LMA	linear modal analysis
NLMA	nonlinear modal analysis
HAR	high aspect ratio
EB	Euler–Bernoulli
NNM	nonlinear normal mode
RS	reference system
BB	backbone curve
RDM	resonance decay method
LDV	laser Doppler vibrometer
IMU	inertial measurement unit
ZC	zero crossing
PE	peak envelope
HF	Hilbert transform
ODS	operational deflection shapes
TH	time history