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总结了目前国内常用的埋地储罐强度和稳定性设计方法,针对具体埋地储罐案例,进行了壁厚计算、稳定性校核和加强圈设置及尺寸确定。为验证理论设计的可靠性并准确掌握埋地储罐的变形及应力分布规律,借助ANSYS软件建立储罐及周围填土模型并导入FLAC3D,利用FLAC3D进行数值模拟;对比分析理论设计与数值模拟结果,得出结论:储罐理论设计是安全可靠的;设计过于保守,钢材强度利用率非常低;不设置加强圈的罐壁本身可满足稳定性要求,稳定性设计方法及公式偏于保守;无加强圈储罐,其封头强度及刚度均大于圆筒,应力和变形大小从两端封头到罐体中部递增,且二者在储罐整体上分布不均匀;有加强圈储罐,其应力及变形分布均较均匀,整体受力性能较好。(图7,参16)
The design methods of strength and stability of buried tanks commonly used in our country are summarized. According to the case of specific buried tanks, wall thickness calculation, stability check and strengthening ring setting and dimension determination are carried out. In order to verify the reliability of the theoretical design and to accurately understand the deformation and stress distribution of buried tanks, ANSYS software was used to build the tank and surrounding fill models and imported into FLAC3D. FLAC3D was used for numerical simulation. The theoretical analysis and numerical simulation results were compared , The conclusion is drawn that the theoretical design of the storage tank is safe and reliable; the design is too conservative and the utilization rate of the steel strength is very low; the tank wall without the reinforcing ring itself can meet the stability requirements; the stability design method and formula are conservative; Reinforced ring storage tank, the head strength and stiffness are greater than the cylinder, the size of the stress and deformation increases from the two ends of the head to the middle of the tank, and the two in the tank as a whole is unevenly distributed; The stress and deformation distribution are more uniform, the overall stress performance is better. (Figure 7, reference 16)