Nonlinear multi body dynamic modeling and vibration analysis of a double drum coal shearer

Abstract

The double drum coal shearer is widely applied for the underground coal exploration in the mining industry. The vibration and noise control are significant factors for the stability design of the double drum coal shearer. In this paper, the vibration properties of a double drum coal shearer are firstly investigated. The horizontal, transverse and torsional vibrations of the motor body and the angle displacements of the rockers are taken into account. The walking units and the hydraulic units are modeled by the stiffness-damping systems. The nonlinear equation of motion of the double drum coal shearer is established by applying the Lagrange’s equation. The nonlinear vibration response of the system is calculated by using the Runge Kutta numerical method. The effects of the shearing loads, the equivalent damping and stiffness of the walking units, the inclination angels of the rockers and the equivalent damping and stiffness of the hydraulic units on the vibration properties of the system are discussed.

Keywords

coal shearer / vibration / multi body dynamics / transient response

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