Authors: Dongyang Sun Guoping Chen Rujie Sun
Publish Date: 2014/08/15
Volume: 28, Issue: 8, Pages: 2963-2969
Abstract
An optimum method to reduce the system size of a multibody system including a very flexible beam element is presented In this paper the absolute nodal coordinate formulation ANCF is used to describe the motion of the flexible beam in this system Based on continuum mechanics approach the bending stiffness matrix of the system is assumed to be a constant matrix when the axial strain is small Thus freeinterface method in which modal coordinate vector is free from the boundary region is used to reduce the degrees of freedom of a flexible beam with sliding joints Finally two numerical examples are presented to verify the efficiency and accuracy of this method The results show that the present method can reduce the computing time with precision Meanwhile a deformation energy criterion of mode truncation is establishedDongyang Sun received his BS and MS degrees in flight vehicle design engineering and engineering mechanics from Nanjing University of Aeronautics and Astronautics NUAA Nanjing China in 2009 and 2011 He is currently a PhD student in engineering mechanics His research interests include multibody dynamics and FEMGuoping Chen received his BS and MS degrees in computational mechanics from Zhejiang University and the PhD degree in solid mechanics from NUAA in 1982 1984 and 1988 respectively From 1996 to 1998 he was a visiting professor with Mechanical Engineering Department University of British Columbia He is currently a professor with the College of Aerospace Engineering NUAA His main research interests include vibration and control of complex structures and mechanics of intelligent material systems
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