| 缩减弹性模量有限元法计算加肋轴对称组合壳的极限载荷 |
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| 引用本文： | 吕岩松,郭日修.缩减弹性模量有限元法计算加肋轴对称组合壳的极限载荷[J].船舶力学,2011,15(8). |
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| 作者姓名： | 吕岩松 郭日修 |
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| 作者单位： | 海军工程大学,武汉,430033;海军工程大学,武汉,430033 |
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| 摘 要： | 将缩减弹性模量的思想融入基于轴对称壳单元的有限元分析,建立缩减弹性模量有限元法,计算加肋轴对称组合壳的极限载荷。建立壳单元弹性状态、局部屈服状态和截面屈服状态的判断条件;提出弹性模量调整策略和组合壳极限状态的判断方法,实现对加肋轴对称组合壳的塑性极限分析。编制了计算程序,算例表明该方法计算时间省,计算精度较高。
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| 关 键 词： | 极限分析 有限元法 缩减弹性模量 迭代计算 加肋轴对称组合壳 |
Limit analysis of ring-stiffened axisymmetric combination shell by finite element method based on elastic modulus reduction |
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| Abstract: | A finite element method based on elastic modulus reduction is proposed to compute the limit load of ring-stiffened axisymmetric combination shell.The criteria for 'elastic state','local yield state' and 'section yield state' of shell element are established.The method of elastic modulus reduction and the criterion for plastic limit state of ring-stiffened axisymmetric combination shell are presented.The computer program is developed.Numerical example shows that the proposed method is effective and the compu... |
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| Keywords: | limit analysis finite element method elastic modulus reduction iterative calculation ring-stiffened axisymmetric combination shell |
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