Analysis on natural vibration characteristics and dynamic response of large scale circular vibration screen

With the modal analysis of large scale circular vibration screen and its dynamic response test in operation without load,the natural vibration characteristics as well as the time domain and frequency domain response of the screen structure in operation were obtained.After the simplified finite element model of the screen being built up,the natural frequency of the former 7 orders were extracted,and the possibility of resonance of the screen in operation was eliminated.INV1601 vibration tester was here used to collect vibration signals of the screen in operation without load,and the software of DASP was used to analyze the time domain and frequency domain response data at each testing point.With the analysis and comparison of the obtained data,the dynamic characteristics of the vibration screen were obtained,which offers reliable basis for the structural improvement and fault diagnosis of the large scale circular vibration screen.