| 张弦梁结构振动方法索力识别(Ⅱ):实用公式及误差分析 |
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| 引用本文： | 张宇鑫,李国强,赵世峰.张弦梁结构振动方法索力识别(Ⅱ):实用公式及误差分析[J].振动与冲击,2009,28(3):158-160. |
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| 作者姓名： | 张宇鑫 李国强 赵世峰 |
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| 作者单位： | 1.上海师范大学建筑工程学院,上海 201418; 2.同济大学土木学院,上海 200092 |
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| 摘 要： | 基于提出的张弦梁结构下弦拉索频率方程，研究了运用数值迭代求解方法进行索力求解的数值稳定性。 结果表明，基于数值迭代求解方法识别索力精度无法保证。为提高精度及简化计算，通过分析迭代计算得到的反映频率与索力相关关系的曲线，和已有索力识别经验公式的形式特点，进行数值拟合，提出一组索力计算的实用公式。并对方法的误差敏感性、识别精度等进行了讨论。
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| 关 键 词： | 张弦梁结构 振动 索力 识别 误差 |
| 收稿时间： | 2008-7-14 |
| 修稿时间： | 2008-11-7 |
Vibration-based cable tension identification of a beam string structure (Ⅱ):practical formula& error analysis |
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| ZHANG Yu-xin,LIGuo-qiang,ZHAO Shi-feng.Vibration-based cable tension identification of a beam string structure (Ⅱ):practical formula& error analysis[J].Journal of Vibration and Shock,2009,28(3):158-160. |
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| Authors: | ZHANG Yu-xin LIGuo-qiang ZHAO Shi-feng |
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| Affiliation: | 1. School ofArchitectural and CivilEng., ShanghaiNormalUniversity, Shanghai 201418, China;2. School ofCivilEng.,TongjiUniversity, Shanghai 200092, China |
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| Abstract: | Based on the frequency equation of the lower-chord cable of a beam string structure, the numerical sta-bility for cable tension estimationwas investigated using a numerical iterative solutionmethod. The results illustrates thatthe solution precision could be guaranteed when using the proposed numerical iterative solution method. In order to im-prove and simplify the solution, the relationship between frequency and cable tensionwas studied by conducting numericaliterative computation. Furthermore, the formatof the existing formula for cable tension identificationwas investigated, andone setof practical formula for cable tension identification were proposed by employing numerical fittingmethod. Errorsensitivity and identification precision of themethodwere discussed in the end. |
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| Keywords: | beam string structure(BSS) vibration cable tension identification error sensitivity |
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