压力容器2025，Vol.42Issue(2)：54-61,8.DOI:10.3969/j.issn.1001-4837.2025.02.007
GB/T 4732-2024《压力容器分析设计》中关于"极限、安定和棘轮载荷边界的直接计算法"的讨论和应用
Discussion and application of the direct calculation method for determining limit,shakedown and ratcheting load boundaries in GB/T 4732-2024"Pressure vessels design by analysis"
摘要
Abstract
To predict the load-bearing capacity of pressure vessel structures under complex loading conditions,the newly revised Chinese standard for pressure vessel analysis and design GB/T 4732-2024 introduces a direct calculation method in Appendix C of Part 5 for determining the limit,shakedown,and ratcheting load boundaries of components.Based on the upper and lower bound theorems,this method can effectively address shakedown and ratchet analysis problems under arbitrary geometric structures and combined thermo-mechanical loading conditions.To assist engineering designers in better understanding and applying the new standard,this paper presents an alternative direct calculation method called the stress compensation method and explains its fundamental concept and analysis procedure.Taking the common oblique nozzle in pressure vessels as an example,the results of the stress compensation method are compared with those obtained from incremental elastic-plastic analysis.The results demonstrate that the stress compensation method significantly improves computational efficiency while maintaining accuracy,enabling rapid determination of shakedown and ratchet boundaries under thermo-mechanical loading.The direct calculation method combines efficiency and accuracy,providing an alternative to traditional methods for assessing load-bearing capacity of complex geometries.This advancement holds significant practical importance for promoting progress in pressure vessel design technology and implementation of the standard.关键词
分析设计/直接法/安定边界/棘轮边界/应力补偿法Key words
analysis and design/direct method/shakedown boundary/ratchet boundary/stress compensation method分类
机械工程引用本文复制引用
沈鋆,粟雨平,彭恒,刘应华..GB/T 4732-2024《压力容器分析设计》中关于"极限、安定和棘轮载荷边界的直接计算法"的讨论和应用[J].压力容器,2025,42(2):54-61,8.基金项目
国家自然科学基金青年科学基金项目"高温承压设备安定分析理论与新型数值直接法研究"(12202230) （12202230）
