基于可靠性研究的内压薄壁容器两个重要系数

Two Important Factors of Internal Pressure Thin-Walled Vessel Based on Reliability Research

应用应力-强度干涉模型,建立了确定钢制内压薄壁容器安全系数与试验压力系数的方法;根据钢制内压薄壁容器静强度在不同操作时的最小许用可靠度系数,研究了其安全系数与试验压力系数的关系。研究表明:①屈服与抗拉安全系数应分别不小于1.45与1.70;②试验压力系数在气压试验与液压试验时应分别不大于1.10与1.25。

The stress- strength interference model is applied to dctcnnine safety factor and test pressure coefficient of internal pressure steel thin- wall vessel. According to the internal pressure vessel static strength minimum allowable reliability coefficient in different operations, the relationship of safety factor and the test pressure coefficient is analyzed. The research shows that：①yield and tensile safety factor should not be less than 1.45 and 1.70 respectively; ②during pneumatic testing and hydraulic test, the test pressure coefficient should be no greater than 1.10 and 1.25 respectively.