Meta-models of repeated dissipative joints for damping design phase

Chaima Hammami (1) , Etienne Balmès (1)

1 PIMM - Laboratoire Procédés et Ingénierie en Mécanique et Matériaux

Developing tools to predict dissipation in mechanical assemblies starting from the design process is a subject of increasing interest. Design phases imply numerous computations resulting from the use of families of models with varying properties. Model reduction is thus a critical tool to make such design studies affordable. Existing model reduction methods make computation of models with detailed non-linear parts accessible although costly although allowing the generation of a small size model for the linear part. One is, thus, interested in introducing meta-models of the behavior in the non-linear part by determining a basis of principal joint deformations. In this work, one seeks to validate the ability to predict macro-forces associated with the principal deformation shapes. Taking the case of aeronautic structures as cylindrical ones with multiple joints, one seeks to validate the construction of a meta-model associated to the joint. The ability to use such a meta-model to predict damping associated with viscoelastic behavior in a specifically designed bolted joint will be illustrated.

Domaines: Vibrations [physics.class-ph]; Vibrations [physics.class-ph]

Chaima Hammami, Etienne Balmès. Meta-models of repeated dissipative joints for damping design phase. International Conference on Noise and Vibration Engineering, Sep 2014, Belgium. pp.ID205. ⟨hal-01066940⟩