Finite element simulation of modal and linearized stress characteristics of key components of heat exchanger

In order to ensure higher structural stability and load safety of the heat exchanger, modal analysis of the folded flow plate assembly was carried out based on the finite element simulation method. In extreme conditions, the stress linearization and evaluation of the tube plate structure were achieved. The models of spiral baffle and traditional single arch baffle components were established, and the first 20 nature frequencies and the first six modal shapes were compared and analyzed. The strength of the tube plate structure was analyzed under the conditions of separate action of tube side pressure and shell side pressure, and the linearization results of stress were obtained through the setting of path. The results indicate that the spiral baffle component has better stability. In addition, through stress decomposition and evaluation, it can be determined that the strength under extreme working conditions meets safety requirements.