摘要
为了探求大型拱顶储罐的合理设计方法， 在本文中给出了一个直径为２．５ｍ 的模型罐在内压及拱顶雪载作用下的弹性应力测试与内压弹性失稳的实验结果。罐的拱顶为加肋球壳， 承压圈为圆环壳， 肋与壳之间为间断焊接。文中给出了计及加强肋与不计及加强肋两种不同的有限元计算方案 （分别简称有肋与无肋方案） 所得数值解与实测值的比较。结果表明： 对于肋与壳间断焊的情况在内压作用下， 应力测试实验值与弹性内压失稳临界压力和按无肋方案计算值相一致；在拱顶雪载作用下， 应力测试值与按有肋方案计算值一致。实验还表明对于大型拱顶储罐，采用圆环壳型的承压圈有较好的承载能力， 这是一种合理的结构型式。
In order to investigate a design method of large scale storage tanks with fixed roofs,the measured elastic stresses and buckling due to internal pressure on a model with diameter of 2 5meter are presented in this paper.The roof of the model is a spherical shell with stitch welded ribs and compression ring is a toroidal shell.The model is subjected to two kinds of loads:internal pressure and snow loading on the roof.The tested results are compared with the numerical results by two kinds of finite element methods:shell elements with and without beam elements.The results show that for internal loading case,the tested results are in better agreement with the calculated results by shell elements without beam than with beam,but for snow loading case the agreement is invert.The results show that the toroidal shell is a good type of compression ring for large scale storage tanks as well.
出处
《压力容器》
1999年第6期30-34,50,共6页
Pressure Vessel Technology
