The commercial vehicle industry is facing main challenges in terms of performance improvements and at the same time meeting the legislation requirements towards emissions (CO2, GHG, participates) reduction. Decreasing the weight of the vehicle has therefore gained importance, because all investigations show a direct link between vehicle weight and fuel consumption/emissions. On the other hand, lightweight solutions need to satisfy the performance standard, such as stiffness of the structure and impact resistance. In addition to correct material choice, design optimisation enables the achievement of weight reduction and improvement of component performance. Design optimisation is one important element in the roadmap and long term strategy defined by the European Commission both for electrification of road transport and long distance trucks. The use of simulation tools, as for instance AltairOptistruct, enables the cost and time efficient development of lightweight and high performance structures. This paper discusses the tuning of component properties, as for instance stiffness and weight, by means of topography optimisation. The choice between different types of design optimisation will be presented. The influence of different model parameters, such as bead width and constraints, has been investigated leading to an optimal model, also in terms of simulation time and CPU load. The optimised design has then been verified by means of FEM calculation and experimental evaluation. The design optimisation method will be explained and discussed on the basis of a series of case studies dealing with commercial vehicle components. It is shown that, by using the correct parameters, simulation driven design is a valid method to develop the optimal design towards specific targets, as for instance minimal weight and/or maximum stiffness.
Component optimisation through simulation driven design. Topology & topography optimisation
2014
10 Seiten, Bilder, Tabellen, 5 Quellen
Conference paper
English
Design-Optimierung , Bauteiloptimierung , Leistungssteigerung , Kraftstoffverbrauch , Gewichtsverringerung , Straßentransport , Topographie , Steifigkeit , Topologie , Nutzfahrzeugindustrie , Schlagfestigkeit , Fahrzeuggewicht , Optimierungsmodell , Gütenorm , Europäische Kommission , Validierungsmethode , Nutzfahrzeug
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