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采用自由振动法对汽机房屋面网架的动力特性进行实测，并用子空间迭代法对其动力特性进行了计算。根据实测和计算结果，对汽机房屋面网架的动力性能进行了分析
The dynamic characteristics of steam turbine roofing truss are measured by free vibration method, and its dynamic characteristics are calculated by subspace iteration method. According to the measured and calculated results, the dynamic performance of steam turbine roofing truss is analyzed