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… Read More »What is a mode shape and a natural frequency?
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… Read More »What is damping?
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… Read More »Mechanical noise in electric machines
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… Read More »What is a FRF (Frequency Response Function)?