| POD法在定日镜风振响应计算中的应用 |
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| 引用本文： | 王莺歌,李正农,李秋胜,宫博.POD法在定日镜风振响应计算中的应用[J].振动与冲击,2008,27(12). |
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| 作者姓名： | 王莺歌 李正农 李秋胜 宫博 |
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| 作者单位： | 1. 湖南大学建筑安全与节能教育部重点实验室,长沙,410082;广东嘉应学院,广东,梅州,514015
2. 湖南大学建筑安全与节能教育部重点实验室,长沙,410082 |
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| 基金项目： | 国家自然科学基金资助
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科技部"863"项目资助
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| 摘 要： | 定日镜结构风振响应中有多个振型参与,利用完全二次型组合法(CQC)可以考虑各振型间的耦合作用,得到精确结果,但计算量很大,因此提出将随机风场本征正交分解(POD)技术运用到定日镜结构响应计算中.首先给出了POD法原理,讨论了如何将POD法与CQC法结合进行结构脉动响应的频域分析;然后利用POD法分解风洞试验中多通道电子式压力扫描阀系统同步采集到的定日镜表面风压时程,分析了其本征向量的分布特点,以及各阶模态的贡献情况;最后计算出定日镜风致位移响应的均方根,并且对比采用不同阶数模态缩减得到均方根响应的误差.结果表明将POD法引入到风振响应分析中可以大大减少计算工作量并且能保证足够的精度.
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| 关 键 词： | 定日镜 本征正交分解法 完全二次型组合法 风致响应 |
APPLICATION OF POD IN CALCULATION OF HELIOSTAT'S DYNAMIC RESPONSE TO WIND INDUCTION |
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| WANG Ying-ge,LI Zheng-nong,LI Qiu-sheng,GONG Bo.APPLICATION OF POD IN CALCULATION OF HELIOSTAT'S DYNAMIC RESPONSE TO WIND INDUCTION[J].Journal of Vibration and Shock,2008,27(12). |
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| Authors: | WANG Ying-ge LI Zheng-nong LI Qiu-sheng GONG Bo |
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| Affiliation: | WANG Ying-ge1,2,LI Zheng-nong1,LI Qiu-sheng1,GONG Bo1(1.Key Laboratory of Building Safety , Energy Efficiency(Hunan University),Ministry of Education,Changsha 410082 China,2.Department of Civil Engineering Jiaying University,Meizhou 514015 China) |
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| Abstract: | There are usually several vibration modes participating in heliostat's response to wind induction.The complete quadratic combination(CQC)method can take the modes' coupling effect into account.The result is precise,however the computation work is heavy.Therefore,the proper orthogonal decomposing(POD)stochastic wind field was proposed to be applied in computation of heliostat's response to wind induction.The principle of POD was introduced,and the frequency range analysis on fluctuating response combining PO... |
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| Keywords: | heliostat proper orthogonal decomposition method complete quadratic combination wind-induced response |
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