Structures dynamic characterization represents a crucial issue in industry. Experimental tests require an excitation source able to work in a wide frequency range. Commercial solutions have severe limitations in terms of working frequency and dimensions. This is the reason why this work presents the design of a custom electromagnetic shaker developed by University of Pisa. The device is aimed to the excitation of rotor blades of centrifugal compressors (one shaker on each blade). A really compact solution was then needed, having a working frequency range of 1–10 kHz. Four different solution were also analyzed for shaker-structure connection: “beam stinger” (ϕ = 1 mm), “wire singer” (ϕ = 0.2 mm), “ball stinger” (ϕ = 3 mm) with conical slot and spherical slot. Experimental tests performed on a shaker prototype allowed do verify the performances of the exciters and of the different stingers.
PROGETTO E OTTIMIZZAZIONE DI UNO SHAKER ELETTROMAGNETICO PER ALTE FREQUENZE
NERI, PAOLO
2015-01-01
Abstract
Structures dynamic characterization represents a crucial issue in industry. Experimental tests require an excitation source able to work in a wide frequency range. Commercial solutions have severe limitations in terms of working frequency and dimensions. This is the reason why this work presents the design of a custom electromagnetic shaker developed by University of Pisa. The device is aimed to the excitation of rotor blades of centrifugal compressors (one shaker on each blade). A really compact solution was then needed, having a working frequency range of 1–10 kHz. Four different solution were also analyzed for shaker-structure connection: “beam stinger” (ϕ = 1 mm), “wire singer” (ϕ = 0.2 mm), “ball stinger” (ϕ = 3 mm) with conical slot and spherical slot. Experimental tests performed on a shaker prototype allowed do verify the performances of the exciters and of the different stingers.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
