Model analysis of quad play nitric acid unit foundation based on ANSYS

Disturbing force with different direction would generate when nitric acid 4 in 1 unit being in running,which will result in vibration of the base,leading to the machine group run abnormally.So,it is necessary to perform dynamic design during structure design of the nitric acid 4 in 1 unit’s base.The principle and method of mode analysis are introduced in this paper,then,on basis of finite element software,the structure of nitric acid 4 in 1 unit’s base was simplified and modeled reasonably,and mode analysis was performed.Finally,the natural frequency and vibration mode for the foundation under different order modal were obtained,and the most dangerous area during the vibration process of the foundation was determined.