Ensuring that a piece of rotating machinery will run smooth and stable is a key to ensuring long life and high reliability (unless you are trying to build a paint shaker). Xdot's rotordynamic analysis services can help you ensure that your machines will run smoothly. We have analyzed machines and machinery trains ranging from a 1200 MW nuclear steam turbine train with a rotating assembly weight of over 1.25 million pounds, down to rotors weighing less than a pound.
We use a combination of in-house analysis tools, along with Dyrobes to quickly and accurately perform all of the "standard" analyses, along with some things that are somewhat unique.
Our capabilities include:
Lateral Analysis
- Undamped critical speeds and mode shapes
- Damped critical speeds and mode shapes
- Stability analysis
- Forced response due to unbalance, shaft bow, side forces, etc.
- Transient/nonlinear analysis for squeeze film dampers, blade loss, rotor drop, large amplitude responses
- Active magnetic bearings
Torsional Analysis
- Undamped critical speeds and mode shapes
- Campbell diagrams
- Steady-state response and fatigue life
- Start-up transient analysis
- Electrical fault transient analysis
Bearing Analysis and Optimization
- Hydrodynamic (oil, water, etc.) fixed geometry bearings
- Tilting pad bearings
- Rolling element (ball) bearings
- Active Magnetic Bearings
- Foil Bearings
Unusual, complex and/or difficult analyses that others may not have the tools to do
- Two input planetary gearbox torsional dynamics
- Large parametric studies
- Coupled torsional lateral analysis