Experimental and theoretical investigations of the lateral vibrations of an unbalanced Jeffcott rotor

Ali Alsaleh, Hamid M. Sedighi, Hassen M. Ouakad*

*المؤلف المقابل لهذا العمل

نتاج البحث: المساهمة في مجلةArticleمراجعة النظراء

8 اقتباسات (Scopus)


The current work experimentally explores and then theoretically examines the lateral vibrations of an unbalanced Jeffcott rotor-system working at several unbalance conditions. To this end, three conditions of eccentric masses are considered by using a Bently Nevada RK-4 rotor kit. Measurements of the steady-state as well as the startup data at rigid and flexible rotor states are captured by conducting a setup that mimics the vibration monitoring industrial practices. The linear governing equation of the considered rotor is extracted by adopting the Lagrange method on the basis of rigid rotor assumptions to theoretically predict the lateral vibrations. The dynamic features of the rotor system such as the linearized bearing induced stiffness are exclusively acquired from startup data. It is demonstrated that, with an error of less than 5%, the proposed two-degrees-of-freedom model can predict the flexural vibrations at rigid condition. While at flexible condition, it fails to accurately predict the dynamic response. In contrast to the other works where nonlinear mathematical models with some complexities are proposed to mathematically model the real systems, the present study illustrates the applicability of employing simple models to predict the dynamic response of a real rotor-system with an acceptable accuracy.

اللغة الأصليةEnglish
الصفحات (من إلى)1024-1032
عدد الصفحات9
دوريةFrontiers of Structural and Civil Engineering
مستوى الصوت14
رقم الإصدار4
المعرِّفات الرقمية للأشياء
حالة النشرPublished - أغسطس 1 2020
منشور خارجيًانعم

ASJC Scopus subject areas

  • ???subjectarea.asjc.2200.2205???
  • ???subjectarea.asjc.2200.2216???


أدرس بدقة موضوعات البحث “Experimental and theoretical investigations of the lateral vibrations of an unbalanced Jeffcott rotor'. فهما يشكلان معًا بصمة فريدة.

قم بذكر هذا