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RESEARCH ON VIBRATION CHARACTERISTICS OF LONGITUDINAL ROADHEADER |
ZHAO Li-juan TIAN ZHEN SUN YING ZHOU Zhen-hua |
College of Mechanical Engineering, Liaoning Technical University, Liaoning, Fuxin 123000, China |
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Abstract In order to investigate vibration characteristics of roadheader, through the analysis of the vibration source of roadheader found that the nonlinear instantaneous impact loading caused by cutting pick in the cutting process is the main disturbance source of the vibration,The load model of cutting pick was founded, the simulation programme of cutting pick momentary load was worked out by the implementation of MATLAB,the momentary load files of cutting pick were created and leaded successfully in the rigid-flex coupled vibration model of roadheader which was established based on a co-simulation virtual prototype frame. Distinguished the modal parameter and the easily aroused modal shape of the ranging arm according to the vibration analysis;The frequency which determined the overall performance of the system were confirmed; Identified the weak links through rotating table harmonic response analysis.The results provide foundations for the vibration analysis of Roadheader and enhancing its capability of upholding shock.
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Received: 17 June 2012
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