On the motion of the structure varying multibody systems with two-dimensional dry friction |
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Authors: | Fujie Xia Peter Wolfs Colin Cole |
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Affiliation: | (1) Faculty of Engineering and Physical Systems, Central Queensland University, QLD 4702 Rockhampton, Australia |
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Abstract: | In the present paper the dynamics of the structure varying multibody systems caused by stick-slip motion with two-dimensional
dry friction are analyzed. The methods to determine friction force both in stick and slip states are described. The direct
method of considering the wagon bogie system as a structure varying system was used to consider two dimensional friction at
the wheelset-side frame connection. The concept of friction direction angle used to determine the friction force components
of two-dimensional dry friction both in the stick and slip motion states was used. A speed depended friction coefficient was
used and described approximately by hyperbolic secant function. All switch conditions were derived and friction forces both
for stick and slip states. Some simulation results are provided. |
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Keywords: | Multibody System Dry Friction Structure Varying Stick and Slip |
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