高耸塔式结构动力特性设计与测试

发布时间：2018-05-21 08:39

本文选题：动力特性 + 现场测试　；参考：《振动.测试与诊断》2017年01期

【摘要】：为了满足上置设备工作需要,高耸塔式结构基频要大于某一给定数值。通过对结构基频计算公式和结构变形曲线分析,增大结构基频应以降低结构顶部质量和提高结构底部刚度为主的频率调整基本原则。基于空间有限元理论,通过模态分析获得了结构的频率和振型。利用环境激励下结构振动模态参数识别方法对雷达塔进行动力检测。采用模态识别法求出结构的前三阶频率、振型和阻尼值。引入模态置信因子和标准化模态差准则,对计算振型数据和实测振型数据进行分析比较,以验证有限元计算的准确性。该研究成果为深入研究高耸塔式结构频率调整、准确预测结构的动力响应提供可靠依据。
[Abstract]:In order to meet the working needs of the upper equipment, the fundamental frequency of the towering tower structure is larger than a given value. Based on the analysis of the fundamental frequency formula and deformation curve of the structure, the basic principle of frequency adjustment for increasing the fundamental frequency of the structure should be to reduce the mass at the top of the structure and increase the stiffness of the bottom of the structure. Based on the spatial finite element theory, the frequencies and modes of the structure are obtained by modal analysis. The dynamic detection of radar tower is carried out by using the identification method of structural vibration modal parameters under ambient excitation. The first three order frequencies, modes and damping of the structure are obtained by modal identification method. In order to verify the accuracy of finite element calculation, the modal confidence factor and standardized modal difference criterion are introduced to analyze and compare the calculated modal data and the measured modal data. The research results provide reliable basis for further study on frequency adjustment of towering tower structure and accurate prediction of dynamic response of structure.
【作者单位】：华北水利水电大学土木与交通学院;郑州大学土木工程学院;郑州大学水利与环境学院;
【基金】：国家自然科学基金资助项目(50978232) 河南教育厅资助项目(14B560029) 华北水利水电大学高层次人才基金资助项目(201246)
【分类号】：TU311.3

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