feat(euler-beam-3d): add local beam kernel

2026-06-12 18:02:05 +09:00
parent 5b01642cbc
commit 95ca95180a
4 changed files with 265 additions and 1 deletions
@@ -0,0 +1,25 @@
+#pragma once
+
+#include <array>
+
+namespace fesa::elements {
+
+using Vector12 = std::array<double, 12>;
+using Matrix12 = std::array<double, 144>;
+
+struct EulerBeam3DSection {
+    double young_modulus;
+    double shear_modulus;
+    double area;
+    double torsion_constant;
+    double second_moment_y;
+    double second_moment_z;
+};
+
+Matrix12 euler_beam_3d_local_stiffness(double length, const EulerBeam3DSection& section);
+
+Vector12 euler_beam_3d_local_end_forces(double length,
+                                        const EulerBeam3DSection& section,
+                                        const Vector12& local_displacements);
+
+} // namespace fesa::elements