feat(fem-and-beam-kernel): step 3 — timoshenko-stiffness-kernel

2026-07-31 02:24:48 +09:00
parent 07f0bb3c13
commit 93b2c3d43e
6 changed files with 926 additions and 0 deletions
@@ -0,0 +1,35 @@
+#pragma once
+
+#include <array>
+#include <optional>
+#include <vector>
+
+#include <fesa/core/diagnostic.hpp>
+#include <fesa/core/vec3.hpp>
+#include <fesa/fem/beam_frame.hpp>
+#include <fesa/model/beam_section.hpp>
+#include <fesa/model/material.hpp>
+
+namespace fesa {
+
+struct Beam3D2Input final {
+    std::array<Vec3, 2> coordinates;
+    IsotropicElastic material;
+    BeamSection section;
+};
+
+struct Beam3D2Contribution final {
+    Matrix12 local_stiffness;
+    Matrix12 global_stiffness;
+    BeamFrame frame;
+};
+
+struct BeamKernelResult final {
+    std::optional<Beam3D2Contribution> contribution;
+    std::vector<Diagnostic> diagnostics;
+};
+
+[[nodiscard]] BeamKernelResult compute_beam3d2(
+    const Beam3D2Input& input);
+
+}  // namespace fesa