Abstract
The disturbance factors such as clearance of kinematic pair, irregular wear and elastic deformation of rods are the main factors leading to decline of performance and accuracy of mechanism. For more accurately predict dynamic behavior, an accurate modeling method of nonlinear dynamic of multi-link mechanism (MLM) under the coupling effect of irregular wear clearance and flexible components was proposed. Wear depth of revolute pair is calculated, the shaft and bearing surfaces are reconstructed, and the wear prediction process is coupled with the flexible multi-body dynamic to obtain a rigid-flexible coupling (RFC) dynamic model containing wearing clearances of multiple revolute pairs. The influence of coupling between irregular wear clearance and elastic deformation of components on dynamics of MLM is studied, and chaos phenomena of this mechanism are discriminated. The influence of different clearance sizes and driving speeds on dynamic response and bifurcation diagram of RFC-Mechanism considering wear clearance is studied. A test platform is built for experimental verification. This paper will provide a systematic and perfect theoretical foundation for the research of nonlinear dynamics of high-precision and high-performance multi-link mechanisms.
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This research is supported by National Natural Science Foundation of China (Grant No. 51774193).
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Linjing, X., Chengzhe, L., Fangping, Y. et al. Dynamics research and chaos identification of rigid-flexible coupling multi-link mechanism with irregular wear clearances. Nonlinear Dyn 111, 12983–13015 (2023). https://doi.org/10.1007/s11071-023-08563-y
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DOI: https://doi.org/10.1007/s11071-023-08563-y