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Isogeometric shape optimisation has been studied for over a decade. The present contribution focuses on applying this approach to aircraft engine blades design by integrating geometric description, structural analysis and shape optimisation in a single industrial framework. Starting with stacked cross-sections of the blade geometry as an input, we construct a B-spline analysis-suitable volumetric model of the blade, ensuring its geometric accuracy and parametrisation regularity. Using the multi-level approach inherent to Isogeometric Analysis, we perform structural shape optimisation with the same geometric representation of the blades in the analysis and optimisation; the final optimised model being directly CAD compatible. Several self-adjoint problems are addressed using gradient-based optimisation with full analytical sensitivities that are obtained in a compact form thanks to the isogeometric framework. Examples of interest are solved using suitable industrial loading cases and objective functions. The results demonstrate the efficiency of the method and its relevance for industrial aircraft engine blades design and optimisation. [ABSTRACT FROM AUTHOR]

In this chapter we review the new up-coming challenges for noise treatments Research & Development in the automotive industry to improve the acoustic comfort in vehicles. After a description of the sources and their main transfer paths, noise treatments optimization key levers for both rawporous materials and multilayer lightweight treatments are presented and discussed ranging from basic 2D optimization at sample level to 3D at component level. A particular attention is given to newly emerging electric engines. Finally, the problematic of fast broadband vibroacoustic simulations with trims is analysed. [ABSTRACT FROM AUTHOR]

The main goal of these industrial chapters is to help non-specialist engineers throughout the industry to take robust noise treatments optimization decisions without being obliged to become experts themselves. Another goal is also to help “lowhanging fruit” technology transfers between various fields of acoustic industrial application domains, from aeronautic to automotive industry for example or from automotive to building industry or the other way around. [ABSTRACT FROM AUTHOR]