| 拉索非线性振动参数敏感性分析及其频率区间估计 |
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| 引用本文： | 卜一之,张清华.拉索非线性振动参数敏感性分析及其频率区间估计[J].桥梁建设,2011(6). |
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| 作者姓名： | 卜一之 张清华 |
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| 作者单位： | 西南交通大学土木工程学院,四川 成都,610031 |
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| 基金项目： | 自然科学基金(50908192); 西南交通大学科技发展青年基金(2009QK03);西南交通大学“竢实之星——新世纪优秀人才后备人选培养项目”联合资助 |
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| 摘 要： | 为准确把握拉索的动力学规律并指导工程应用,以拉索非线性振动理论(拉索自振频率的摄动法公式)为基础,以工程中常用的典型拉索为例,对拉索非线性自振频率的边界条件效应、参数敏感性以及区间估计方法进行研究.研究结果表明:拉索的边界条件效应随拉索长度、索力以及频率阶次的不同而不同；索力、线密度、弦长、抗弯刚度4个参数对于拉索各阶自振频率在影响程度、影响方式方面均存在显著差异,总体而言,自振频率偏差与索力和抗弯刚度2个参数的偏差成正比,与线密度和弦长2个参数的偏差成反比；根据拉索参数的概率统计特征能够获得拉索自振频率的区间估计.
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| 关 键 词： | 拉索 非线性振动 自振频率 敏感性 区间估计 |
Parameter Sensitivity Analysis and Interval Estimation of Nonlinear Natural Vibration Frequencies of Stay Cables |
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| BU Yi-zhi
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ZHANG Qing-hua.Parameter Sensitivity Analysis and Interval Estimation of Nonlinear Natural Vibration Frequencies of Stay Cables[J].Bridge Construction,2011(6). |
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| Authors: | BU Yi-zhi ZHANG Qing-hua |
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| Institution: | BU Yi-zhi,ZHANG Qing-hua(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China) |
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| Abstract: | To have an exact understanding of the dynamic law of stay cables and to guide the practical engineering application,the boundary condition effect,parameter sensitivity and interval estimation methods of nonlinear natural vibration frequencies of the stay cables were studied on the basis of the nonlinear vibration theory of the cables(perturbation method formulas for the natural vibration frequencies) and by way of examples of the typical stay cables commonly used in the practical engineering.The results of ... |
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| Keywords: | stay cable nonlinear vibration natural vibration frequency sensitivity interval estimation |
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