Definition The dynamic deflection shape of linear structures can be decomposed in a sum of elementary vibration patterns. These vibration patterns are called mode shapes, they are illustrated below with the […]
Definition In structural dynamics, damping is a general term to name all physical phenomena dissipating vibrational energy. Viscous damping describes the energy loss arising from specific forces which are proportional […]
Introduction Acoustic noise of electrical machines includes the contribution of electromagnetic, aerodynamic and mechanical sources. This article reviews the sources of mechanical noise in electric machines. Mechanical noise sources […]
Definition A Frequency Response Function (FRF) is a function used to quantify the response of a system to an excitation, normalized by the magnitude of this excitation, in the frequency […]