Strength and stiffness problems of vibrating screen are the key factors of restricting its development towards high-speed and large-scale. Based on the point of view that restricting the elastic vibration of vibrating screen,a method of adding redundant constraints to the vibration screen beam was put forward in this paper to decrease the stress concentration and uniform the energy distribution,thus improving the strength and stiffness without changing the mass of vibration screen was ensured. This is a new...