ProSPADD: a guiding tool to optimise and attenuate the vibro-acoustic response of structures
Résumé
The main issues induced by the propagation of vibrations and acoustic waves along a structure, such as a car, are the increase in unscrewing and debonding risks, in fatigue stress and in noise level. Theses amplifications, real signature of the structures resonant modes, appear enhanced at their resonance frequency on the vibration transfer diagram. But the basic strategy of separation between excitation and resonance frequencies is rapidly limited from the only parameters mass and stiffness, whilst damping is arbitrary sustained. The damping technology SPADD® and its methodology offer new perspectives by adding damping without mass nor stiffness leading to highly competitive solutions with regard to the excitation spectrum and the technical-economic constraints of (weight / performances / cost), and easily integrate the design process of the car industry either at a curing or at a preventive stage. This paper presents the technology and methodology through the application on a real case of the automotive industry.
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