| 桥梁气动自激力时域表达式的瞬态与极限特性 |
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| 引用本文： | 张志田,陈政清,李春光.桥梁气动自激力时域表达式的瞬态与极限特性[J].工程力学,2011(2):75-85. |
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| 作者姓名： | 张志田 陈政清 李春光 |
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| 作者单位： | 湖南大学风工程试验研究中心; |
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| 基金项目： | 国家自然科学基金项目(50708036);国家自然科学基金重点项目(50738002) |
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| 摘 要： | 该文详细介绍了有理函数与阶跃函数在桥梁气动自激力时域模拟中的应用.分别对两种表达式的极限特性与瞬态特性进行了分析.理论分析与数值结果表明:阶跃函数的极限特性独立于识别参数而与桥梁断面的准定常风荷载特性相一致,经参数识别后的阶跃函数自激力表达式是准定常风荷载模型与基于颤振导数表达的自激力模型两者的统一.因此,阶跃函数自激...
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| 关 键 词： | 桥梁 自激力 时域 有理函数 阶跃函数 瞬态特性 极限特性 |
LIMITING AND TRANSIENT CHARACTERISTICS OF TIME-DOMAIN EXPRESSIONS FOR BRIDGE SELF-EXCITED AERODYNAMIC FORCES |
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| ZHANG Zhi-tian,CHEN Zheng-qing,LI Chun-guang.LIMITING AND TRANSIENT CHARACTERISTICS OF TIME-DOMAIN EXPRESSIONS FOR BRIDGE SELF-EXCITED AERODYNAMIC FORCES[J].Engineering Mechanics,2011(2):75-85. |
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| Authors: | ZHANG Zhi-tian CHEN Zheng-qing LI Chun-guang |
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| Affiliation: | ZHANG Zhi-tian,CHEN Zheng-qing,LI Chun-guang(Wind Engineering Research Center,Hunan University,Changsha,410082,China) |
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| Abstract: | This paper introduces the application of a rational and indicial function in the time-domain simulation of bridge deck self-excited aerodynamic forces.The limiting and transient characteristics of both expressions are analyzed and compared.Theoretical analysis and numerical results indicate that the limiting characteristics of the indicial function,independent on the identified parameters,are in consistent with the quasi-steady wind-load characteristics.Thus,the indicial-function-expressed self-excited forc... |
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| Keywords: | bridge self-excited force time-domain rational function indicial function transient characteristic limiting characteristic |
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