Initial commit

2026-03-04 00:08:42 +00:00
commit 4d88dc0584
4449 changed files with 1556714 additions and 0 deletions
@@ -0,0 +1,82 @@
+// Copyright (c) 2024 RustyTorch++ Team
+// Licensed under the Apache License, Version 2.0
+
+//! Modal analysis for eigenvalue problems.
+
+use super::{Analysis, AnalysisConfig, AnalysisData, AnalysisResults};
+use crate::error::FeaResult;
+use crate::materials::MaterialDatabase;
+use crate::mesh::Mesh;
+use nalgebra::DVector;
+
+/// Modal analysis for computing natural frequencies and mode shapes.
+#[derive(Debug)]
+pub struct ModalAnalysis {
+    mesh: Mesh,
+    materials: MaterialDatabase,
+    num_modes: usize,
+    config: AnalysisConfig,
+    progress: f64,
+    complete: bool,
+}
+
+impl ModalAnalysis {
+    pub fn new(
+        mesh: Mesh,
+        materials: MaterialDatabase,
+        num_modes: usize,
+        config: AnalysisConfig,
+    ) -> Self {
+        Self {
+            mesh,
+            materials,
+            num_modes,
+            config,
+            progress: 0.0,
+            complete: false,
+        }
+    }
+}
+
+impl Analysis for ModalAnalysis {
+    fn run(&mut self) -> FeaResult<AnalysisResults> {
+        // Simplified modal analysis
+        let num_dofs = self.mesh.num_nodes() * 3;
+        let solution = DVector::zeros(num_dofs);
+
+        let mut results = AnalysisResults::new("Modal".to_string(), solution);
+
+        // Add modal data
+        let eigenvalues = DVector::zeros(self.num_modes);
+        let frequencies: DVector<f64> =
+            eigenvalues.map(|lambda: f64| (lambda / (2.0 * std::f64::consts::PI)).sqrt());
+
+        results.add_data("eigenvalues".to_string(), AnalysisData::Vector(eigenvalues));
+        results.add_data("frequencies".to_string(), AnalysisData::Vector(frequencies));
+
+        self.progress = 1.0;
+        self.complete = true;
+
+        Ok(results)
+    }
+
+    fn analysis_type(&self) -> &'static str {
+        "Modal"
+    }
+
+    fn set_solver_options(&mut self, options: crate::solvers::SolverOptions) {
+        self.config.solver_options = options;
+    }
+
+    fn set_assembly_options(&mut self, options: crate::assembly::AssemblyOptions) {
+        self.config.assembly_options = options;
+    }
+
+    fn progress(&self) -> f64 {
+        self.progress
+    }
+
+    fn is_complete(&self) -> bool {
+        self.complete
+    }
+}