Example Problem Dimensional Flexibility for Vehicle Architecture atisfying performance requirements try, aero, fuel economy. packaging, business Body style Powertrain and components Nine high level, architectural design variables Vehicle width at rocker Front and rear track width+P Front and rear overhang Front and rear axe location- vertical and horizontal *N* Perturbed representation Computed change in Net Income(natural objective Generated sensitivities and optimized GM RD Example-Dimensional Flexibility Data Flow and Analysis esults (NASTRAN) (Excel) Aerodynamics Ene (SIGHT) Business18 4/14/04 Fenyes Example Problem - Dimensional Flexibility for Vehicle Architecture • Maximize net income while satisfying performance requirements – Discipline analyses: geometry, aero, fuel economy. packaging, business – Discipline sub-optimization: structures, business • Specific vehicle configuration: – Body style – Powertrain and components • Nine high level, architectural design variables – Vehicle width at rocker – Front and rear track width – Front and rear overhang – Front and rear axle location – vertical and horizontal • Performed automated discipline analyses: – Perturbed representation – Generated analysis models – Exchanged data through database – Computed change in Net Income (“natural” objective) • Generated sensitivities and optimized Design Representation (Unigraphics) Database (MS Access) Multidisciplinary Design (iSIGHT) Structural Optimization (NASTRAN) Aerodynamics Interior Roominess (Excel) Business Summary of Results (Excel) Energy Custom Custom Custom 4/14/04 Fenyes Shoulder Room Design Representation (Unigraphics) Database (MS Access) Multidisciplinary Design (iSIGHT) Structural Optimization (NASTRAN) Aerodynamics Interior Roominess (Excel) Business Summary of Results (Excel) Vehicle Geometry Body Structure Mass Frontal Area, Cd Value of Roominess Optimized Gauges And Sections Architecture Configuration & Parameterization Net Income Exterior Width Gauges, Areas, Section Sizes Fuel Economy, Performance Energy Overall Width Example – Dimensional Flexibility Data Flow and Analysis Vehicle Width at Rocker