M.Shinozuka方法在风荷载模拟中的应用
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摘要
通过分析现有的风荷载数值模拟方法,认为M.Shinozuka方法得到的脉动风荷载样本的统计特征值能较好的符合理论值。系统阐述了这种方法的分析过程,其中涉及到脉动风压规格化功率谱的推导以及脉动风荷载功率谱的计算。采用MATLAB可以方便有效的进行编程,其中的矩阵函数能够容易的实现Cholesky分解以及随机数的求取等。
The sample’s statistical characteristics of impulsive wind load can well accord with the theoretical value by M.Shinozuka method,through analyzing the existing numerical simulation methods of wind load.Relating to the deduction of wind pressure uniform spectrum and calculation of wind load spectrum,analytical progress of M.Shinozuka method is systemically discussed.The program can be realized by MATLAB conveniently and effectively,in which Cholesky decomposition and random numbers can be easily acquired.
The sample’s statistical characteristics of impulsive wind load can well accord with the theoretical value by M.Shinozuka method,through analyzing the existing numerical simulation methods of wind load.Relating to the deduction of wind pressure uniform spectrum and calculation of wind load spectrum,analytical progress of M.Shinozuka method is systemically discussed.The program can be realized by MATLAB conveniently and effectively,in which Cholesky decomposition and random numbers can be easily acquired.
引文
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[5]M.Shinozuka,G.Deodatis.Simulation of stochastic process by spectral representation[J].Applied Mechanics Review,1994,44:191-203.
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[12]张志涌.精通MATLAB6.5版[M].北京:北京航空航天大学出版社,2005.
[2]J.S.Owen,et al.The application of auto-regressive time series modeling for the time-frequency analysis of civil engineering structures[J].Engineering Structures,2001,23:521-536.
[3]G.Deodatis.Simulation of ergodic multivariate stochastic process[J].Journal of Engineering Mechanics,ASCE,1996,122(8):778-787.
[4]李永乐,周述华,强士中.大跨度斜拉桥三维脉动风荷载模拟[J].土木工程学报,2003,36(10):60-65.
[5]M.Shinozuka,G.Deodatis.Simulation of stochastic process by spectral representation[J].Applied Mechanics Review,1994,44:191-203.
[6]星谷胜.随机振动分析[M].北京:地震出版社,1977.
[7]张志强,李爱群,蔡丹绎,等.合肥电视塔的人造脉动风荷载的的仿真计算[J].东南大学学报,2001,31(1):69-73.
[8]E.Simiu,R.H.Scanlan.风对结构的作用-风工程导论[M].刘尚培,等译,上海:同济大学出版社,1992.
[9]E.Simiu.Wind spectra and danamic along wind response[J].J.Struct.Div.,1974,100(9):1897-1910.
[10]张相庭.结构风压与风振计算[M].上海:同济大学出版社,1985.
[11]王富生.巨-子型框架减振结构体系风振主动、混合控制仿真分析[D].西安:西北工业大学硕士学位论文,2005.
[12]张志涌.精通MATLAB6.5版[M].北京:北京航空航天大学出版社,2005.
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