Record number :
1392834
Title of article :
A HYBRID FINITE SEGMENT/FINITE ELEMENT MODELLING AND EXPERIMENT ON A FLEXIBLE DEPLOYMENT SYSTEM
Author/Authors :
CHENG، نويسنده , , Y. and DAI، نويسنده , , S.L. and REN، نويسنده , , G.X.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2002
Pages :
19
From page :
931
To page :
949
Abstract :
This paper focuses on the dynamic responses of a flexible deployment system that has a central rigid body and four articulated flexible beams and undergoes locking impact. A hybrid finite segment/finite element model and an experiment are presented for the deploy-ment system. The flexible beam components in the system are modelled with the finite segments connected by massless beam elements, wherein the finite segments describe the inertia of the large rotation flexible beam and the massless elastic elements describe the elas-ticity of the flexible beam by taking the advantage of small deformation in the relative co-ordinate system. To model the internal impacts in the articulate joints due to clearances, a continuous contact force model of locking joint is also proposed. The governing differential–algebraic equations of the system are established by the Newton–Euler method with Lagrange multipliers and are solved with the method of generalized co-ordinate partitioning. To accelerate the numerical integration, a “longitudinal constraint” is suggested to alleviate the stiff problem of the dynamic equations. In addition, a physical model of the deployment system is constructed. The deployment is released by the compressed springs in the joints. A position measuring system of linear CCD cameras is used to measure the large displacement of the system. Correlations between the mathematical model and the experiments are also presented. Reasonable results are obtained.
Journal title :
Journal of Sound and Vibration
Journal title :
Journal of Sound and Vibration
Serial Year :
2002
Link To Document :
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