钢制压力容器分析设计中应力的分类及比较

Classification and Comparison of Stress in Steel Pressure Vessels-Design by Analysis

钢制压力容器的分析设计中,依据JB4732-95《钢制压力容器——分析设计标准》,按"等安全裕度原则"应力分为三类:一次应力、二次应力、峰值应力。一次应力没有自限性,必须满足外载和静力平衡关系,按沿厚度分布情况又分为一次薄膜应力与一次弯曲应力;二次应力具有自限性,由同一元件上不同部位材料或相邻元件间的总变形协调条件导得;峰值应力的明显特点是局部性和自限性,是局部结构不连续处总应力去除一次应力和二次应力后的剩余应力。

According to JB4732-95 Steel Pressure Vessels-design by analysis,Design stress is divided into three categories：primary stress,secondary stress,peak stress.Primary stress is not self-limiting;secondary stress self-limiting;peak stress was marked by a localized and self-limiting.