Archive for 'Engineering'

Multi-Objective Optimization of an Air Flow Diverter

iChrome’s software solution Nexus has been instrumental to Vortice ® (1), a leading brand in the production and marketing of air treatment products, to speed-up preliminary product design and to achieve better performances. An overall improvement of 15% on the air flow has been achieved compared to the starting design.

Methodology:

This application shows the main advantages of CAD/CAE software integration methodologies to optimize the complex shape of a diverter. These methodologies have been used in ...

Continue Reading →

High-fidelity Optimization of a Transport Aircraft Wing

The objective of this work is to perform the aero-structural design optimization of a transonic business-jet wing. For this purpose, Euler 3D CFD with refined mesh and a beam-based finite element model for the wing structure have been used: the first to predict aerodynamic performance of the wing, the latter to predict overall wing stiffness (bending and torsional).

Methodology

The available literature about MDO applied to aircraft design uses the Breguet range equation as objective function. This means that the variation of ...

Continue Reading →

Optimization of Tractor Front Axle Support

iChrome’s software solutions, Nexus and Shaper, have been instrumental to Same Deutz-Fahr, a leading tractor manufacturer, to achieve weight reductions and an overall performance increase of complex 3D assemblies such as Front Axle Supports. The main objective of this work was to improve the initial shape of a tractor front axle support with the goal to minimize the overall weight under performance requirement constraints. An overall weight saving of 15% compared to the previously adopted design, has been ...

Continue Reading →

Size and Shape optimization of Composite Stiffened Panels via MLS free-mesh morphing

This work combines Moving Least Square mesh morphing methods with classical optimization techniques to optimize Composite Stiffened Structures against buckling constraints. The idea is to use standard optimization methods to handle thicknesses and percentages of the composite laminates and Moving Least Square morphing capabilities to modify the shape of the stringers without generating new meshes from geometry during the optimization process.

Methodology

The considered structural assembly is reported in the figure below. A flat panel with ...

Continue Reading →

Optimization of an ORC Radial Turbine Nozzle

Organic Rankine Cycle (ORC) turbogenerators usually operate in thermodynamic regions characterized by high pressure ratios and strong real-gas effects in the flow expansion, requiring therefore a non-standard turbomachinery design. An effective approach can be based on the intensive use of Computational Fluid Dynamics (CFD) and optimization procedures to investigate a wide range of possible configurations.

Methodology

Expansions through impulse stages of ORC turbines are commonly characterized by large pressure ratios and a low speed of sound ...

Continue Reading →

Optimization of Transonic Wing with Advanced 3D Mesh Morphing

Aerodynamic efficiency is a key aspect in commercial aircraft design as it allows reducing fuel consumption and meeting emission and performance requirements. The main goal of this work is to improve the initial shape of the wing of an innovative three lifting surfaces configuration aircraft in order to minimize drag at transonic cruise condition.

Methodology:

The classic approach to aerodynamic shape optimization requires the definition of a geometrical parameterization of the CAD model. In this case, ...

Continue Reading →

Optimization of a Motorbike Composite Swing-Arm

The challenge is to perform a feasibility study aiming at replacing the single-sided swing-arm for high performance MV Agusta F4 1000R and “Brutale” 990R/1090RR motorcycles made in aluminum alloy with a Resin Transfer Molding (RTM) carbon composite one. Injection-based technologies for long fiber reinforcement, such as RTM, have been found particularly rewarding for motorsport cars and motorbikes.

Methodology:

After an initial re-assessment of shape and design of the part to make it more suitable to be ...

Continue Reading →