Viscoelastic damping design – A novel approach for shape optimization of Constrained Layer Damping treatments at different ambient temperatures

Passive damping plays an important role in the vibration mitigation of aeronautic structures. In contrast to active systems, passive systems do not require any energy supply. Thus, their readiness is independent, which reduces failure probability compared systems. Constrained Layer Damping (CLD) has become established treatment for bending vibrations. Unlike other such as shock-mounts, CLD can be compactly integrated into existing structure add-on solution. However, design scope limited by mass constraints and optimal maximum must found optimization. For this purpose, a novel optimization approach presented. The layer widths core face layers are treated parameters. Compared strategy placing patches on antinodes, proposed provides up 52 % higher damping. generic beam determined considering different modes, viscoelastic material stiffnesses ambient temperatures. Furthermore, simulated experimentally verified shape-optimized beam. analyses show that depends significantly stiffness therefore temperature dependent. As consequence, generalized guideline treatments cannot derived.