REVIEWING THE OBERST BEAM METHOD AND ITS AP-PLICATION IN CONSTRAINED LAYER DAMPING FOR AUTOMOTIVE NOISE, VIBRATION, AND HARSHNESS (NVH) CONTROL

In the automotive industry, noise, vibration, and harshness (NVH) are critical factors affecting ve-hicle comfort and performance. Constrained Layer Damping (CLD) has emerged as an effective technique to mitigate these issues by dissipating vibrational energy. The Oberst Beam Method (OBM) is a widely used experimental technique for measuring the loss factor of materials, a vital parameter in assessing the effectiveness of CLD systems. This paper aims to review the theoretical foundations and experimental procedures of the OBM, compare it with other measurement meth-ods, discuss its applications in automotive engineering, recent advancements in measurement tech-niques, challenges faced in practical applications, and future research directions. By synthesizing current knowledge, this review highlights the significance of the OBM in enhancing CLD perfor-mance and offers insights for further developments in this field.

Keywords:

Oberst Beam Method , Constrained Layer Damping , Automotive NVH Control , Vibra-tional Energy Dissipation.