【作者】 薛明德； 杜青海； 黄克智；

【Author】 Xue Ming-De~1 Du Qing-Hai~2 Hwang Keh-Chih~1 (1.Dept.of Engineering Mechanics,Tsinghua University Beijing 100084 2.China Ship Scientific Research Center Wuxi Jiangsu 214082)

【机构】 清华大学工程力学系； 中国船舶科学研究中心；

【摘要】 圆柱壳开孔接管处有很大的应力集中,其分析理论难度大,是工程与力学界长期瞩目的重要问题。课题组经过近20年研究,得到了内压与接管六种载荷作用的薄壳理论解,解的范围扩大至d/D≤0.9,d/（DT）^1/2≤12。其结果得到了前人各种实验结果以及精细网格三维有限元解的验证。基于此理论解,提出了一整套可为工程界应用的分析设计方法、图表、由理论解经大量计算得到的曲线。其中包括:①内压作用下容器开孔补强设计方法;②在内压与接管外载共同作用下,孔附近容器中八个校核点处的应力计算方法。与WRC Bulletin No.297方法相比,该方法是关于内压与外载荷下应力分析的统一方法,并大大扩展了适用范围;当小开孔并且λ较小时,二者结果一致。更多还原

【Abstract】 Significant stress concentration occurs in the vicinity of the intersections of cylindrical shells with nozzles.The topic of stress analysis of two intersecting cylindrical shells has been attracted many researchers’ attention due to its importance.The difficulties have been overcome by the authors making their continual effort during past 20 years.A theoretical solution for two normally intersecting cylindrical shells subjected to internal pressure and six nozzle load components is presented and its applicable ranges are successfully extended up to d/D≤0.9 andλ= d/（DT）^1/2≤12.The presented theoretical results are verified by previous tested and 3-D FEM results for all the seven load cases. A universal design method for pressurized cylindrical shells with attached nozzles subjected to external forces（moments） are presented based on theoretical stress analysis.As a first design step the required reinforcement thicknesses both of main shell and nozzle due to internal pressure can be determined by the presented theoretical solutions.When the junctions are subjected to external nozzle loads,the next step is to calculate and superpose the stress components at eight examination points due to the combined pressure and nozzle loads by the presented design curves and tables based on the theoretical solutions.The presented methods are in agreement with WRC Bulletin No.297 when the diameter ratio andλare small.更多还原