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Shock and Vibration
Volume 2016, Article ID 6707264, 11 pages
http://dx.doi.org/10.1155/2016/6707264
Research Article

Theoretical and Experimental Study on Electromechanical Coupling Properties of Multihammer Synchronous Vibration System

School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

Received 14 December 2015; Revised 7 February 2016; Accepted 10 February 2016

Academic Editor: Mickaël Lallart

Copyright © 2016 Xin Lai and Wanjun Xie. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Industrial simulation of real external load using multiple exciting points or increasing exciting force by synchronizing multiple exciting forces requires multiple vibration hammers to be coordinated and work together. Multihammer vibration system which consists of several hammers is a complex electromechanical system with complex electromechanical coupling. In this paper, electromechanical coupling properties of such a multihammer vibration system were studied in detail using theoretical derivation, numerical simulation, and experiment. A kinetic model of multihammer synchronous vibration system was established, and approximate expressions for electromechanical coupling strength were solved using a small parameter periodic averaging method. Basic coupling rules and reasons were obtained. Self-synchronization and frequency hopping phenomenon were also analyzed. Subsequently, numerical simulations were carried out and electromechanical coupling process was obtained for different parameters. Simulation results verify correctness of the proposed model and results. Finally, experiments were carried out, self-synchronization and frequency hopping phenomenon were both observed, and results agree well with theoretical deduction and simulation results. These results provide theoretical foundations for multihammer synchronous vibration system and its synchronous control.