A study of rotorcraft structure-borne noise isolation using empirical component coupling

摘要

Control of component excitation generated structure-borne noise transmission into a rotorcraft cabin, such as from rotor vi- bration imbalance, transmission excitations or auxiliary equipment induced vibrations, can be studied empirically via accel- erance characterization of the system components and application of appropriate component coupling procedures. The pre- sent study was aimed at demonstrating the usefulness of such accelerance modeling techniques as applied to a Bell 206B rotorcraft.