Compensation of frequency response function measurements by inverse RCSA


Kiran K., Satyanarayana H., Schmitz T.

INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE, vol.121, pp.96-100, 2017 (SCI-Expanded) identifier identifier

Abstract

This paper describes an analytical approach for compensating accelerometer-based (contact-type) modal testing results for both mass loading and cable energy dissipation (damping). The inverse Receptance Coupling Substructure Analysis (RCSA) approach is implemented, where a lumped parameter model of the accelerometer-cable is decoupled from the measured receptance (or frequency response function) to isolate the structure's receptance. Experimental results are presented for a 12.7 mm diameter cantilever rod, a 6.35 mm diameter cantilever rod, and clamped-clamped-clamped-free boundary condition thin ribs.