LNG储罐外罐壁在冲击荷载作用下的受力分析
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摘要
采用有限元方法,分析LNG(液化天然气)储罐外壁在冲击荷载作用下的动力性能和储罐的破坏情况.利用有限元模拟1m3的质量块,以50,60,70m/s速度撞击储罐的不同位置,求解并对比相应的应力云图.结果表明:当单位体积质量块以70m/s的速度撞击储罐外壁上部时,对储罐的破坏力最大,外表面混凝土破坏,但内表面混凝土安全.因此,LNG储罐能够承受单位体积质量块以70m/s的速度撞击储罐外壁.
Using the finite element method to research and analyze the dynamic performance and the damage of the outer wall of LNG tanks under impact loading. Using the 1 m3 quality pieces to bump different sections of the tank by the speed of 50 m/s, 60 m/s, 70 m/s and we got the corresponding stress figures, then compared and analyzed the stress figures, when the mass hit the head of outer wall at 70m/s, the damage is greatest, at this time, the outside concrete break but the inside concrete is still safe. So we can arrive at the conclusion that LNG can support the unit volume mass hitting the outer wall of the tank by the speed of 70m/s.
Using the finite element method to research and analyze the dynamic performance and the damage of the outer wall of LNG tanks under impact loading. Using the 1 m3 quality pieces to bump different sections of the tank by the speed of 50 m/s, 60 m/s, 70 m/s and we got the corresponding stress figures, then compared and analyzed the stress figures, when the mass hit the head of outer wall at 70m/s, the damage is greatest, at this time, the outside concrete break but the inside concrete is still safe. So we can arrive at the conclusion that LNG can support the unit volume mass hitting the outer wall of the tank by the speed of 70m/s.
引文
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[2]骆晓玲,齐长勇,程换新.大型液化天然气储罐的发展研究[J].机械设计与制造,2009(9):255-257.
[3]李建军.LNG储罐的建造技术[J].焊接技术,2006,35(4):68-79.
[4]董鲁生,章树民.日本LPG、LNG储罐的设计[J].油气储运,1996,15(5):89-102.
[5]Kumar S.Design and construction of above ground tanks[J].Hydrocarbon Asia,2001,11(5):50-54.
[6]张云峰,许丽佳,李宁,等.LNG储罐混凝土外罐竖向预应力筋张拉顺序研究[J].大庆石油学院学报,2011,35(6):85-89.
[7]谭双林.单层球面网壳在冲击荷载下的动力响应与失效模式研究[D].哈尔滨:哈尔滨工业大学,2009.
[8]曹德青.钢筋混凝土侵彻数值模拟研究[D].北京:北京理工大学,2000.
[9]Sliter G E.Assessment of empirical concrete impact formulas[J].ASCE,Journal of the structure division,1980,10(5):26-29.
[10]Agardh L.3DFE-simulation of high-velocity fragment perforation of reinforced concrete slabs[J].Int.J.Impact-engineering,1997,123(1):86-94.
[11]Wei Wang,Cheng T,Thomas H.Limit analysis of reinforced concrete beams subjected to pure torsion[J].Journal of structural en-gineering,1997,123(1):86-94.
[12]Kaplan F,Wilson S.ANSYS programmer’s manual[J].ANSYS Inc.Nostrand Reinhold Co.New York,1998,45(2):165-167.
[13]张云峰,袁朝庆,孙建刚.储罐三维地震响应分析[J].大庆石油学院学报,2003,27(4):71-74.
[14]张云峰,王伟玲.大型LNG预应力储罐罐壁厚度取值探讨[J].油气田地面工程,2008,27(12):29.
[15]Dliger W H.Ductility of plain and confined concrete under different strain rates[J].Joumal Proceeding,1984,81(11):16-18.
[16]张云峰,田晓雪,郭迎利,等.夹层橡胶垫隔震液化天然气储罐地震响应分析[J].科学技术与工程,2010,10(25):6318-6321.
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