基于允许可靠度的薄壁圆筒静强度安全系数  

Safety Factor of Thin-walled Cylindrical Static Strength Based on Allowable Reliability

作　　者：刘岑[1] 付林 吴森林[1] 林晖[1] 洪凯[1] 李鑫志 Liu Cen;Fu Lin;Wu Senglin;Lin Hui;Hong Kai;Li Xinzhi(Hubei Light Industry Technology Institute,Wuhan 430070,Hubei;Ezhou Vocational University,Ezhou 436000,Hubei)

机构地区：[1]湖北轻工职业技术学院,湖北武汉430070 [2]鄂州职业大学,湖北鄂州436000

出　　处：《武汉工程职业技术学院学报》2024年第3期17-20,31,共5页Journal of Wuhan Engineering Institute

基　　金：湖北省教育厅科研项目(B2022557)。

摘　　要：为建立钢制单层承压薄壁圆筒静强度的可靠性设计技术,当圆筒静强度与载荷分别符合正态分布且静强度分布参数为区间值时,应用概率论知识,构建了圆筒静强度在不同工况的可靠度系数、安全系数和工况系数三者之间的关系。研究表明:1)在一般气压试验或气液组合试验时,圆筒屈服强度的允许可靠度系数应不小于1.549且不超过2.115,爆破强度的允许可靠度系数应不小于4.081且不超过5.414。2)在一般液压试验时,圆筒屈服强度的允许可靠度系数应不小于0.605且不超过1.005,爆破强度的允许可靠度系数应不小于3.304且不超过4.430。3)在正常操作时,圆筒屈服强度的允许可靠度系数应不小于1.961且不超过2.484,爆破强度的允许可靠度系数应不小于4.280且不超过5.456。4)在允许可靠度系数满足上述取值范围,且工况系数符合中国标准时,圆筒屈服安全系数可取1.40,爆破安全系数可取2.00。To establish the reliability design technology of static strength of steel single-layer pressure thin-wall cylinder,the relations between the reliability coefficient,safety coefficient and working condition coefficient of cylinder static strength in different working conditions are constructed based on probability theory when the cylinder static strength and load conform to the normal distribution and the distribution parameters were interval values.Research indicates that:1)In the pressure or gas-liquid combination pressure test,the allowable reliability coefficient of cylinder yield pressure should be not less than 1.232 and not more than 1.715,and the allowable reliability coefficient of burst pressure should be no less than 3.821 and not more than 5.084.2)In the hydraulic test,the allowable reliability coefficient of the cylinder yield pressure should be not less than 0.605 and not more than 1.005,and the allowable reliability coefficient of the burst pressure should be not less than 3.304 and not more than 4.430.3)In normal operation,the allowable reliability coefficient of cylinder yield pressure should be not less than 1.961 and not more than 2.484,and the allowable reliability coefficient of burst pressure should be not less than 4.280 and not more than 5.456.4)When the allowable reliability coefficient meets the above value range and the working condition coefficient conform to the Chinese standard,the cylinder yield safety factor should be equal to 1.40 and the burst safety factor should be equal to 2.00.

关 键 词：圆筒 静强度 可靠度系数 安全系数 工况系数 

分 类 号：TQ051.3[化学工程] TH49[机械工程—机械制造及自动化]