SHD Sim FEA
Modal / eigenfrequency
Natural frequencies and mode shapes
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
Natural frequencies and the shapes that go with them, with no load applied at all — it is a property of the structure, not of what you do to it. Cheap, fast, and very often the first question worth asking, because a resonance found on screen is far less expensive than one found on a test rig.
What this analysis needs from you
- Density as well as stiffness — mass matters here in a way it does not for static
- A restraint set that matches how it is actually mounted
- A frequency range or a mode count worth extracting
Typical uses
- Checking a structure against a known excitation frequency
- Rotating equipment: staying off a running speed
- Deciding where to stiffen, from the mode shape
- A sanity check on a model, since a wrong stiffness or mass shows up immediately
Industries
Sectors where this analysis is routinely asked for.
- Rotating machinery
- Automotive NVH
- Aerospace
- Electronics packaging
What comes out
- Natural frequencies
- Mode shapes
- Mass participation per mode
- Frequency margins to excitation
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.