九江桥三大拱吊杆振动参数测试

本文探讨了用人工释放产生的自由衰减振动信号识别大型桥梁结构振动参数问题，介绍了用自由振动法对九江长江大桥三大拱吊杆作振动测试的实施方案与测试结果。通过与脉动法结果比较并加以检验，该测试结果有较高精度，可以作为实桥吊杆涡振抑制措施研究的原始设计参数。

Vibration Measurement for Booms of Three Large Arches on Jiujiang Yangtse River Bridge

In this paper, the problems of vibration measurement of structure on large bridge by using of free vibration are investigated. The approach and results of the vibration measurementfor booms of three large arches on Jiujiang Yangtse River Bridge are also introduced.Checked and compared with the results of pulsation method, it concludes that the measuredresults have higher precision and can be used as the original design parameters for suppresionof vortex-induceds oscillations in the real booms of bridge.