钢制薄壁内压容器的压力试验超压限制系数  

OVERPRESSURE CONFINING COEFFICIENT OF STEEL THINNESS WALL PRESSURE VESSELS UNDER PRESSURE TEST

作　　者：刘小宁[1,2] 张红卫[2] 韩春鸣[2] 叶四合[2] 

机构地区：[1]武汉软件工程职业学院环境与生化工程系,武汉430205 [2]武汉软件工程职业学院机械制造工程系,武汉430205

出　　处：《机械强度》2010年第4期596-599,共4页Journal of Mechanical Strength

基　　金：湖北省教育厅科研项目(B20087301);武汉市教育局重点科研项目(2008K027);武汉市创新人才开发资金重大创新专项资助项目~~

摘　　要：基于钢制薄壁内压容器模糊静强度可靠度的信息熵分析,对其在最苛刻压力试验时的超压限制系数进行研究,导出该系数的理论计算公式。如果要求钢制薄壁内压容器屈服强度的模糊可靠度在最苛刻气压与液压试验时分别为0.97260与0.7925,爆破强度的模糊可靠度在最苛刻气压与液压试验时分别为0.99999999140与0.999990226;则研究表明:(1)钢制薄壁内压圆筒在气压与液压试验时的超压限制系数在屈服失效准则下应分别不大于0.800与0.900,在爆破失效准则下应分别不大于0.640与0.719。(2)钢制薄壁内压球壳在气压与液压试验时的超压限制系数在屈服失效准则下应分别不大于0.848与0.943,在爆破失效准则下应分别不大于0.581与0.680。(3)扁平绕带容器在气压与液压试验时的超压限制系数在屈服失效准则下应分别不大于0.858与0.971,在爆破失效准则下应分别不大于0.538与0.658。The overpressure confining coefficient of steel thinness wall internal pressure vessels under most severe condition of pressure test was quantitatively analyzed based on the information entropy theory. For the steel thinness wall internal pressure vessels, when the fuzzy yield strength reliability is equal to 0. 972 60 or 0. 792 5 under barometrical or hydraulic pressure tests, and the fuzzy burst strength rehability is equal to 0.999 999 991 40 or 0.999 990 226 under barometrical or hydraulic pressure tests, respectively. The research concluded that： （1）For the cylinder vessels, if using yield failure criteria, the overpressure confining coefficient should not be greater than 0. 800 or 0. 900 under barometrical and hydraulic pressure tests; using bursting failure criteria, it should not be greater than 0. 640 or 0. 719 under barometrical and hydraulic pressure tests. （2）For the spherical vessels, if using yield failure criteria, the overpres- sure confining coefficient should not be greater than 0. 848 or 0. 943 under barometrical or hydraulic pressure tests; if using bursting failure criteria, it should not be greater than 0. 581 or 0. 680 under barometrical or hydraulic pressure tests. （3）For the flat ribbon-wound pressure vessels, if using yield failure criteria, the oveIpressure confining coefficient should not be greater than 0. 858 or 0. 971 under barometrical or hydraulic pressure tests; if using bursting failure criteria, it should not be greater than 0. 538 or 0. 658 under barometrical or hydraulic pressure tests, respectively.

关 键 词：薄壁内压容器 模糊静强度可靠度 压力试验 超压限制系数 信息熵 

分 类 号：TH49[机械工程—机械制造及自动化] TQ051[化学工程]