forked from 1b-agent/fieldcraft-upstream
jyvikoandClaude Opus 5.5
67e05548b1
Main's oracle job failed at 8cba3a7: scordelis-lo-roof-solid u_z moved from
-0.3014029226397275 (blessed before #50) beyond its 1e-9 band. The case is a
thin shell (R/t = 100) of one layer of hex20R solids, ill-conditioned, so
rounding alone moves u_z by about 1e-9 relative: on macOS #50's multithreaded
supernodal factorisation moved it by 8.2e-10 (to -0.3014029223929), #52's
interpolation order by a further 1.3e-10 (to -0.3014029223541), and Linux
CI by slightly more, past the band. #52 kept the lattice geometry the same.
The result itself is unchanged at the 1e-9 level (0.33% from the
reference).
A quantity may now set `fixture_relative` (with a required
`fixture_reason`) for a wider fixture band; Scordelis-Lo uses 1e-7 and is
re-blessed. Moved-fixture messages print full precision.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm
Scordelis–Lo roof with one layer of hex20 reduced-integration solids
Our model of the published problem: a cylindrical roof of radius 25, length 50, thickness 0.25, spanning ±40°, E = 4.32 × 10⁸, ν = 0, self-weight 90 per unit area (a body force 90/t), supported by rigid diaphragms at its curved ends (u_y = u_z = 0 there) and free along its straight edges. One quarter with symmetry planes, 16 × 16 hex20 reduced-integration elements, one through the thickness (MacNeal and Harder list the roof as a solid-element test, Table 1).