汉江大跨越输电模型塔试验研究

The Model Test Study of Hanjiang Long Span Tower

为了深入探索模型塔动力特性，以汉江大跨越塔为原型，按照动力相似理论制作了模型塔。试验采用施加突卸荷载的方法使模型产生自由振动，获取模型动力参数。结果表明，模型前两阶固有频率满足相似要求，模型设计合理。为更好地研究模型塔动力特性，在模型塔动力测试基础上，建立了模型塔有限元模型，对测试结果与模态分析结果进行了比较，提出了模型设计和制作的建议。

To study the dynamic properties of the model tower in depth, according to the dynamical similarity theory, the tower model whose prototype is Hanjiang long span tower is manufactured. The dump load is applied in the experiment to generate the free vibration and acquire the dynamic data. The experimental results indicate that the model design is rational, for that the primary and second natural frequency meets similarity theory demand. To further study the dynamic property of the model tower, the finite model is founded on the basis of dynamic model testing. Drawing a comparison between the result of model analysis with that of the trial data, it puts forward the suggestions on how to design and fabricate the model.