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采用环境随机振动法对北京首都国际机场AMECO-A380六机位维修机库大跨空间网架结构进行了现场结构动力特性测试。利用谱分析方法对实测数据进行了参数识别和处理,并进行了振型分析,确定了机库屋架结构的自振频率和振型。并用有限元模型计算了结构自振频率和振型。对测试和计算结果进行的分析比较结果表明,结构基本周期的测试值和计算值接近,各自所对应的第1阶振型吻合较好。
Environmental dynamic vibration method was used to test the on-site structural dynamic characteristics of large-span space truss of AMECO-A380 six-hangover hangar at Beijing Capital International Airport. The spectral analysis method was used to identify and process the measured data. The modal analysis was done to determine the natural frequency and mode shape of the hangar truss structure. The natural frequency and mode shape of the structure were calculated by finite element model. Analysis and comparison of test results and calculation results show that the test values and calculated values of the basic structure cycles are similar, and the corresponding first order mode shapes agree well.