摘要
数值模拟计算能力和水平的提高为外压壳体失稳复杂理论应用到实际设计方法中提供了可能,应用数值模拟进行设计逐步在标准中引用并不断完善。与其他标准相比,EN 1993-1-6(2007)《壳结构的强度与稳定》对数值模拟在设计上的应用给出了更为详细的规定。对壳体失稳设计,EN 1993-1-6提出了3种不同的设计方法:公式计算方法、LBA-MNA方法以及GMNIA方法。为研究EN 1993-1-6的壳体数值模拟设计方法的可行性,对其进行了简要介绍,并通过10组算例与GB 150,ASMEⅧ-2,EN 13445等标准进行对比,结果显示,EN 1993-1-6的数值模拟的设计许用值均高于GB 150的设计许用值,而与ASMEⅧ-2和EN 13445相比,设计许用值则比较接近,这表明EN 1993-1-6规定的数值模拟设计方法有着比GB 150更好的经济性,是一种先进的设计方法。
The development of computer numerical analyses make it possible to use complex theories in design approaches. Numerical analyses are begin to introduced in many standards. Compared with other standards,EN 1993 -1 -6 （2007）＂ Strength and Stability of Shell Structure＂ gives more clear rules for numerical analyses in design. For shell buckling, EN 1993 - 1 - 6 provide three potential approaches ： Hand calculation, Simple computer analyses （ LBA - MNA） and Full computer analyses （GMNIA）. To study the feasibility of the design approaches defined in EN 1993 - 1 - 6, this paper outlines the three ap- proaches,and with the results of 10 real cases,to compared with GB 150,ASME Ⅷ -2 and EN 13445. It is illustrated that EN 1993 -1 -6 has advantages over GB 150, and is equal to ASMEⅧ -2, EN 13445. The results also demonstrate EN 1993 - 1 -6 is more economic than GB 150, its design approaches are advanced.
出处
《压力容器》
2013年第9期45-53,共9页
Pressure Vessel Technology
