unbalance conditions.