Project Background

A high-speed EMU car body lightweight project aimed to minimize car body weight while maintaining structural strength and stiffness to improve operational efficiency.

Technical Solution

  • Hypermesh Preprocessing: High-quality finite element mesh generation
  • Sizing Optimization: Plate thickness optimization
  • Shape Optimization: Cross-section shape optimization
  • SVM Surrogate Model: Proxy model acceleration for optimization

Analysis Content

  1. Static Strength: Car body stress distribution under various load cases
  2. Modal Analysis: Car body natural frequencies and mode shapes
  3. Fatigue Analysis: Key component fatigue life evaluation
  4. Multi-objective Optimization: Weight, strength, stiffness balance

Project Results

  • 15% weight reduction in car body
  • Meets strength and stiffness requirements
  • 40% reduction in optimization cycle