NEW COMPONENT MODES FOR FLEXIBLE MULTIBODY SYSTEMS


     

作者：O. Verlinden（Faculte Polytechnique de Mons, Service de mecanique Rationnelle, 31 Bd Dolez B-7000 Mons, Belgium. olivier@mecara.fpms.ac.be）
P. Dehombreux
C. Conti
会议名：1997 ASME Design Engineering Technical Conferences (DETC'97)
会议日期：September 14-17, 1997
会议地点：Sacramente, California, USA
出版年：1997
ISBN：0-7918-1243-X
页码：4104-4113
总页数：10
馆藏号：hyw0863
分类号：TB21-53/(1997)
关键词：Flexible multibody systems；Component modes；Substructuring
参考中译：
语种：eng
文摘：In multibody systems, the deformation of a flexible body is generally modelled by a weighted summation of previously chosen deformation modes. Mode sets composed of static and vibration modes, which proved efficient in structural analysis, are commonly used in practice. The paper presents how the classical reductions can be adapted to better fit the peculiarities of multibody systems. It is first shown how the classical mode sets can be reorganized according to the particular kinematics of a flexible body, based on a body reference frame. Secondly, it is proposed to add acceleration modes to the classical reductions to better represent the deformation during large displacements. The importance of natural boundary conditions in multibody systems is also emphasized. The benefit of the acceleration modes and the interest of coherent natural boundary conditions are illustrated on the example of a railway engine, for two different analyses, by means of an expressly developed quality test.



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