Due to the importance of collecting rapping system in electrostatic precipitators (ESP) and controlling the relevant damage under\r\nimpact loading, fatigue durability of this system is analyzed in the present study based on the numerical and experimental results\r\nconsidering fatigue damage growth and vibration acceleration in the collecting system because of the successive impact of rapping\r\nhammers. By microscopic examination of the fracture surface of rapping hammer, beach marks obviously show typical fatigue\r\nfailure in the rapping hammer arm. In addition, the microscopic examination of the cross section of the collecting plates indicates\r\nthe corrosion voids which cause crack and eventually fatigue failure. The finite element method is applied to determine both the\r\nstress and concentration positions of dynamic stress on the rapping system under impact loading. The paper results can be utilized\r\nin system optimization and new material selection for the system by evaluating rapping system durability.
Loading....