基于Ansys的锚固式储液罐模态分析
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摘要
地震灾害对储液罐的危害巨大,储液罐的抗震研究非常必要。利用Ansys软件建立了锚固式储液罐的有限元计算模型,计算了储液罐的前10阶固有频率,给出了三维主振型图。各阶振型的x向、y向最大应力及主要变形均发生在罐体上沿,说明由于振动产生的罐体破坏容易发生在罐体上沿,因此罐体顶部的抗震加固非常重要,抗震加强圈应靠顶部设置。
Liquid storage tanks are exposed to serious damage in the event of earthquakes.It is very necessary to study seismic resistance of liquid storage tanks.A finite element model of anchored liquid storage tanks was made by software Ansys.The first 10 ranks of inherent frequencies were made out,and three-dimensional main vibratory model figures were drawn out.The maximal stress along x-axis and y-axis and the main displacement were found at the top part of the wall of tanks.The conclusion that the breakage of tank wall easily occurs at the top part of body of tanks can be educed.Therefore,it is very important to reinforce the top part of the tank body,and the strengthen circle should lie near the top of wall.
Liquid storage tanks are exposed to serious damage in the event of earthquakes.It is very necessary to study seismic resistance of liquid storage tanks.A finite element model of anchored liquid storage tanks was made by software Ansys.The first 10 ranks of inherent frequencies were made out,and three-dimensional main vibratory model figures were drawn out.The maximal stress along x-axis and y-axis and the main displacement were found at the top part of the wall of tanks.The conclusion that the breakage of tank wall easily occurs at the top part of body of tanks can be educed.Therefore,it is very important to reinforce the top part of the tank body,and the strengthen circle should lie near the top of wall.
引文
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[2]陈世一,蔡强康.锚固立式圆柱形储液罐抗震研究的回顾与展望(I)[J].抚顺石油学院学报,1996,16(4):38-44.
[3]陈世一,蔡强康.锚固立式圆柱形储液罐抗震研究的回顾与展望(II)[J].抚顺石油学院学报,1997,17(1):31-36.
[4]路明,安晓卫.大型储油罐动力模态分析[J].沈阳工业学院学报,2000,19(3):11-16.
[5]傅志方.振动模态分析与参数识别[M].北京:机械工业出版社,1990.
[6]郭馨艳,曾桂香.大型储罐结构的动力性能分析[J].郑州工业大学学报,1999,20(2):80-82.
[7]孙建刚,郝进锋.采用滚动隔震体系的立式储液罐(敞口)振动的模型试验研究[J].大庆石油学院学报,1998,22(3):101-105.
[8]邓民宪,张永凯.常压立式储油罐地震应力的有限元计算[J].地震学刊,2000,20(3):19-23.
[9]Talaslidis D G,Manolis G D.Risk analysis of industrial struc-ture under extreme transient loads[J].Soil Dynamics andEarthquake Engineering,2004,24(4):435-448.
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