三层空间钢架模型模态试验的两种方法对比

为了研究三层空间结构动力性能的,采用单输入多输出的方法对三层空间钢架模型进行模态试验,并应用有限元分析软件ANSYS10.0建立钢架的有限元模型进行模拟模态分析。结果表明,由试验得出该模型的固有频率、振型、阻尼比等动力学参数与数值模拟结果基本一致。试验结果进一步验证了有限元模型分析的正确性。有限元模型能够很好的模拟结构的动力特性,利用数值模拟方法可以不制作实体试验模型就能研究结构的动力特性。

Comparison Between Two Methods for Modal Experiment of Three-floor Space Steel Framework

A modal experiment is carried out by adopting the single-input and multi-output method to get the vibration mode of a three-floor space steel framework,and the dynamic parameters such as the natural frequency,vibration mode,and shape damping ratio are also obtained.At the same time,the finite element analysis program ANSYS 10.0 is used to bulid the computing model of the steel frame,and the frequency and vibration mode of the structure are calculated and compared with the experimental results.The reasonability of experimental results and the validity of computing results have been confirmed at last.