铸铁烘缸附加弯矩条件下反向法兰计算方法研究OA北大核心

During the operation of cast iron drying cylinders,due to the existence of support reaction forces at both ends,additional bending mo-ments are generated at the connection between the end cover and the reverse flange on the cylinder body.Traditionally,the Waters method is com-monly employed for flange connection design,yet this method doesn't take into account the influence of the additional bending moments.This study,based on the reverse flange calculation methods specified in the American ASME standard and the British PD5500 standard,introduced the factor of additional bending moments to improve the calculation formulas.Subsequently,the correctness of the improved formulas was verified through finite element simulation.The results showed that after incorporating the additional bending moments,the calculation accuracy of the three principal stresses all increased by more than 30%(SH increased by 32.6%,SR increased by 40.2%,and ST increased by 40.4%).The additional bending moments had a significant impact on the safety of the flange connection.