نوع مقاله : مقاله پژوهشی
نویسندگان
1 مجتمع دانشگاهی مکانیک، دانشگاه صنعتی مالک اشتر، اصفهان، ایران
2 دانشکده مهندسی مکانیک، دانشگاه صنعتی اصفهان، اصفهان، ایران
3 دانشکده مهندسی مکانیک، دانشگاه مموریال، نیوفاندلند و لابرادور، کانادا
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Dynamic analysis and modal analysis of high speed rotors are a vital step in the design and development stages of rotating machines. Turbomachine rotor consists of disks of various shapes, shafts whose diameters change depending on their longitudinal position, and bearings situated at various positions. The vibrations of the rotor in the operating conditions can cause catastrophic failure of the parts or even the whole turbomachine. In this paper, lateral vibrations of a turbocharger rotor in non-rotating and rotating conditions are analyzed numerically using a finite element model based on Timoshenko beam elements. The Campbell diagram, critical speeds, operational deflection shapes and unbalance response of the rotor are the results of numerical dynamic analysis in the operating conditions. Also, the ambient modal testing of the rotor in non-rotating conditions is performed using frequency domain decomposition (FDD) method. In the modal testing, the laser doppler vibrometer and piezoelectric accelerometers are used simultaneously in order to exactly measure the vibrations. The good agreements between the numerical and experimental results show the accuracy of analyses.
کلیدواژهها [English]