【摘要】 以一个张弦拱桁架结构的缩尺模型为试验对象,研究了两种结构模态测试方法:基于自然激励的谱分析方法和基于自由振动响应的ITD法,对比分析了两种方法的测试过程及结果表明:两种不同的测试方法得到的结果能够较好的吻合,所得到的模态参数具有良好的可靠性。更多还原

【Abstract】 Two methods of modal testing were studied with respect to an arch truss string structure model.The spectrum analysis method based on natural excitation and ITD method based on free vibration respond.The testing processes and results of them were compared and analyzed.The analysis results showed that: testing results of two different methods are very contiguous.Modal parameters by testing were reliable.更多还原