压力容器接管部位的可靠性设计研究

摘要

使用ANSYS软件对某压力容器筒径,不同开孔直径壳体,共3个模型的开孔接管部位进行分析设计,同时提出最弱环模型对接管部位应力强度进行可靠性评定.研究结果表明,在接管需要补强时采用补强圈或厚壁接管补强,均可有效地改善孔边应力集中;随着开孔率的增大,厚壁补强接管部位的可靠性大于等面积补强法所得结果;最后提出厚壁补强时合适的可靠度取值.%The weakest chain model was proposed to evaluate the reliability of stress intensity of the nozzles with different diameters of one cylinder designed by analysis method by using ANSYS software. The result covers three aspects: the pad reinforcement and thick - walled reinforcement can effectively decrease the stress concentration of the nozzle area; the reliability of the thick - walled reinforcement is higher than that of pad reinforcement with the increase of the nozzle diameter; at last the reasonable reliability is suggested about the thick -walled reinforcement.