噪声与振动控制2018，Vol.38Issue(1)：21-25,5.DOI:10.3969/j.issn.1006-1355.2018.01.004
基于预实验分析的箱梁模型模态测试
Modal Test of the Box-girder Model Based on Pre-test Analysis
摘要
Abstract
With the box-girder model as the experimental object,a method based on pre-test analysis is used to identify its modals. Firstly, based on the results of modal analysis of the finite element model, the reasonable distribution of the measurement points and the optimal excitation point are determined by pre-test analysis. Then, the modals of a freely supported box-girder model are identified using the vibration exciter based on the pre-test results. Finally, the correlation between the modal results from the experiments and the finite element simulation is analyzed to verify the credibility of the experimental modal data.The experimental results show that the error of the identified 4-th order modal frequency is within 10 % in comparison with the finite element simulation results,and the errors of the first three order modal frequencies are all within 5 %.And the results of the correlation analysis show that the similarity between the measured modal data and the finite element results is high,especially the correlativity of the first two modals is up to 90 %.关键词
振动与波/预实验分析/箱梁/模态测验/相关性分析Key words
vibration and wave/pre-test analysis/box-girder/modal test/correlation analysis分类
数理科学引用本文复制引用
曾少辉,雷晓燕,罗锟,汪振国,欧开宽..基于预实验分析的箱梁模型模态测试[J].噪声与振动控制,2018,38(1):21-25,5.基金项目
国家自然科学基金资助项目(51478184) （51478184）
国家自然科学基金资助项目(51268015) （51268015）
江西省优秀科技创新团队计划资助项目(20133BCB24007) （20133BCB24007）
