摘要
随着低温液化气体的日益广泛应用,深冷容器的需求量不断增加。在保证安全的前提下,实现深冷容器的轻量化,对于降低制造成本具有重要意义。采用室温应变强化技术可以提高奥氏体不锈钢的屈服强度,显著减薄奥氏体不锈钢制深冷容器的壁厚,减轻重量。试验测定了304不锈钢应变强化效应,并采用常规设计、分析设计和极限分析三种不同的方法,对相同设计参数的304不锈钢制低温储罐内筒进行强度设计,发现应变强化后材料的屈服强度显著提高。若考虑应变强化,按常规设计内筒柱壳厚度可降低50%,按分析设计可降低45%,而按极限分析,承载能力可提高139%。
As the widespread application of cryogenic liquefied gas, more and more cryogenic vessels are needed. Light - weight design of cryogenic vessels is significant in lowing manufacture cost on the premise of safety. Yield strength of austenitic stainless steel can be enhanced aftrer cold stretching so that the wall thickness and weight of the austenitic stainless steel cryogenic vessels can be reduced. Strain - strengthening experiments of 304 austenitic stainless steel were carried out to measure the strain - strengthening effects. Strength design of a cryogenic storage tank was achieved with three different meth- ods：namely design - by - rules, design - by - analysis and limit analysis. It is founded that the yield strength is remarkably increased after strain - strengthening. If using the strain - strengthened austenitic stainless steel, the thickness of inner cylinder could be reduced by 50% and 45% according to design - by -rules and design - by - analysis methods respectively. Furthermore, based on limit analysis, the load bearing capacity of the vessel could be increased by 139%.
出处
《压力容器》
北大核心
2011年第11期25-28,共4页
Pressure Vessel Technology
基金
国家高技术研究发展计划子课题资助(2009AA044802-01)
关键词
应变强化
轻量化设计
常规设计
分析设计
极限分析
strain - strengthening
light - weight design
design - by - rules
design - by - analysis
limit analysis
