摘要
作为一种压力容器分析设计方法,应力分类法在工程应用中存在设计结果与结构失效状态偏离,且对少数结构其设计结果偏不安全这样的问题。依据多年的研究工作,欧盟压力容器标准EN 13445与美国锅炉压力容器规范ASMEⅧ-2分别给出了两个基于弹塑性分析的分析设计方法——直接法和弹-塑性方法。这两种方法都是考虑和利用材料的塑性变形,通过得到结构中更精确的应力应变分布以及指定更符合结构失效状态的判定准则,使得压力容器的设计更具安全性和经济性。文中对这两个方法在标准中的应用作了介绍,并对这两个方法的特点进行了分析。
As an analytical design method used for pressure vessel, the result of stress categorization method often deviates from the failure state of pressure parts, and in a less times, the results of this method are non-conservative. Based on the research work for many years, two analytical design methods by using elastoplastic analysis-direct route and elastic-plastic analysis method have been presented in EU pressure vessel design standard EN 13445 and ASME Boiler and Pressure Vessel Code Ⅷ-2. In these two methods, the plastic deformation of materials are accounted for and utilized. By obtaining more precise distributions of the stresses and the strains in structures and stipulating more appropriate criterion for failure occurred in these structures, the results of pressure vessel design are safer and more economical. In this paper, the application of these two methods in the standard and the code were introduced, and the characteristics of the methods were analyzed.
出处
《化工设备与管道》
CAS
2011年第1期1-8,共8页
Process Equipment & Piping
关键词
分析设计方法
直接法
弹-塑性分析方法
应力分类法
失效模式
强度准则
analytical design method
direct route
elastic-plastic analysis method
stress categorization method
failure mode
criterion
