摘要
厚壁圆筒在内压力作用下处于三向应力（ 轴向应力、环向应力和径向应力） 状态， 按不同的失效准则和强度条件有不同的设计公式。ＧＢ１５０ —１９９８《钢制压力容器》采用的是弹性失效准则， 规定对设计压力ｐ≤０－４［σ］ｔ且不超过３５ＭＰａ 的压力容器按中径公式进行设计。通过对弹性失效准则下４ 种强度理论、中径公式及厚壁圆筒实测值的比较和实例验证， 表明用中径公式设计的高合金钢厚壁圆筒， 在水压试验时其内壁的应力有时超过材料的屈服极限， 使容器出现屈服现象。由此提出按弹性失效准则将中径公式应用于厚壁圆筒设计的条件为设计压力ｐ≤０－３５４［σ］ｔ且不超过３５ＭＰａ。
There are three stresses on the thick walled cylinder under inner pressure, i.e. axial stress, circumferential stress and radial stress. There are different design equations corresponding to various failure criteria and strength conditions. Elastic failure criterion is adopted in GB150—1998, which stipulats that the middle radius equation is useful for pressure vessel design if the design pressure is no more than 0 4[σ] t or 35MPa. A thick walled cylinder is designed according to the elastic failure criterion by using the middle radius equation, and tested with water under a certain pressure, the result shows that the stress on the inwall of the cylinder is more than the yield limit of the material, resulting in yielding of the vessel. Therefore it is indicated that the condition of applying the middle radius equation on thick walled cylinder design is design pressure being no more than 0 354[σ] t or 35MPa.
出处
《石油机械》
北大核心
1999年第6期46-49,45,共5页
China Petroleum Machinery
关键词
厚壁容器
强度
计算公式
压力容器
油罐
thick walled vessel strength equation failure criterion condition
