Tj. Royston et R. Singh, VIBRATORY POWER-FLOW THROUGH A NONLINEAR PATH INTO A RESONANT RECEIVER, The Journal of the Acoustical Society of America, 101(4), 1997, pp. 2059-2069
Vibratory power flow through a nonlinear path into a resonant receiver
is considered via a specific vibration isolation example case, the au
tomotive hydraulic engine mount. System equations for the source-nonli
near path-receiver system are developed based on prior experimental an
d analytical studies. For periodic excitation, an efficient solution m
ethod is formulated for the calculation of the steady-state stable res
ponse using a multi-term harmonic balance approach with condensation a
nd continuation. In this computational study it is shown that, while m
odeling the isolation path with a ''softened'' nonlinear expression ma
y only moderately alter the predicted system behavior at the excitatio
n harmonic, it can significantly alter it at higher harmonics. Computa
tional studies of multi-harmonic motion and power transmission show th
at audible structure-borne noise may be generated from subaudio freque
ncy excitations due to path nonlinearities. It is also observed that s
upport base (receiver) resonances can significantly affect the overall
dynamic behavior. For instance, with a multi-degree-of-freedom base m
odel, significant levels of vibratory energy at higher harmonics of th
e excitation are transmitted through the path, especially when these h
armonics coincide with the natural frequencies of the receiver. (C) 19
97 Acoustical Society of American.