Kinematics Accuracy and Dynamic Analysis of multi-body system with Spatial cylindrical clearance joint

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (19) : 151-157.

LIU Tai-su,QIAN Lin-fang,YIN Qiang

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Abstract

In order to get the influence of spatial cylindrical joint with clearances to system, firstly, all possible contact modes of the typical spatial cylindrical clearance joint were analyzed. Aiming at the spatial cylindrical joint with clearances in the axial and radial direction ,the geometry and kinematics of complicated contact mode were analyzed. An improved method for computing potential contact points was established. The normal contact impact force model and the tangent friction force model were set up. Then, the multi-body dynamic equation was given with the normal contact impact force and the tangent friction force. Finally, spatial double pendulum with joint clearance was discussed compared with ideal model. The results showed that kinematic accuracy and dynamic performance were affected greatly of the system, because of the existed clearances in the axial and radial direction, and different clearance size also changed kinematic accuracy of the system. This method and results of spatial cylindrical joint with clearances provided the theoretical basis for design and improvement of the mechanical structures.

Key words

spatial cylindrical joint / contact modes / joint clearance / potential contact points / multi-body system

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LIU Tai-su,QIAN Lin-fang,YIN Qiang. Kinematics Accuracy and Dynamic Analysis of multi-body system with Spatial cylindrical clearance joint[J]. Journal of Vibration and Shock, 2017, 36(19): 151-157

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