压力容器2024，Vol.41Issue(12)：32-43,12.DOI:10.3969/j.issn.1001-4837.2024.12.005
内压球壳强度设计方法对比分析
Comparison of methods for design of spherical shells under internal pressure
摘要
Abstract
In order to explore the adaptability of the strength design methods for internal pressure shells in domestic and foreign pressure vessel standards,the design theories of GB/T 150.3-2024,JB 4732-1995,GB/T 4732.3-2024,ASME BPVC.Ⅷ.1-2023,ASME BPVC.Ⅷ.2-2023 and BS EN 13445-3:2021 standards were analyzed and compared.The results show that the thicknesses calculated by the formula based on the Lamè formula are smaller than those calculated by the formula based on membrane theory,and the relative error is 9.5%when the diameter ratio K=1.356.However,the difference in thicknesses determined by membrane theory and limit analysis is small,and the thicknesses calculated by the formula based on general primary membrane stress are smaller than those calculated by the formula based on limit analysis.When the diameter ratio K=1.5,the relative error is 4.0%.On this basis,the design concept of anti-plastic collapse analysis based on elastoplastic analysis is adopted,and a new formula for calculating the thickness of the spherical shell is proposed,which takes into account the influences of material strain hardening and large deformation effects.For non-alloy steels and low-alloy steels,this new formula yields more conservative results than the existing standard method.For austenitic stainless steels,the formula based on the allowable stress gives more conservative results than the existing standard method,while the formula based on the tensile strength can significantly reduce the wall thickness of the spherical shell.关键词
内压球壳/规范标准/弹性失效/塑性失效/塑性垮塌Key words
internally pressurized spherical shells/code and standard/elastic failure/plastic failure/plastic collapse分类
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李克明,沈涛,金泽霖,郭晓,元少昀,马圆圆..内压球壳强度设计方法对比分析[J].压力容器,2024,41(12):32-43,12.基金项目
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