SPADD struts

Free and constrained viscoelastic treatments are well established damping techniques, but more efficient solutions can very often be obtained by combining mechanical amplification and constrained layer damping. The figure illustrates such concepts with two SPADD or ‘Smart Passive Damping Device’ damping solutions developed by ARTEC Aerospace: SPADD-pad for an engine (left) and linear SPADD devices for aircraft shield (right). Reference: Etienne Balmes: Incorporating damping predictions in the vibroacoustic design process.