评定含局部减薄缺陷圆柱壳的新公式及其应用  

The New Evaluation Formulas and Applications for Cylinder Shells with Local Thin Area

作　　者：李思源[1] 李祚成[2] 许燕[2] 俞昶聿 

机构地区：[1]兰州石油机械研究所,甘肃兰州730050 [2]甘肃蓝科石化高新装备股份有限公司,甘肃兰州730070 [3]青海油田花土沟采油一厂,青海海西州816400

出　　处：《压力容器》2013年第2期41-47,14,共8页Pressure Vessel Technology

摘　　要：应用实验数据,选用能自动识别区域的简单函数,分区域拟合含缺陷圆柱壳的鼓胀系数Ml,建立了计算含矩形缺陷圆柱壳剩余强度系数(RSF)的新公式,其计算精度高于或相当于API 579 1级评定和BS 7910中相应的计算公式;采用鼓胀系数Ml,给出了2级评定相应的计算公式;应用20段评定法分别建立了轴向含三角形、椭圆形和圆弧形凹坑圆柱壳的剩余强度系数计算公式,计算了含三角形和椭圆形凹坑圆柱壳的RSFl值,并用表格列出了能直接用于工程评定的RSFl值。The bulge factor Ml of cylinder shells with defects is fitted regionally by using experimental data and simply functions which can automatically recognize regions. A new remaining strength factor （RSF） calculation formula is established for cylinder shells with rectangular defects. The accuracy of the calculat- ed results is higher or equals to the corresponding result in Level 1 assessment of API 579 and in BS 7910. The corresponding formula for Level 2 assessment is provided using bulge factor Mt. RSF formulas for cylinder shell with axial triangle, elliptical, and circle pit are established respectively by using the 20 - section evaluation method. RSFIs for cylinder shell with triangle and elliptical pit are calculated. RSFl s that can be used directly in engineering are presented in charts.

关 键 词：圆柱壳 局部减薄缺陷 鼓胀系数 剩余强度系数 计算公式 评定方法 应用 

分 类 号：TH702[机械工程—仪器科学与技术] TQ055.8[机械工程—精密仪器及机械]