Nonlinear Dynamics of a Flexible Multirod (Multibeam) System

[+] Author and Article Information
E. Edelstein, A. Rosen

Technion-Israel Institute of Technology, Haifa 32000, Israel

J. Dyn. Sys., Meas., Control 120(2), 224-231 (Jun 01, 1998) (8 pages) doi:10.1115/1.2802413 History: Received August 01, 1996; Online December 03, 2007


The paper presents a general nonlinear numerical model for the dynamic analysis of a spatial structure that includes chains of flexible rods, with rigid bodies between them, and different kinds of connections between all these components. Such a system is denoted a multirod or multibeam system. The model is derived using a multibody system approach. The motion of each rod includes elastic deformations that are superimposed on finite rigid body motions. The elastic model of each rod is nonlinear and includes bending in two perpendicular directions, torsion, axial motion, and warping. Any distribution of the rod properties can be considered. Finite elements are used to describe the deformations. Although the elastic derivation is confined to moderate deformations, any level of nonlinearity can be addressed by dividing each rod into sub-rods. The joints between the rods are general and may include springs and dampers. A new formulation of Lagrange method is used in order to derive the equations of motion. It offers various advantages concerning the accuracy, stability of the constraints, and the modeling of constraints. The model is validated by comparing its results with new experimental results. Good agreement is shown between the experimental and numerical results.

Copyright © 1998 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.






Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In