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《Journal of Zhejiang University(Engineering Science)》 2009-01
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Dynamics numerical analysis of space deployable mechanism with three-dimensional clearance revolute joint

ZHAN Fu,GUAN Fu-ling(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310027,China)  
The radical and longitudinal clearances in the revolute joint of space deployable mechanism were considered.The analytical definition of the least distance between pin and journal in the radical and longitudinal direction of the pin was obtained based on the geometrical configuration of three-dimensional revolute clearance joints.The discriminant equation was established to decide contact and separation between pin and journal in the three-dimensional clearance joints.The normal contact force between journal and pin was modeled by a nonlinear elastic-damper model and the tangent friction was modeled by the Coulomb's frictional model.Then the movement process was divided into "contact" and "separation" to found the dynamic equation of the multi-body system.The numerical analysis of the deployable truss show that the contact occurs not only in the truss plane,but also out of the truss plane.The instantaneous contact force is one to ten-odd times of the force in the idea revolute joint.
【CateGory Index】: TH113
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