Abstract：Firstly, a qualitative analysis on the dynamic characteristic of liner vibrating screen with different combinations of damping spring health state was put forward, and based on which, the 2-DOF catastrophic model and the 3-DOF catastrophic model under spring fault condition were established, respectively, followed by the corresponding dynamic analysis. Due to the conservation of system condition parameters before and after stiffness change, the process and route of the system model developing for more degrees of freedom was summarized, and moreover, a numerical simulation in time domain was conducted to illustrate that response of the liner vibrating screen system with spring fault becomes more intense and a beating vibration may occur as well, which provides a foundation for the dynamic analysis of liner vibrating screen with spring fault and the condition monitoring and fault diagnosis in time domain.
2012, Vol. 31 
