摘要
采用应变强化技术可使真空绝热容器壁厚减薄,实现轻量化设计。但是筒体壁厚减薄会导致结构不连续区处应力增加。为准确分析应变强化型容器在各种工况下的应力应变,以奥氏体不锈钢移动式真空绝热容器为研究对象,采用非线性有限元方法对容器的应变强化过程进行研究;并在此基础上,考虑实际运输过程中遭遇的颠簸、制动、急速转弯等工况下的惯性力载荷,研究容器的应力应变分布情况。结果表明:应变强化过程中变形鼓胀主要发生在远离结构不连续区的圆滑过渡筒节部位,八点支撑区域的变形很小。运输过程中,惯性力载荷对容器应力强度的影响不大,应力应变分布情况与静态工况下的相似,最大Mises等效应力均出现在内容器固定端下支撑处的加强圈上。
Using strain-strengthening technology can lead to wall thickness and weight of vacuum insulated vessel reduction. The stress on the discontinuous zone increases due to wall thickness thinning. In order to make a correct analysis of stress and strain of vessel under various conditions, the strain-strengthening process of vessel was studied by using nonlinear finite element method, with austenitic stainless steel transportable vacuum insulated vessel as the research object. On that basis, the stress-strain distribution of vessel was further researched, considering inertia force under the condition of turbulence, braking and turning sharply in the actual transport process. The results show that the deformation in the strain-hardening process mainly occurs in the smooth transition of shell away from discontinuous area and the deformation of the eight point support area is small. In the actual transport process, the inertia force had a minimal effect on stress intensity and the stress-strain distribution was similar to that of static condition. Simultaneously, the maximum Mises equivalent stress was located in reinforcing ring which was near the fixed end support in the inner vessel.
出处
《化学工程》
CAS
CSCD
北大核心
2016年第9期70-74,共5页
Chemical Engineering(China)
基金
中央高校基本科研业务费专项资金资助项目(222201313014)
关键词
应变强化
真空绝热容器
应力应变分布
非线性数值模拟
strain strengthening
vacuum insulated vessel
stress-strain distribution
nonlinear numerical simulation
