【摘要】 因一些特殊工艺需求,压力容器往往需要开设切向接管,但在强度设计方面,目前没有适用的圆筒切向接管规则设计方法。文章采用极限载荷分析方法,对圆筒材料为Q345R、接管材料为10#钢的带切向接管内压圆筒进行强度计算,并定义了基于无接管壳体的强度削弱系数,探讨不同切向接管无量纲结构参数(直径比d_o/D_i、径厚比D_i/T、厚度比t/T)对强度削弱系数或圆筒极限承载能力的影响。研究结果表明,当d_o/D_i和D_i/T增大、t/T减小时,强度削弱系数也随之增大,意味着切向接管对圆筒的强度削弱程度增大。通过大量极限载荷计算结果,对强度削弱系数进行了回归分析,得到了可用于带切向接管内压圆筒强度设计的回归方程。更多还原

【Abstract】 For some process requirements,it is necessary to set up tangential nozzles on pressure vessels.But presently there are no rule-based strength de sign methods for the structure of cylindrical shells with tangential nozzles under internal pressure.In this study,limit-load analysis was performed to calculate the strength of cylindrical shells having tangential nozzles under internal pressure with the materials of the shells and nozzles being Q345R and 10# steel respectively.A so-called strength weakening coefficient referent to the non-nozzle cylindrical shell was defined to reflect the weakening degree of the tangential nozzle on the cylindrical shell.Influences of different dimensionless structural parameters(diameter ratio d_o/D_i,diameter-thickness ratio D_i/T,thickness ratio t/T) on the strength weakening coefficient or the limit-load-bearing capacity of the cylindrical shell with tangential nozzle.Results show that with increasing d_o/D_i and D_i/T and decreasing t/T,the strength weakening coefficient increases,meaning that the strength weakening degree of the tangential nozzle to the cylindrical shell increases.With a large number of limit-load calculation results,the strength weakening coefficient was regressed which can be used for the strength design of cylinders with tangential nozzles under the internal pressure.更多还原