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从压电弹性体的本构关系和机电耦合变分原理出发，建立了智能桁架结构的机电耦合有限元动力方程。由此推导出智能桁架结构的动态响应与压电主动构件输入电压之间的机电耦合传递函数，并给出结构模态参数识别方法，提出了利用压电主动构件作为智能桁架结构内激励源的结构模态测试新理论。最后，用文中的分析方法建立了一个三维智能桁架结构的动力学模型，有限元计算与实验结果的一致性很好。
From the constitutive relation of piezoelectric elastic body and the principle of electromechanical coupling variation, the electromechanical coupling finite element dynamic equation of intelligent truss structure is established. The electromechanical coupling transfer function between the dynamic response of the smart truss structure and the input voltage of the piezoelectric active component is deduced, and the identification method of the structural modal parameter is given. The piezoelectric active component is used as the excitation source in the intelligent truss structure. New theory of structural modal testing. Finally, a dynamic model of a three-dimensional intelligent truss structure is established using the analysis method in this paper. The finite element calculation is in good agreement with the experimental results.