Agent skill

fe-analyst-13-common-fea-mistakes-and-remedies

Sub-skill of fe-analyst: 13. Common FEA Mistakes and Remedies.

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npx add-skill https://github.com/vamseeachanta/workspace-hub/tree/main/.claude/skills/_archive/engineering/marine-offshore/fe-analyst/13-common-fea-mistakes-and-remedies

SKILL.md

13. Common FEA Mistakes and Remedies

13. Common FEA Mistakes and Remedies

Mistake Symptom Remedy
Too-coarse mesh at TDP Curvature under-predicted Refine to ≤ 0.5×OD near TDP
Adjacent segment ratio > 3 Spurious oscillations Grade mesh gradually
Missing ramp in dynamics Non-physical transients in results Add 1–2×Tp ramp; exclude from stats
Seabed stiffness too high Divergence / oscillation at TDP Use kn = 50–200 kN/m/m typically
Missing Cm (added mass) Under-estimated natural period Ca = 1.0 for circular sections
Static only (no dynamics) Misses resonance effects Always run dynamic for wave analysis
Compression not checked Upheaval buckling risk missed Check min(Te) > 0 at all nodes
No content weight Unconservative sag bend tension Include internal fluid density
Wrong sign convention for z Results appear inverted Confirm OrcaFlex z-positive-up convention

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