摘要
罐顶失稳是拱顶罐失效的主要因素之一。采用ANSYS软件中的APDL语言对带几何缺陷罐顶的稳定性进行了有限元分析,获得了罐顶的临界失稳载荷,同时在内压作用下对其进行了应力应变分析。通过研究罐顶不同结构尺寸对其承载外载荷能力的影响发现,筋板高度和筋板厚度对加筋球壳承载外载荷能力的影响较为显著;当筋板的高厚比大于35时,罐顶的临界外压力显著下降。模拟结果可为拱顶罐的设计、安全使用以及现场修复提供一定的理论依据。
The instability of tank top was one of the main factors affecting the failure of dome roof tank. The stability of tank roof with geometric imperfections was analyzed by APDL language in ANSYS software, and the critical collapsing load of tank roof was obtained. At the same time, stress and strain analysis was carried out under internal pressure. By studying the influence of different structural dimensions of tank roof on its bearing capacity, it was found that the height and thickness of the stiffened plate had significant influence on the external load capacity of the stiffened spherical shell. When the ratio of height to thickness of stiffened plate was greater than 35, the critical external pressure of tank roof decreased significantly. The simulation results could provide some theoretical basis for the design, safe use and on-site repair of dome roof tank.
出处
《化工装备技术》
CAS
2017年第6期28-32,共5页
Chemical Equipment Technology
关键词
球壳
几何缺陷
拱顶罐
稳定性
临界载荷
有限元分析
压力容器
Spherical shell
Geometric imperfection
Dome roof tank
Stability
Critical load
Finite element analysis
Pressure vessel
