美国和日本超高压容器疲劳设计方法的分析比较

摘要

ASME Boiler and Pressure Vessel Code ,SectionⅧDivision 3,Alternative Rules for Construction of High Pressure Vessels and The High Pressure Gas Safety Institute of Japan KHK ,Standard for Construc-tion of Ultra High Pressure Gas Facilities are widely used in high pressure vessel design .They are similar specifications with differences .It discusses the fatigue design process for pressure vessel design ,compares and analyzes the differences of the fatigue design curves , mean stress correction methods and surface roughness .Such as the application of Abaqus for the fatigue evaluation of a crystal reactor vessel barrel , respectively according to KHK and ASME ,shows that the Best -fit Curve Method of KHK standard ob-tains the maximum allowable lifetime ,followed by method of ASME standard ,the life of KHK Design Fa-tigue Curve Method is minimum .%美国机械工程师协会锅炉压力容器规范第Ⅷ篇第三分篇“高压容器建造另一规则”和日本高压气体安全协会KHK《超高压设备基准》是超高压容器设计中广泛采用的技术标准，两者在压力容器的疲劳设计方法上相似但不相同。论述了两种疲劳设计方法的分析流程；对两个标准的疲劳设计曲线、平均应力修正和表面粗糙度等问题进行比较分析；以某水晶釜筒体为例，应用Abaqus软件分别按照两个标准对其进行疲劳评定。结果表明：KHK标准最佳疲劳曲线方法得到的许用寿命最大、其次是ASME Ⅷ-3标准设计方法、KHK标准设计疲劳曲线方法所得寿命最小。