The modal analysis of main building in coal preparation plant based on ANSYS

Taking the main building in coal preparation plant in Zhaoguan coal mine as the research object,using the finite element analysis software ANSYS established the finite element model and analyzed that modal,calculated the natural frequency and modal shape of front six orders of the main building,also confirmed its vibration characteristics.The result of modal analysis shows that the natural frequency of front six order of the main building between 1.725 2 Hz and 5.133 2 Hz,that far less than the 15 Hz working frequency of vibrating screen,so the main building in coal preparation plant does not exist resonance phenomenon under the normal working condition;Along with the front six order natural frequency of the main building increases,the mode shape of the main building is becoming more and more complicated,when the deformation reaches a certain degree,the plant will be damaged.The model analysis provides the theoretical basis for vibration analyzing,also the data reference for further harmonic analysis and structure optimization.