Determination of acoustic behaviour of locally modified structures by Scanning LDV

Abstract

Acoustic properties become more and more important in product design. To change the vibration characteristics additional masses or damping systems are common, but not lightweight. Integrated fins and the damping performance of joints have no negative impact on the weight. Another new advanced method is the local change of material properties by bake hardening. A very effective way to quantify the acoustic influence is the measurement with scanning Laser Doppler Vibrometry, also for the quality assurance.