Health identification for damping springs of large vibrating screen based on stiffness identification

作者：Peng Li Ping; Liu Chu Sheng; Wang Hong

来源：Journal of China Coal Society, 2016, 41(6): 1568-1574.

DOI：10.13225/j.cnki.jccs.2015.1200

• Acceleration response
• Damping springs
• Diagnostic methodology
• Geometric position
• Large vibrating screen
• Numerical integrations
• Stiffness identification
• Vibration differential equations

In order to overcome the limitation of qualitatively health identification for damping springs of large vibrating screen (LVS), a diagnostic methodology for identifying the stiffness of damping springs with free response was proposed. With the geometric position error of the damping system considered, the asymmetric dynamic model of the vibration screen with damping spring fault was established and followed by deriving the vibration differential equation. Then, the discrete free acceleration response data were processed by digital filter, eliminating the trend item and numerical integration, and subsequently constructed in a matrix form to obtain the modified stiffness matrix. Moreover, with disassembling stiffness matrix and defining the stiffness assurance criterion, the principle and procedures for stiffness identification of a large vibrating screen was summarized. Finally, the validity of the developed method for stiffness identification was verified by an experimental test and the error is within 3.56%. The research may accomplish the quantitatively health identification for the damping springs of large vibrating screen.

• 出版日期2016
• 单位中国矿业大学（北京）; 河海大学