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BUCKLING OF EXTERNALLY PRESSURISED PROLATE ELLIPSOIDAL DOMES

机译:外压扁球形球面的屈曲

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摘要

Details are given of a numerical and experimental study into buckling of steel ellipsoidal domes loaded by static external pressure. A range of geometries and thicknesses of domes is examined, as is the influence of different boundary conditions. Shells are examined on the basis of having the same mass. Thernmain focus of the study is on prolate domes, I.e., those taller than a hemisphere of the same base radius.Numerical predictions are confirmed by pressurising six laboratory scale prolate domes to destruction. Details are given of the manufacture and test procedure for the domes. The adverse effects of variations in shape, and wall thickness are discussed, and FE predictions are made for geometrically imperfect domes. Correlation between the two sets of results is good.Numerical and experimentally obtained results are related to the current design codes: ASME Boiler & Pressure Vessel Code, Section VIII, Division 2 (described hereon as ASME VIII), PD5500, and ECCS recommendations [1-3], which at present make no provision for prolate domes. Suggestions are made for the possible inclusion of such domes into the standards.
机译:详细介绍了通过静态外部压力加载的钢制椭圆形穹顶的屈曲的数值和实验研究。检查圆顶的几何形状和厚度范围,以及不同边界条件的影响。根据质量相同的情况检查壳。该研究的主要重点是长圆形拱顶,即比相同基本半径的半球高的长圆形拱顶,通过对六个实验室规模的长圆形拱顶施压以破坏数字预测。详细介绍了圆顶的制造和测试程序。讨论了形状和壁厚变化的不利影响,并对几何上不完美的穹顶进行了有限元预测。两组结果之间的相关性很好。通过数值和实验获得的结果均与当前的设计规范有关:ASME锅炉和压力容器规范,第VIII节,第2部分(以下简称为ASME VIII),PD5500和ECCS建议[1]。 -3],目前尚无关于扁球形圆顶的规定。提出了将这种圆顶纳入标准的建议。

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