薄壁压力容器开孔补强的设计计算与可靠性分析  

The Opening Reinforcement of Thin-wall Pressure Vessel's Designing Calculation and Reliability Analysis

作　　者：林玉娟[1] 李继伟[1] 江雪[1] 

机构地区：[1]东北石油大学机械科学与工程学院,大庆163318

出　　处：《科学技术与工程》2010年第36期9082-9085,共4页Science Technology and Engineering

摘　　要：在薄壁压力容器器壁上开孔,不但削弱了容器的材料强度,而且导致容器局部应力集中,成为容器破坏的重要因素之一。国标设计中考虑容器开孔补强的安全性尽管有了一系列规定,但对影响安全诸因素的随机性考虑较少,而可靠性设计把影响安全的参数作为随机变量,依据概率统计把安全性与经济性统一进行设计计算。通过实例计算与分析对比表明,可靠性设计在保证可控的故障概率下,容器的成本投资相对常规设计计算得到了进一步优化,符合工程实际的现实要求。If the thin-wall pressure vessel is holed,it not only weakens material＇s strength of vessel,but also causes local stress concentration.That becomes one of important factors of destroyed vessels.Despite there are a series of regulations when the safety of vessel is considered in GB design,but the influence of the safe factors＇ randomness is considered less.Yet reliability design takes the influence of the safe parameters as random variables and unifies the safety and economic to design and calculate according to probability and statistics.It indicates that reliability design makes the failure probability under control and the cost investment of the vessel has been further optimization compared with routine design calculation through the example＇s calculation and analysis.It is in keeping with the requirements of engineering practice.

关 键 词：压力容器 开孔补强 可靠性 设计计算 

分 类 号：TH49[机械工程—机械制造及自动化]