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Discrete dynamic modeling of shafts with transverse cracks using bond graph

Durali, M ; Sharif University of Technology | 2003

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  1. Type of Document: Article
  2. DOI: 10.1115/detc2003/vib-48492
  3. Publisher: American Society of Mechanical Engineers , 2003
  4. Abstract:
  5. Discrete dynamic modeling of rotating Timoshenko shafts deflecting in axial, shear and bending directions is discussed in this article. The method presented here aims for developing an algorithm by which shafts with transverse cracks can easily be modeled and analyzed. To this end, a modular dynamic network is constructed, consisting of a mass, springs and dampers, resembling shaft segments between cracks. The local changes in shaft stiffness as a result of cracks rotating (opening and closing), is entered into the module models as change in springs and dampers properties. The modular model is then repeated to obtain a complete shaft model. Bond Graph method is used in a similar modular manner to extract dynamic equations of shaft motion. The equations have then been solved for shaft lateral displacement and behavior under external loadings. The method presented here enables the users to develop a model of the shaft to simulate the behavior of shafts having cracks, with today's computational software
  6. Keywords:
  7. Bond Graph Model ; Dynamic Behavior ; Shaft Vibrations ; Transverse Cracks ; Variable Stiffness
  8. Source: 2003 ASME Design Engineering Technical Conferences and Computers and Information in Engineering Conference, Chicago, IL, 2 September 2003 through 6 September 2003 ; Volume 5 B , 2003 , Pages 1579-1584
  9. URL: https://asmedigitalcollection.asme.org/IDETC-CIE/proceedings-abstract/IDETC-CIE2003/37033/1579/359069?redirectedFrom=PDF