SHD Sim FEA
Rotordynamics
Campbell diagrams, gyroscopic effects
code_aster
In development.
This module is phase 2 — the next module after cfd. The solver behind it is chosen and its capability is known. SHD Sim is available today.
What it is
A rotating shaft is not a static structure: gyroscopic effects split its natural frequencies as speed rises, and the critical speeds where a whirl mode meets the running speed are what limit the machine. The Campbell diagram is the output that matters — frequencies against speed, with the crossings marked.
What this analysis needs from you
- Bearing stiffness and damping, which usually come from a bearing code rather than from geometry
- A rotational speed range to sweep
Typical uses
- Turbomachinery shaft and rotor design
- Critical speed maps for pumps and compressors
- Bearing stiffness selection
- Diagnosing a machine that vibrates only in a speed band
Industries
Sectors where this analysis is routinely asked for.
- Turbomachinery
- Pumps & compressors
- Electric machines
- Marine propulsion
What comes out
- Critical speed map
- Whirl orbits and mode shapes
- Unbalance response
- Separation margins at duty speed
Backend
code_aster
Chosen for this analysis type, with its capability verified against the module plan — not decided later.
Status
Phase 2 — the next module after CFD. Telling us you need this analysis moves it up the order — modules are sequenced by who is waiting for them.