压力容器Issue(3)：20-28,9.DOI:10.3969/j.issn.1001-4837.2015.03.003
压力容器设计标准中外压圆筒初始几何偏差规定的讨论
Discussion of Regulations of Initial Geometric Deviations on Cylindrical Shells under External Pressure in Pressure Vessel Design Standard
魏协宇 1陈冰冰 1郑浣琪 1邓志军 1高增梁1
作者信息
- 1. 浙江工业大学 机械工程学院，浙江 杭州 310014
- 折叠
摘要
Abstract
Simplified Fourier series and eigenmode-affine geometric imperfections are employed to build cylindrical shells with initial geometric deviations under external pressure in nonlinear ANSYS finite ele-ment analysis.The curves of e (the deviation value)are obtained when simulation pressure is 80%of the critical pressure of prefect cylinders.Compare the simulation result with the e curves obtained by using the theoretical formulas of a book written by Annaratone and the regulations of ASME Ⅷ-1 ,ASME Ⅷ-2.It shows that:the simulation critical pressure is conservative when eigenmode-affine is employed to build the geometric imperfections;When the value of L/Do is small,the value of e from ASME Ⅷ-1 maybe aggres-sive;The value of e obtained by simplified Fourier series is bigger than the one obtained by eigenmode-affine geometric imperfections at the same value of Do/t and L/Do .The real reason why the value of p-Test is bigger than the value of p-Theory which is mentioned in WRC bulletin (No.443)is that the re-alistic initial geometric deviations are irregular but the initial geometric deviations introduced in theoreti-cal formulas are regular which are similar to eigenmode-affine geometric imperfections;The value of e from ASME Ⅷ-2 is smaller than the value of e obtained by simplified Fourier series,so the regulations of value e is feasible.关键词
外压圆筒/初始缺陷/傅里叶级数/一致缺陷模态法Key words
cylinders under external pressure/initial imperfections/Fourier series/eigenmode method分类
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魏协宇,陈冰冰,郑浣琪,邓志军,高增梁..压力容器设计标准中外压圆筒初始几何偏差规定的讨论[J].压力容器,2015,(3):20-28,9.
