结构非线性风振的路径积分方法

王仲刚; 程华; 邓洪洲

结构非线性风振的路径积分方法

1.
后勤工程学院建筑工程系,重庆 400041;2.同济大学建工系,上海 200092

基金项目: 国家自然科学基金资助项目(50178052);重庆市自然科学基金资助项目(7422)

详细信息

作者简介:
王仲刚(1965- ),男,江西波阳人,副教授,博士(联系人.Tel/Fax:+86-23-68599336;E-mail:zhonggangwang@sina.com.cn).

中图分类号: TU311.2；O322；O324
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- 文章访问数: 3320
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- 被引次数: 0
出版历程
- 收稿日期: 2003-09-23
- 修回日期: 2005-05-27
- 刊出日期: 2005-10-15

Path Integral Solution of the Nonlinear Dynamic Behavior of Structure Under Wind Excitation

1.
Department of Civil Engineering, Logistical Engineering University, Chongqing 400041, P. R. China;

摘要

摘要: 通过引入相关脉动风速滤波，将结构非线性风振方程转变为Ito随机微分方程的形式；该方程的解过程具有Markov性质．在时域内将状态方程展开，利用其瞬时线性化随机方程的解析解，基于路径积分给出了结构非线性风振响应概率密度的形式解，得到了一种分析结构非线性风振响应的新方法．对桅杆算例的数值分析表明，该方法较线性频域分析方法和非线性时域积分方法具有更好的准确性和有效性．
- 非线性 /
- 动态响应 /
- 风荷载 /
- 路径积分 /
- 白噪声 /
- 联合概率密度
Abstract: A numerical scheme for the nonlinear behavior of structure under wind excitation is investigated. With the white noise filter of turbulent-wind fluctuations, the nonlinear motion equation of structures subjected to wind load was modeled as the Ito's stochastic differential equation. The state vector associated with such a model is a diffusion process. A continuous linearization strategy in the time-domain was adopted. Based on the solution series of its stochastic linearization equations, the formal probabilistic density of the structure response was developed by the path integral technique. It is shown by the numerical example of a guyed mast that compared with the frequency-domain method and the time-domain nonlinear analysis, the proposed approach is highlighted by high accuracy and robustness. The influence of the structure non-linearity on the dynamic reliability assessment is also analyzed in the example.
- nonlinear /
- dynamic response /
- wind load /
- path integral solution /
- white noise /
- joint statistical distribution

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参考文献(15)

[1]	王肇民,王之宏,颜明忠.桅杆结构[M].北京:科学出版社,2000.
[2]	Peil U,Nlle H.On fatigue of guyed masts due to wind load[A].In:Schuller G I,YAO Fen Eds.Structural Safety & Reliability[C].Rotterdam：Balkema,1994,1132—1140.
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文章访问数: 3320
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结构非线性风振的路径积分方法

作者简介:
王仲刚(1965- ),男,江西波阳人,副教授,博士(联系人.Tel/Fax:+86-23-68599336;E-mail:zhonggangwang@sina.com.cn).

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Path Integral Solution of the Nonlinear Dynamic Behavior of Structure Under Wind Excitation

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留言板

结构非线性风振的路径积分方法

作者简介: 王仲刚(1965- ),男,江西波阳人,副教授,博士(联系人.Tel/Fax:+86-23-68599336;E-mail:zhonggangwang@sina.com.cn).

计量

出版历程

Path Integral Solution of the Nonlinear Dynamic Behavior of Structure Under Wind Excitation

计量

出版历程

目录

作者简介:
王仲刚(1965- ),男,江西波阳人,副教授,博士(联系人.Tel/Fax:+86-23-68599336;E-mail:zhonggangwang@sina.com.cn).