暴风雪下塔设备可靠性分析
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摘要
利用数理统计方法,分析某地区的月平均风速极大值样本,得到其分布参数,进而确定基本风压的分布参数。根据塔设备实际载荷情况,修正了暴风雪情况下工作载荷的力学模型。在塔设备可靠性分析过程的风力计算中引入动态特性系数,更合理地考虑了暴风雪情况下风、雪载荷的不确定性。得到的应力结果符合极值分布,同时也体现了塔设备在暴风雪下风载荷产生的应力的随机性。综合分析风载荷、地震载荷和偏心载荷所产生轴向应力后,建立了可靠性分析的计算方法并进行了实例分析,其结果可为制订塔设备可靠性设计标准作为参考。
The sample data of maximum mean wind speed per month in some area was analyzed to determine the type of distribution and the distribution parameters of the basic wind pressure with mathematic statistics method.According to the load condition of tower under the wind and ice storm,the mechanical model was modified.Due to the existence of the uncertainty of the wind and ice loads,dynamic response factor was introduced in the process of computing the wind strength during the reliability analysis.The stress result conformed to the extreme value distribution,and it also manifested the randomicity of the stress produced by the wind load of tower under wind and ice storms.Analyzed the axial stress caused by wind load,the earthquake loading and the eccentric load,and then established a reliability analysis computational method and carried this method on the example analysis.The study results may give a reference to the reliability design of tower.
The sample data of maximum mean wind speed per month in some area was analyzed to determine the type of distribution and the distribution parameters of the basic wind pressure with mathematic statistics method.According to the load condition of tower under the wind and ice storm,the mechanical model was modified.Due to the existence of the uncertainty of the wind and ice loads,dynamic response factor was introduced in the process of computing the wind strength during the reliability analysis.The stress result conformed to the extreme value distribution,and it also manifested the randomicity of the stress produced by the wind load of tower under wind and ice storms.Analyzed the axial stress caused by wind load,the earthquake loading and the eccentric load,and then established a reliability analysis computational method and carried this method on the example analysis.The study results may give a reference to the reliability design of tower.
引文
[1]张恩祥,唐黎明,王宗勇,等.等截面塔设备风弯矩的积分求法[J].沈阳化工学院学报,2003,17(1):50-53.
[2]蔡克霞.塔器上所受基本风压分布参数的确定[J].哈尔滨工业大学学报,2003,10(10):1255-1257.
[3]戴树和,王明娥.可靠性工程及其在化工设备中的应用[M].北京:化学工业出版社,1987:31,101-107,116-117.
[4]郑津洋,董其伍,桑芝富.过程装备设计[M].北京:化学工业出版社,2005:327-335.
[5]Antanas Kudzys.Safety of Power Transmission LineStructures under Wind and Ice Storms[J].Journal ofEngineering Structure,2006,28:682-689.
[6]余建星,李长升,寇雄,等.塔式容器结构抗震设计的动力学可靠性研究[J].地震工程与工程振动,1997,17(4):26-33.
[7]GB/T4710—2005,钢制塔式容器[S].
[8]蔡克霞,张莉娟.地震时最大地面水平加速度分布参数的确定方法[J].兰州理工大学学报,2004,2(30):73-75.
[9]田健,张忠宁,李新.自重对均布风载下等截面高塔塔顶挠度的影响[J].设计计算,2006,23(6):20-24.
[10]Bruce R,Paulos Beraki Tekie.Wind Load Statistics forProbability-based Structural Design[J].Journal ofEngineering Structure,1999:452-463.
[11]Sudret B,Defaux G,Pendola M.Time-variant FiniteElement Reliability Analysis-application to the Dura-bility of Cooling Towers[J].Journal of Structural Safe-ty,2005,27:93-112.
[12]Wen-Lih Chen,King-Leung Wong.A Reliable Ana-lytical Method Applied to Heat Transfer Problems Asso-ciated with Insulated Cylindrical Tanks[J].Journal ofEnergy Conversion&Management,2007,48:679-687.
[2]蔡克霞.塔器上所受基本风压分布参数的确定[J].哈尔滨工业大学学报,2003,10(10):1255-1257.
[3]戴树和,王明娥.可靠性工程及其在化工设备中的应用[M].北京:化学工业出版社,1987:31,101-107,116-117.
[4]郑津洋,董其伍,桑芝富.过程装备设计[M].北京:化学工业出版社,2005:327-335.
[5]Antanas Kudzys.Safety of Power Transmission LineStructures under Wind and Ice Storms[J].Journal ofEngineering Structure,2006,28:682-689.
[6]余建星,李长升,寇雄,等.塔式容器结构抗震设计的动力学可靠性研究[J].地震工程与工程振动,1997,17(4):26-33.
[7]GB/T4710—2005,钢制塔式容器[S].
[8]蔡克霞,张莉娟.地震时最大地面水平加速度分布参数的确定方法[J].兰州理工大学学报,2004,2(30):73-75.
[9]田健,张忠宁,李新.自重对均布风载下等截面高塔塔顶挠度的影响[J].设计计算,2006,23(6):20-24.
[10]Bruce R,Paulos Beraki Tekie.Wind Load Statistics forProbability-based Structural Design[J].Journal ofEngineering Structure,1999:452-463.
[11]Sudret B,Defaux G,Pendola M.Time-variant FiniteElement Reliability Analysis-application to the Dura-bility of Cooling Towers[J].Journal of Structural Safe-ty,2005,27:93-112.
[12]Wen-Lih Chen,King-Leung Wong.A Reliable Ana-lytical Method Applied to Heat Transfer Problems Asso-ciated with Insulated Cylindrical Tanks[J].Journal ofEnergy Conversion&Management,2007,48:679-687.
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