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通过１∶１００的弹性相似模型，应用实验模态分析的时域法，识别了三峡升船机塔柱结构的模态参数。利用传统的振型分解反应谱法，初估了塔柱结构的振动位移。经计算机仿真输入地震波（时程分析法），估算了典型节点振动位移与柱顶结点的相对位移时程曲线及其特征值。运用结构动特性的灵敏度分析，对原设计进行动态优化设计，估算证明，修改设计的抗震性能较原设计有较大的改善。
Through the elastic analogy model of 1: 100, the modal parameters of tower structure of Three Gorges Shiplift were identified by the time domain method of experimental modal analysis. The traditional vibration mode decomposition reaction spectrum method was used to estimate the vibration displacement of the tower structure. By computer simulation of input seismic wave (time-history analysis), the relative displacement time history curve and its eigenvalue of the typical node vibration displacement and the top node are estimated. Using the sensitivity analysis of structural dynamic characteristics, the dynamic design of the original design is carried out. The estimation shows that the seismic design performance of the modified design is greatly improved compared with the original design.