Research on dynamic performance of a novel high elastic coupling to be used in mines

By combined theoretical and experimental means, a method and technology, which is used to establish dynamic restoring force model and parameter identification of a novel coupling to be used in mines, is presented and a mathematic model of dynamic restoring force on the coupling is proposed by it. The model is used to investigate and describe the dynamic characteristics of the coupling. The investigation shows that the elastic force is nonlinear single value one, it is a function of stiffness function and in close relationship with the amplitude, exciting frequency and instantaneous displacement. Damping force is nonlinear double value one, it is a function of damping function and damping component function and in close relationship with the amplitude, exciting frequency, instantaneous displacement and instantaneous velocity. The model can reveal and reflect variety of damping component and change of damping magnitude due to introduction of damping function and damping component function. The shape and narrow or wide measure of hysteresis loops are controlled by parameters in the model. The study shows that there are many diverse damping in the coupling, such as viscous damping, dry friction damping and "high order" damping. The dynamic characteristics of the coupling have been understood fully and it is very important to design the coupling with multi-work areas at a range of wide frequency band.