Inversion algorithm for the whole prototype dynamic displacement field of a high arch dam based on limited measuring points
Inversion algorithm for the whole prototype dynamic displacement field of a high arch dam based on limited measuring points
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基于有限测点的高拱坝全原型动位移场反演算法
DOI：
10.1177/1077546316630078
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发表时间：
2017-12
影响因子：
2.8
通讯作者：
魏博文
中科院分区：
文献类型：
--
作者：
李火坤;王玉洁;魏博文
拱坝在泄洪期间的动位移响应的均方差是评价坝体振动强度的重要指标。动位移响应的MSD的整体分布反映了整个动位移场。基于有限测点的拱坝整体动位移场反演具有重要意义。本文以二滩拱坝为例，提出了一种原型拱坝整体动位移场的反演算法。首先，介绍了拱坝流激振动响应的反演理论。其次，进行泄洪激励下的拱坝原型振动试验，确定有限测点的动位移响应。第三，建立了二滩拱坝的足尺有限元模型，进行了模态分析，截断了前九阶振型，提取了用于等效激励源载荷谱反演的振型参数。最后，基于等效激励载荷谱，对拱坝进行流激振动响应正分析，计算出整个拱坝的动位移场。反演结果表明，只需在坝顶布置7个动位移响应测点，即可得到整个拱坝的动位移场。同时，反演结果与实测值吻合较好。该方法为高拱坝泄洪期合理评价提供了一种新的技术手段。
The mean square deviation (MSD) of an arch dam dynamic displacement response during a flood discharge period is an important indicator used to evaluate the vibration intensity. The whole distribution of the MSD of the dynamic displacement response reflects the whole dynamic displacement field. Inversion of the whole dynamic displacement field of the arch dam based on limited measuring points is of significance. In this study, the Ertan arch dam was used to propose an inversion algorithm for the whole prototype dynamic displacement field of the arch dam. First, inversion theory of flow-induced vibration response for the arch dam is introduced. Second, the arch dam prototype vibration test under flood discharge excitation is conducted to determine the dynamic displacement response of limited measuring points. Third, the full-scale finite element model of the Ertan arch dam is set up to conduct modal analysis, and the first nine modes are cutoff to extract the modal parameters for the inversion of equivalent excitation source load spectra. Finally, the whole dynamic displacement field of the arch dam is calculated by flow-induced vibration response positive analysis based on the equivalent excitation load spectra. Inversion results show that the whole arch dam dynamic displacement field is obtained through only seven dynamic displacement response measuring points arranged on the crest of the dam. Simultaneously, the inversion and measured values are in good agreement. This method provides a novel technique to reasonably evaluate the high arch dam during the flood discharge period.
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DOI：
--
发表时间：
2008
期刊：
Journal of Tianjin University
影响因子：
--
作者：
Zhang Jian-wei
通讯作者：
Zhang Jian-wei
影响因子：
4.5
作者：
G. Darbre;J. Proulx
通讯作者：
G. Darbre;J. Proulx
DOI：
10.1002/(sici)1096-9845(200005)29:5
发表时间：
2000-05
影响因子：
4.5
作者：
N. Kurata;T. Kobori;Motoichi Takahashi;T. Ishibashi;N. Niwa;J. Tagami;H. Midorikawa
通讯作者：
N. Kurata;T. Kobori;Motoichi Takahashi;T. Ishibashi;N. Niwa;J. Tagami;H. Midorikawa
影响因子：
2.8
作者：
B. Sevim;A. Bayraktar;A. Altunışık
通讯作者：
B. Sevim;A. Bayraktar;A. Altunışık
影响因子：
2.6
作者：
C. Loh;Tsu-Chiu Wu
通讯作者：
C. Loh;Tsu-Chiu Wu