Shape optimization of an engine connecting rod

Design Requirements
  • Minimize weight
  • Satisfy strength requirement
  • Satisfy durability requirement
Design Problem Formulation
  • Design variables  (5)
    Total Thickness
    Rib Height
    Rib Width
    Crank Width
    Piston Width
  • Objective (1)
    Minimize mass
  • Constraints (2)
    Strength requirement
    Durability requirement
Simulation and Design Software
  • Simulation : DAFUL
  • Design : PIAnO
Design Optimization Process
  1. Establish automation and perform DOE
  2. Generate metamodel using DOE samples
  3. Perform approximate optimization
Optimization Result
  • Mass reduced by 17% while satisfying all constraints